43 lines
1.4 KiB
Text
43 lines
1.4 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: 2017-06-20
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Identifier: HTA Anomalies
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Reference: Internal Research
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*/
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/* Rule Set ----------------------------------------------------------------- */
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rule HTA_with_WScript_Shell {
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meta:
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description = "Detects WScript Shell in HTA"
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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://twitter.com/msftmmpc/status/877396932758560768"
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date = "2017-06-21"
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score = 80
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hash1 = "ca7b653cf41e980c44311b2cd701ed666f8c1dbc"
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id = "2faf74b1-c19c-53f0-ad08-be9caf5640bc"
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strings:
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$s1 = "<hta:application windowstate=\"minimize\"/>"
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$s2 = "<script>var b=new ActiveXObject(\"WScript.Shell\");" ascii
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condition:
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all of them
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}
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rule HTA_Embedded {
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meta:
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description = "Detects an embedded HTA file"
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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://twitter.com/msftmmpc/status/877396932758560768"
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date = "2017-06-21"
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score = 50
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hash1 = "ca7b653cf41e980c44311b2cd701ed666f8c1dbc"
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id = "04d4c718-9dd6-5528-8712-61c9f2a16139"
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strings:
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$s1 = "<hta:application windowstate=\"minimize\"/>"
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condition:
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$s1 and not $s1 in (0..50000)
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}
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