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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_Hvs_APT37_RAT_Loader

BLINDINGCAN RAT loader named iconcash.db used by APT37

MalwareBlindingcanSignature Base (Florian Roth / Nextron)Detection Rule License 1.1Compiles with YARA-X
Author
Marc Stroebel
Date
2020-12-15
Modified
2023-12-05
Score / Quality
75 / 85

What this rule detects

BLINDINGCAN RAT loader named iconcash.db used by APT37

Associated malware family: Blindingcan.

Targets: Windows PE.

It has no patterns: the condition alone decides (modules, file properties or other rules). YARA modules used: pe.

Summary generated from the rule's metadata and condition.

Rule source

Download .yar

Includes the imports needed to compile it on its own.

hvs-apt37-rat-loader.yarDetection Rule License 1.1
import "pe"

rule SIGNATURE_BASE_Hvs_APT37_RAT_Loader
{
	meta:
		description = "BLINDINGCAN RAT loader named iconcash.db used by APT37"
		author = "Marc Stroebel"
		id = "6c3e8465-d607-59bf-85fc-5abbef71fb1c"
		date = "2020-12-15"
		modified = "2023-12-05"
		reference = "https://us-cert.cisa.gov/ncas/analysis-reports/ar20-232a"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/apt_lazarus_dec20.yar#L52-L65"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		hash = "b70e66d387e42f5f04b69b9eb15306036702ab8a50b16f5403289b5388292db9"
		logic_hash = "241f2683adc29e8aca30ae24278f3703fef0fed6b276dae488fdb32c167af1c9"
		score = 75
		quality = 85
		tags = ""
		license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"

	condition:
		(pe.version_info [ "OriginalFilename" ] contains "MFC_DLL.dll" ) and ( pe.exports ( "SMain" ) and pe.exports ( "SMainW" ) )
}

Condition

(pe.version_info [ "OriginalFilename" ] contains "MFC_DLL.dll" ) and ( pe.exports ( "SMain" ) and pe.exports ( "SMainW" ) )

In plain words (Heuristic)

  • Uses the pe module.
  • Checks exported functions or the DLL name.

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References

Sample hashes

Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).

  • b70e66d387e42f5f04b69b9eb15306036702ab8a50b16f5403289b5388292db9

Licence & attribution

Author: Marc Stroebel

Source repository: Signature Base (Florian Roth / Nextron) @ 94a1c48d7a

Licence: Detection Rule License 1.1 (stated in the rule's own meta)

“Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE”

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: 6c3e8465-d607-59bf-85fc-5abbef71fb1c

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