69 lines
2.3 KiB
Text
69 lines
2.3 KiB
Text
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import "pe"
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rule WhiskeyAlfa
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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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Source = "1c66e67a8531e3ff1c64ae57e6edfde7bef2352d.ex_"
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strings:
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/*
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E8 77 07 00 00 call _rand
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B1 FB mov cl, 0FBh
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F6 E9 imul cl
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88 44 34 08 mov [esp+esi+10008h+randomData], al
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46 inc esi
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81 FE 00 00 01 00 cmp esi, 10000h
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7C EA jl short loc_402E8D
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*/
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$randomBuffer = {
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E8 [4]
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B1 ??
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F6 E9
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88 [3]
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4?
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81 ?? 00 00 01 00
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7C
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}
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/*
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89 58 09 mov [eax+9], ebx
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C7 40 65 00 00 02 00 mov dword ptr [eax+65h], 20000h
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C7 40 15 04 00 00 00 mov dword ptr [eax+15h], 4
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C6 40 08 08 mov byte ptr [eax+8], 8
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C7 40 04 00 02 00 00 mov dword ptr [eax+4], 200h
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89 18 mov [eax], ebx
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89 58 0D mov [eax+0Dh], ebx
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C7 40 11 01 00 00 00 mov dword ptr [eax+11h], 1
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89 58 69 mov [eax+69h], ebx
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89 58 19 mov [eax+19h], ebx
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B8 01 00 00 00 mov eax, 1
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*/
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$mbrDiskInfo = {
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89 ?? 09
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C7 ?? 65 00 00 02 00
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C7 ?? 15 04 00 00 00
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C6 ?? 08 08
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C7 ?? 04 00 02 00 00
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89 ??
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89 ?? 0D
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C7 ?? 11 01 00 00 00
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89 ?? 69
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89 ?? 19
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B8 01 00 00 00
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}
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// the replacement MBRs in both encoded (XOR 0x53) and decoded form
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$mbrReplacement_Decoded = { B4 43 B0 00 CD 13 FE C2 80 FA 84 7C F3 B2 80 BF 65 7C 81 05 00 04 83 55 02 00 83 55 04 00 }
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$mbrReplacement_Encoded = { E7 10 E3 53 9E 40 AD 91 D3 A9 D7 2F A0 E1 D3 EC 36 2F D2 56 53 57 D0 06 51 53 D0 06 57 53 }
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$licKey = "99E2428CCA4309C68AAF8C616EF3306582A64513E55C786A864BC83DAFE0C78585B692047273B0E55275102C664C5217E76B8E67F35FCE385E4328EE1AD139EA6AA26345C4F93000DBBC7EF1579D4F"
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condition:
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$licKey or $mbrReplacement_Decoded or $mbrReplacement_Encoded
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or $randomBuffer 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 $mbrDiskInfo 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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