51 lines
2.2 KiB
Text
51 lines
2.2 KiB
Text
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/*
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Yara Rule Set
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Author: Florian Roth
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Date: 2017-07-11
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Identifier: WinPayloads
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Reference: https://github.com/nccgroup/Winpayloads
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*/
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/* Rule Set ----------------------------------------------------------------- */
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rule WinPayloads_PowerShell {
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meta:
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description = "Detects WinPayloads PowerShell Payload"
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license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
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author = "Florian Roth (Nextron Systems)"
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reference = "https://github.com/nccgroup/Winpayloads"
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date = "2017-07-11"
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hash1 = "011eba8f18b66634f6eb47527b4ceddac2ae615d6861f89a35dbb9fc591cae8e"
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id = "8b6b8823-4656-5b0d-9a1e-84045287f5bf"
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strings:
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$x1 = "$Base64Cert = 'MIIJeQIBAzCCCT8GCSqGSIb3DQEHAaCCCTAEggksMIIJKDCCA98GCSqGSIb3DQEHBqCCA9AwggPMAgEAMIIDxQYJKoZIhvcNAQcBMBwGCiqGSIb3D" ascii
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$x2 = "powershell -w hidden -noni -enc SQBF" fullword ascii nocase
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$x3 = "SQBFAFgAIAAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABOAGUAdAAuAFcAZQBiAGMAbABpAGUAbgB0ACkALgBEAG8AdwBuAGwA" ascii
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$x4 = "powershell.exe -WindowStyle Hidden -enc JABjAGwAaQBlAG4AdAA" ascii
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condition:
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filesize < 10KB and 1 of them
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}
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rule WinPayloads_Payload {
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meta:
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description = "Detects WinPayloads Payload"
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license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
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author = "Florian Roth (Nextron Systems)"
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reference = "https://github.com/nccgroup/Winpayloads"
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date = "2017-07-11"
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super_rule = 1
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hash1 = "23a24f99c3c6c00cd4bf6cb968f813ba2ceadfa846c7f169f412bcbb71ba6573"
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hash2 = "35069905d9b7ba1fd57c8df03614f563504194e4684f47aafa08ebb8d9409d0b"
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hash3 = "a28d107f168d85c38fc76229b14561b472e60e60973eb10b6b554c1f57469322"
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hash4 = "ed93e28ca18f749a78678b1e8e8ac31f4c6c0bab2376d398b413dbdfd5af9c7f"
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hash5 = "26f5aee1ce65158e8375deb63c27edabfc9f5de3c1c88a4ce26a7e50b315b6d8"
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hash6 = "b25a515706085dbde0b98deaf647ef9a8700604652c60c6b706a2ff83fdcbf45"
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id = "44fae324-1fc8-5417-950a-8a3783b6d2ae"
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strings:
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$s1 = "bpayload.exe.manifest" fullword ascii
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$s2 = "spayload" fullword ascii
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condition:
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( uint16(0) == 0x5a4d and filesize < 10000KB and all of them )
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}
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