31 lines
1.1 KiB
Text
31 lines
1.1 KiB
Text
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import "pe"
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rule SUSP_VCRuntime_Sideloading_Indicators_Aug23 {
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meta:
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description = "Detects indicators of .NET based malware sideloading as VCRUNTIME140 with .NET DLL imports"
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author = "Jonathan Peters"
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date = "2023-08-30"
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hash = "b4bc73dfe9a781e2fee4978127cb9257bc2ffd67fc2df00375acf329d191ffd6"
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score = 75
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id = "00400122-1343-5051-af31-880a3ef1745d"
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condition:
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(filename == "VCRUNTIME140.dll" or filename == "vcruntime140.dll")
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and pe.imports("mscoree.dll", "_CorDllMain")
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}
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// rule SUSP_VCRuntime_Sideloading_Indicators_1_Aug23 {
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// meta:
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// description = "Detects indicators of .NET based malware sideloading as an unsigned VCRUNTIME140"
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// author = "Jonathan Peters"
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// date = "2023-08-30"
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// hash = "b4bc73dfe9a781e2fee4978127cb9257bc2ffd67fc2df00375acf329d191ffd6"
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// score = 75
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// strings:
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// $fp1 = "Wine builtin DLL" ascii
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// condition:
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// (filename == "VCRUNTIME140.dll" or filename == "vcruntime140.dll")
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// and not pe.number_of_signatures == 0
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// and not pe.signatures[0].issuer contains "Microsoft Corporation"
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// and not $fp1
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// }
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