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File manipulation actions associated with CRASHOVERRIDE wiper

yara LOW Yara-Rules
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This rule was pulled from an open-source repository and enriched with AI. Validate in a test environment before deploying to production.
View original rule at Yara-Rules →
Retrieved: 2026-05-21T11:00:00Z · Confidence: medium

Hunt Hypothesis

Adversaries may manipulate files as part of the CRASHOVERRIDE wiper campaign to exfiltrate data or disrupt systems. SOC teams should proactively hunt for these file manipulation patterns in Azure Sentinel to identify potential wiper activity early and mitigate impact.

YARA Rule

rule dragos_crashoverride_wiperFileManipulation {
    meta:
		description = "File manipulation actions associated with CRASHOVERRIDE wiper"
        author = "Dragos Inc"
		reference = "https://dragos.com/blog/crashoverride/CrashOverride-01.pdf"
    strings:
        $s0 = { 6a 00 68 80 00 00 00 6a 03 6a 00 6a 02 8b f9 68 00 00 00 40 57 ff 15 1c ?? ?? ?? 8b d8 }
        $s2 = { 6a 00 50 57 56 53 ff 15 4c ?? ?? ?? 56 }
    condition:
        all of them
}

Deployment Notes

This YARA rule can be deployed in the following contexts:

This rule contains 2 string patterns in its detection logic.

References

False Positive Guidance

Original source: https://github.com/Yara-Rules/rules/blob/main/malware/APT_CrashOverride.yar