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68 lines
2.8 KiB
Plaintext
68 lines
2.8 KiB
Plaintext
/*
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Yara Rule Set
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Author: Florian Roth
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Date: 2017-06-27
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Identifier: Petya
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Reference: https://goo.gl/h6iaGj
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https://gist.github.com/vulnersCom/65fe44d27d29d7a5de4c176baba45759
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*/
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/* Rule Set ----------------------------------------------------------------- */
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rule NoPetya_Ransomware_Jun17 {
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meta:
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description = "Detects new Petya Ransomware variant from June 2017"
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author = "Florian Roth"
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reference = "https://goo.gl/h6iaGj"
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date = "2017-06-27"
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hash1 = "027cc450ef5f8c5f653329641ec1fed91f694e0d229928963b30f6b0d7d3a745"
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strings:
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$x1 = "Ooops, your important files are encrypted." fullword wide
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$x2 = "process call create \"C:\\Windows\\System32\\rundll32.exe \\\"C:\\Windows\\%s\\\" #1 " fullword wide
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$x3 = "-d C:\\Windows\\System32\\rundll32.exe \"C:\\Windows\\%s\",#1 " fullword wide
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$x4 = "Send your Bitcoin wallet ID and personal installation key to e-mail " fullword wide
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$x5 = "fsutil usn deletejournal /D %c:" fullword wide
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$x6 = "wevtutil cl Setup & wevtutil cl System" ascii
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$s1 = "%s /node:\"%ws\" /user:\"%ws\" /password:\"%ws\" " fullword wide
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$s4 = "\\\\.\\pipe\\%ws" fullword wide
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$s5 = "schtasks %ws/Create /SC once /TN \"\" /TR \"%ws\" /ST %02d:%02d" fullword wide
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$s6 = "u%s \\\\%s -accepteula -s " fullword wide
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$s7 = "dllhost.dat" fullword wide
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condition:
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uint16(0) == 0x5a4d and filesize < 1000KB and ( 1 of ($x*) or 3 of them )
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}
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rule NoPetya_Rel_Malware {
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meta:
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description = "Detects NoPetya related malware - karo.exe"
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author = "Florian Roth"
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reference = "https://gist.github.com/vulnersCom/65fe44d27d29d7a5de4c176baba45759"
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date = "2017-06-27"
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hash1 = "e5c643f1d8ecc0fd739d0bbe4a1c6c7de2601d86ab0fff74fd89c40908654be5"
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hash2 = "7f081859ae2b9b59f014669233473921f1cac755f6c6bbd5dcdd3fafbe710000"
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hash3 = "3e896599851231d11c06ee3f5f9677436850d3e7d745530f0a46f712e37ce082"
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strings:
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$s1 = "PublicKeyToken=3e56350693f7355e" fullword wide
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$s2 = "karo.exe" fullword wide
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$s3 = "IWshShell3" fullword ascii
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condition:
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( uint16(0) == 0x5a4d and filesize < 2000KB and all of them )
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}
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rule NoPetya_Rel_Malware_3 {
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meta:
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description = "Detects NoPetya related malware - iosi.exe"
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author = "Florian Roth"
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reference = "https://gist.github.com/vulnersCom/65fe44d27d29d7a5de4c176baba45759"
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date = "2017-06-27"
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hash1 = "2ddf8df2ee880dae54a7f52e4bf56f896bb3f873fb6b8fdb60cae4a3de16ff49"
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strings:
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$s1 = "PublicKeyToken=3e56350693f7355e" fullword wide
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$s2 = "iosi.exe" fullword wide
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$s3 = "WshExecStatus" fullword ascii
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$s4 = "IsX64Process" fullword ascii
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condition:
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( uint16(0) == 0x5a4d and filesize < 2000KB and all of them )
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}
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