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30 lines
1.4 KiB
Plaintext
30 lines
1.4 KiB
Plaintext
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rule APT_ArtraDownloader2_Aug19_1 {
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meta:
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description = "Detects ArtraDownloader malware"
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author = "Florian Roth"
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reference = "https://unit42.paloaltonetworks.com/multiple-artradownloader-variants-used-by-bitter-to-target-pakistan/"
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date = "2019-08-27"
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hash1 = "f0ef4242cc6b8fa3728b61d2ce86ea934bd59f550de9167afbca0b0aaa3b2c22"
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strings:
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$xc1 = { 47 45 54 20 25 73 20 48 54 54 50 2F 31 2E 30 00
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0D 0A 00 00 48 6F 73 74 3A 20 25 73 00 00 00 00
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3F 61 3D 00 26 62 3D 00 26 63 3D 00 26 64 3D 00
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26 65 3D 00 25 32 30 }
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$xc2 = { 25 73 20 25 73 20 25 73 0D 0A 25 73 20 25 73 0D
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0A 25 73 25 73 0D 0A 25 73 25 73 0D 0A 25 73 20
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25 64 0D 0A 0D 0A 25 73 00 00 00 00 71 72 79 3D }
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$xc3 = { 49 44 3D 25 73 00 00 00 3A 00 00 00 25 73 20 25
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73 20 25 73 0D 0A 25 73 20 25 73 0D 0A 25 73 25
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73 0D 0A 25 73 25 73 0D 0A 43 6F 6E 74 65 6E 74
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2D 6C 65 6E 67 74 68 25 73 20 25 64 }
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$xc4 = { 25 73 20 25 73 20 25 73 0D 0A 25 73 20 25 73 0D
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0A 25 73 25 73 0D 0A 25 73 25 73 0D 0A 43 6F 6E
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74 65 6E 74 2D 6C 65 6E 67 74 68 3A 20 25 64 0D
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0A 0D 0A 25 73 }
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$x1 = "Tpguxbsf]Njdsptpgu" ascii
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$x2 = ".gpsn.vsmfodpefe" ascii
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condition:
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uint16(0) == 0x5a4d and filesize < 600KB and 1 of them
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}
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