25 lines
1.1 KiB
Text
25 lines
1.1 KiB
Text
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rule SUSP_VEST_Encryption_Core_Accumulator_Jan21 {
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meta:
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description = "Detects VEST encryption core accumulator in PE file as used by Lazarus malware"
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author = "Florian Roth (Nextron Systems)"
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reference = "https://twitter.com/ochsenmeier/status/1354737155495649280"
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date = "2021-01-28"
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score = 70
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hash1 = "7cd3ca8bdfb44e98a4b9d0c6ad77546e03d169bda9bdf3d1bcf339f68137af23"
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id = "8343652b-8865-5213-b735-d6d4084e4a84"
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strings:
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$sc1 = { 4F 70 46 DA E1 8D F6 41 59 E8 5D 26 1E CC 2F 89
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26 6D 52 BA BC 11 6B A9 C6 47 E4 9C 1E B6 65 A2
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B6 CD 90 47 1C DF F8 10 4B D2 7C C4 72 25 C6 97
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25 5D C6 1D 4B 36 BC 38 36 33 F8 89 B4 4C 65 A7
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96 CA 1B 63 C3 4B 6A 63 DC 85 4C 57 EE 2A 05 C7
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0C E7 39 35 8A C1 BF 13 D9 52 51 3D 2E 41 F5 72
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85 23 FE A1 AA 53 61 3B 25 5F 62 B4 36 EE 2A 51
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AF 18 8E 9A C6 CF C4 07 4A 9B 25 9B 76 62 0E 3E
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96 3A A7 64 23 6B B6 19 BC 2D 40 D7 36 3E E2 85
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9A D1 22 9F BC 30 15 9F C2 5D F1 23 E6 3A 73 C0 }
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condition:
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uint16(0) == 0x5a4d and
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1 of them
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}
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