115 lines
4.5 KiB
Text
115 lines
4.5 KiB
Text
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// Brambul related signatures
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import "pe"
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rule SierraBravo_Two
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{
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meta:
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copyright = "2015 Novetta Solutions"
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author = "Novetta Threat Research & Interdiction Group - trig@novetta.com"
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strings:
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/*
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.text:00403D5A mov word ptr [esi+0Eh], 0C807h
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.text:00403D60 mov dword ptr [esi+39h], 800000D4h
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.text:00403D67 mov byte ptr [edi], 0Ch <---- ignored
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.text:00403D6A mov word ptr [esi+25h], 0FFh
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.text:00403D70 mov word ptr [esi+27h], 0A4h
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.text:00403D76 mov word ptr [esi+29h], 4104h
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.text:00403D7C mov word ptr [esi+2Bh], 32h
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or
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.text:100036F9 mov word ptr [ebx+0Eh], 0C807h
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---- begin ignored -----
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.text:100036FF rep movsd
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.text:10003701 lea edi, [ebx+60h]
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.text:10003704 mov ecx, 9
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.text:10003709 mov esi, offset aWindows2000219 ; "windows 2000 2195"
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---- end ignored -----
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.text:1000370E mov dword ptr [ebx+39h], 800000D4h
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.text:10003715 mov word ptr [ebx+25h], 0FFh
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.text:1000371B mov word ptr [ebx+27h], 0A4h
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.text:10003721 mov word ptr [ebx+29h], 4104h
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.text:10003727 mov word ptr [ebx+2Bh], 32h
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*/
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$smbComNegotiationPacketGen = { 66 C7 ?? 0E 07 C8
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[0-32]
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C7 ?? 39 D4 00 00 80
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[0-32]
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66 C7 ?? 25 FF 00
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[0-32]
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66 C7 ?? 27 A4 00
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[0-32]
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66 C7 ?? 29 04 41
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[0-32]
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66 C7 ?? 2B 32 00
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}
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$lib = "!emCFgv7Xc8ItaVGN0bMf"
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$api1 = "!ctRHFEX5m9JnZdDfpK"
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$api2 = "!emCFgv7Xc8ItaVGN0bMf"
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$api3 = "!VWBeBxYx1nzrCkBLGQO"
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$pwd = "iamsorry!@1234567"
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condition:
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$smbComNegotiationPacketGen in ((pe.sections[pe.section_index(".text")].raw_data_offset)..(pe.sections[pe.section_index(".text")].raw_data_offset + pe.sections[pe.section_index(".text")].raw_data_size))
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or ($pwd in ((pe.sections[pe.section_index(".data")].raw_data_offset)..(pe.sections[pe.section_index(".data")].raw_data_offset + pe.sections[pe.section_index(".data")].raw_data_size))
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and
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($lib in ((pe.sections[pe.section_index(".data")].raw_data_offset)..(pe.sections[pe.section_index(".data")].raw_data_offset + pe.sections[pe.section_index(".data")].raw_data_size))
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or $api1 in ((pe.sections[pe.section_index(".data")].raw_data_offset)..(pe.sections[pe.section_index(".data")].raw_data_offset + pe.sections[pe.section_index(".data")].raw_data_size))
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or $api2 in ((pe.sections[pe.section_index(".data")].raw_data_offset)..(pe.sections[pe.section_index(".data")].raw_data_offset + pe.sections[pe.section_index(".data")].raw_data_size))
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or $api3 in ((pe.sections[pe.section_index(".data")].raw_data_offset)..(pe.sections[pe.section_index(".data")].raw_data_offset + pe.sections[pe.section_index(".data")].raw_data_size))
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))
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}
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rule SierraBravo_One
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{
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meta:
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copyright = "2015 Novetta Solutions"
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author = "Novetta Threat Research & Interdiction Group - trig@novetta.com"
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strings:
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/*
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.text:00402A65 push 8004667Eh ; cmd
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.text:00402A6A push esi ; s
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.text:00402A6B call ioctlsocket
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.text:00402A70 push 32h ; dwMilliseconds
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.text:00402A72 mov [esp+24Ch+writefds.fd_array], esi
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.text:00402A79 mov [esp+24Ch+writefds.fd_count], 1
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.text:00402A84 mov [esp+24Ch+timeout.tv_sec], 3
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.text:00402A8C mov [esp+24Ch+timeout.tv_usec], 0
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*/
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$spreaderSetup = {68 7E 66 04 80
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5?
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E8 [4]
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6A 32
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89 B4 [5]
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C7 84 [5] 01 00 00 00
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C7 44 [2] 03 00 00 00
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C7 44 [2] 00 00 00 00 }
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condition:
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$spreaderSetup in ((pe.sections[pe.section_index(".text")].raw_data_offset)..(pe.sections[pe.section_index(".text")].raw_data_offset + pe.sections[pe.section_index(".text")].raw_data_size))
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}
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rule SierraBravo_packed
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{
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meta:
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copyright = "2015 Novetta Solutions"
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author = "Novetta Threat Research & Interdiction Group - trig@novetta.com"
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strings:
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$ = "cmd.exe /c \"net share admin$ /d\""
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$ = "MAIL FROM:<"
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$ = ".petite"
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$ = "Subject: %s|%s|%s"
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condition:
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3 of them
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}
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