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Detects a dropper from a CAB file mentioned in the article

yara HIGH 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: 2026-05-06T11:00:00Z · Confidence: medium

Hunt Hypothesis

A dropper is being executed from a CAB file, which is commonly used to package malicious payloads for deployment. SOC teams should proactively hunt for this behavior in Azure Sentinel to identify and mitigate potential malware distribution and lateral movement tactics.

YARA Rule

rule Mal_Dropper_httpEXE_from_CAB : Dropper {
	meta:
		description = "Detects a dropper from a CAB file mentioned in the article"
		author = "Florian Roth"
		reference = "https://goo.gl/13Wgy1"
		date = "2016-05-25"
		score = 60
		hash1 = "9e7e5f70c4b32a4d5e8c798c26671843e76bb4bd5967056a822e982ed36e047b"
	strings:
		$s1 = "029.Hdl" fullword ascii
		$s2 = "http.exe" fullword ascii
	condition:
		( uint16(0) == 0x5a4d and filesize < 1000KB and ( all of ($s*) ) )
}

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/cve_rules/CVE-2015-2545.yar