60 lines
2.5 KiB
Text
60 lines
2.5 KiB
Text
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rule APT_PS1_SysAid_EXPL_ForensicArtifacts_Nov23_1 : SCRIPT {
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meta:
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description = "Detects forensic artifacts found in attacks on SysAid on-prem software exploiting CVE-2023-47246"
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author = "Florian Roth"
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score = 85
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reference = "https://www.sysaid.com/blog/service-desk/on-premise-software-security-vulnerability-notification"
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date = "2023-11-09"
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id = "df7997d3-9309-58b3-8cd7-de9fea36d3c7"
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strings:
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$x1 = "if ($s -match '^(Sophos).*\\.exe\\s') {echo $s; $bp++;}" ascii wide
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$x2 = "$s=$env:SehCore;$env:SehCore=\"\";Invoke-Expression $s;" ascii wide
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condition:
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1 of them
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}
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rule MAL_Loader_TurtleLoader_Nov23 {
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meta:
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description = "Detects Tutle loader used in attacks against SysAid CVE-2023-47246"
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author = "Florian Roth"
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reference = "https://www.sysaid.com/blog/service-desk/on-premise-software-security-vulnerability-notification"
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date = "2023-11-09"
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score = 85
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hash1 = "b5acf14cdac40be590318dee95425d0746e85b1b7b1cbd14da66f21f2522bf4d"
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id = "c7b5d03d-52c4-59b4-ac69-55e532a21340"
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strings:
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$s1 = "No key in args!" ascii fullword
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$s2 = "Bad data file!" ascii fullword
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$s3 = "Data file loaded. Running..." ascii
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$op1 = { 48 8d 55 c8 4c 8d 3d ac 8f 00 00 45 33 c9 45 33 d2 4d 8b e7 44 21 0a 45 33 db 4c 8d 3d 16 ec ff ff }
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$op2 = { 48 d3 e8 0f b6 c8 49 03 cb 49 81 c3 00 01 00 00 45 33 8c 8f a0 e4 00 00 41 83 fa 04 7c c7 41 ff c0 }
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$op3 = { 48 83 c1 04 48 ff ca 89 41 1c 75 ef 03 f6 48 83 c3 20 48 ff cd 0f 85 77 ff ff ff }
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condition:
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uint16(0) == 0x5a4d
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and filesize < 200KB
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and 3 of them
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}
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rule MAL_Grace_Dec22 {
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meta:
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author = "X__Junior"
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reference = "https://blog.talosintelligence.com/breaking-the-silence-recent-truebot-activity/"
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description = "Detects Grace (aka FlawedGrace and GraceWire) RAT"
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date = "2022-12-13"
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hash1 = "a66df3454b8c13f1b92d8b2cf74f5bfcdedfbff41a5e4add62e15277d14dd169"
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hash2 = "e113a8df3c4845365f924bacf10c00bcc5e17587a204b640852dafca6db20404"
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score = 70
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id = "fc2214dc-f1e5-52d7-a9de-88709a03b04e"
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strings:
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$sa1 = "Grace finalized, no more library calls allowed." ascii
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$sa2 = "Socket forcibly closed due to no response to DISCONNECT signal from other side, worker id(%d)" ascii
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$sa3 = "AVWireCleanupThread" ascii
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$sa4 = "AVTunnelClientDirectIO" ascii
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$sa5 = "AVGraceTunnelWriteThread" ascii
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$sa6 = "AVGraceTunnelClientDirectIO" ascii
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condition:
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2 of them
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}
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