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import "pe"
rule WhiskeyAlfa
{
meta:
copyright = "2015 Novetta Solutions"
author = "Novetta Threat Research & Interdiction Group - trig@novetta.com"
Source = "1c66e67a8531e3ff1c64ae57e6edfde7bef2352d.ex_"
strings:
/*
E8 77 07 00 00 call _rand
B1 FB mov cl, 0FBh
F6 E9 imul cl
88 44 34 08 mov [esp+esi+10008h+randomData], al
46 inc esi
81 FE 00 00 01 00 cmp esi, 10000h
7C EA jl short loc_402E8D
*/
$randomBuffer = {E8 [4] B1 ?? F6 E9 88 [3] 4? 81 ?? 00 00 01 00 7C}
/*
89 58 09 mov [eax+9], ebx
C7 40 65 00 00 02 00 mov dword ptr [eax+65h], 20000h
C7 40 15 04 00 00 00 mov dword ptr [eax+15h], 4
C6 40 08 08 mov byte ptr [eax+8], 8
C7 40 04 00 02 00 00 mov dword ptr [eax+4], 200h
89 18 mov [eax], ebx
89 58 0D mov [eax+0Dh], ebx
C7 40 11 01 00 00 00 mov dword ptr [eax+11h], 1
89 58 69 mov [eax+69h], ebx
89 58 19 mov [eax+19h], ebx
B8 01 00 00 00 mov eax, 1
*/
$mbrDiskInfo = {89 ?? 09 C7 ?? 65 00 00 02 00 C7 ?? 15 04 00 00 00 C6 ?? 08 08 C7 ?? 04 00 02 00 00 89 ?? 89 ?? 0D C7 ?? 11 01 00 00 00 89 ?? 69 89 ?? 19 B8 01 00 00 00}
// the replacement MBRs in both encoded (XOR 0x53) and decoded form
$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 }
$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 }
$licKey = "99E2428CCA4309C68AAF8C616EF3306582A64513E55C786A864BC83DAFE0C78585B692047273B0E55275102C664C5217E76B8E67F35FCE385E4328EE1AD139EA6AA26345C4F93000DBBC7EF1579D4F"
condition:
$licKey or $mbrReplacement_Decoded or $mbrReplacement_Encoded
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))
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))
}