43 lines
1.8 KiB
Text
43 lines
1.8 KiB
Text
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rule APT_KE3CHANG_TMPFILE: APT KE3CHANG TMPFILE {
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meta:
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description = "Detects Strings left in TMP Files created by K3CHANG Backdoor Ketrican"
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author = "Markus Neis, Swisscom"
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reference = "https://app.any.run/tasks/a96f4f9d-c27d-490b-b5d3-e3be0a1c93e9/"
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date = "2020-06-18"
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hash1 = "4ef11e84d5203c0c425d1a76d4bf579883d40577c2e781cdccc2cc4c8a8d346f"
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id = "84d411af-ea3d-5862-8c2f-7caca60c1b66"
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strings:
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$pps1 = "PSParentPath : Microsoft.PowerShell.Core\\Registry::HKEY_CURRENT_USE" fullword ascii
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$pps2 = "PSPath : Microsoft.PowerShell.Core\\Registry::HKEY_CURRENT_USE" fullword ascii
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$psp1 = ": Microsoft.PowerShell.Core\\Registry" ascii
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$s4 = "PSChildName : PhishingFilter" fullword ascii
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$s1 = "DisableFirstRunCustomize : 2" fullword ascii
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$s7 = "PSChildName : 3" fullword ascii
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$s8 = "2500 : 3" fullword ascii
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condition:
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uint16(0) == 0x5350 and filesize < 1KB and $psp1 and 1 of ($pps*) and 1 of ($s*)
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}
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rule APT_MAL_Ke3chang_Ketrican_Jun20_1 {
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meta:
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description = "Detects Ketrican malware"
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author = "Florian Roth (Nextron Systems)"
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reference = "BfV Cyber-Brief Nr. 01/2020"
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date = "2020-06-18"
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hash1 = "02ea0bc17875ab403c05b50205389065283c59e01de55e68cee4cf340ecea046"
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hash2 = "f3efa600b2fa1c3c85f904a300fec56104d2caaabbb39a50a28f60e0fdb1df39"
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id = "ccd8322e-c822-512a-9ac5-eabc9d09640b"
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strings:
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$xc1 = { 00 59 89 85 D4 FB FF FF 8B 85 D4 FB FF FF 89 45
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FC 68 E0 58 40 00 8F 45 FC E9 }
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$op1 = { 6a 53 58 66 89 85 24 ff ff ff 6a 79 58 66 89 85 }
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$op2 = { 8d 45 bc 50 53 53 6a 1c 8d 85 10 ff ff ff 50 ff }
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condition:
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uint16(0) == 0x5a4d and
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filesize < 300KB and
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1 of ($x*) or 2 of them
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}
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