76 lines
3.6 KiB
Text
76 lines
3.6 KiB
Text
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import "pe"
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rule Win32_Virus_DeadCode : tc_detection malicious
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{
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meta:
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author = "ReversingLabs"
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source = "ReversingLabs"
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status = "RELEASED"
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sharing = "TLP:WHITE"
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category = "MALWARE"
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malware = "DEADCODE"
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description = "Yara rule that detects DeadCode virus."
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tc_detection_type = "Virus"
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tc_detection_name = "DeadCode"
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tc_detection_factor = 5
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strings:
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$deadcode_ep_1 = {
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64 67 FF 36 30 00 58 8B 40 08 FF 70 48 5B FF 70 4C 5A 03 40 44
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FF E0
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}
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$deadcode_marker = {
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DE C0 AD DE
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}
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$deadcode_ep_2 = {
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2B C0 85 C0 74 0E 64 67 FF 36 00 00 64 67 89 26 00 00 89 00 E8
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ED FF FF FF 8B 74 24 0C 64 67 A1 30 00 8B 40 08 8B 58 48 8B 50
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4C 03 40 44 89 86 B8 00 00 00 89 86 B0 00 00 00 89 9E A4 00 00
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00 89 96 A8 00 00 00 2B C0 C3
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}
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$deadcode_ep_3 = {
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B8 DE C0 AD DE 50 5A 64 67 A1 30 00 8B 40 08 8B 58 48 8B 50 4C
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03 40 44 FF D0
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}
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$deadcode_body_1 = {
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8B D0 8B EA 81 C5 ?? ?? ?? ?? 89 85 A4 00 00 00 89 9D C0 00 00 00 E8 56 01 00 00 89
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45 00 8D 75 04 81 C2 ?? ?? ?? ?? 6A 19 FF 75 00 52 56 E8 CE 01 00 00 64 67 A1 30 00
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8B 40 08 89 85 88 00 00 00 C7 85 D0 00 00 00 ?? ?? ?? ?? E8 09 00 00 00 8B 64 24 08
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E9 03 01 00 00 33 D2 64 FF 32 64 89 22 83 BD C0 00 00 00 00 75 2F 6A 04 68 00 10 00
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00 68 40 01 00 00 6A 00 FF 55 08 50 8F 45 78 E8 2A 03 00 00 68 00 40 00 00 68 40 01
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00 00 FF 75 78 FF 55 28 E9 C3 00 00 00 8B 85 A4 00 00 00 05 ?? ?? ?? ?? 8D B5 B4 00
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00 00 56 6A 00 55 50 68 00 00 10 00 6A 00 FF 55 30 89 85 AC 00 00 00 6A 04 68 00 10
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00 00 6A 54 6A 00 FF 55 08 89 85 A8 00 00 00 64 67 A1 30 00 8B 40 10 8B 40 3C 8B B5
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A8 00 00 00 8D 7E 10 56 57 6A 00 6A 00 6A 04 6A 01 6A 00 6A 00 50 6A 00 FF 55 50 85
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C0 74 5D FF 76 04 8F 85 B0 00 00 00 64 67 A1 30 00 8B 40 08 8B D8 03 5B 3C 8B 5B 28
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03 D8 8B 8D A4 00 00 00 81 ?? ?? ?? ?? 8D 85 B4 00 00 00 50 6A ?? 51 53 FF 36 FF 55
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4C FF 76 04 FF 55 54 8D B5 AC 00 00 00 6A FF 6A 01 56 6A 02 FF 55 34 68 00 40 00 00
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6A 54 FF B5 A8 00 00 00 FF 55 28 33 D2 64 8F 02 5A E8 DB 01 00 00 E8 F5 00 00 00 6A
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00 FF 55 3C 64 67 8B 36 00 00 AD 83 F8 FF 74 04 8B F0 EB F6 8B 7E 04 81 E7 00 00 FF
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FF 66 81 3F 4D 5A 74 08 81 EF 00 00 01 00 EB F1 8B DF 03 5B 3C 66 81 3B 50 45 74 02
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EB E3 8B C7 C3 55 8B EC 8B 75 0C AC 84 C0 75 FB 2B 75 0C 8B CE 8B 5D 08 03 5B 3C 8B
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5B 78 03 5D 08 8B 53 20 03 55 08 2B C0 8B 32 03 75 08 8B 7D 0C 51 FC F3 A6 59 74 06
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}
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$deadcode_body_2 = {
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83 C2 04 40 EB EB 8B 73 24 03 75 08 2B D2 66 8B 14 46 8B 73 1C 03 75 08 8B 04 96 03
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45 08 8B E5 5D C2 08 00 55 8B EC 8B 7D 08 8B 75 0C 8B 4D 14 51 56 57 56 FF 75 10 E8
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91 FF FF FF 5F 5E 59 AB AC 84 C0 75 FB E2 E9 8B E5 5D C2 10 00 8B 6C 24 04 6A 04 68
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00 10 00 00 68 40 01 00 00 6A 00 FF 55 08 85 C0 74 18 89 45 78 E8 63 01 00 00 68 00
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40 00 00 68 40 01 00 00 FF 75 78 FF 55 28 6A 00 FF 55 40 C3
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}
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condition:
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uint16(0) == 0x5A4D and
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((($deadcode_ep_1 at pe.entry_point) and ($deadcode_marker at 0x40)) or
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(($deadcode_ep_2 at pe.entry_point) and ($deadcode_marker at 0x40)) or
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(($deadcode_ep_3 at pe.entry_point) and ($deadcode_marker at 0x40)) or
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($deadcode_body_1 and $deadcode_body_2))
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}
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