YARA · ESET malware-ioc

ESET_Invisimole_Blob_PRIVATE

Detects InvisiMole blobs by magic values

MalwareInvisimoleESET malware-iocBSD 2-Clause LicenseCompiles with YARA-Xprivate rule

Author: ESET Research
Date: 2021-05-17
Score / Quality: 75 / 80

What this rule detects

Detects InvisiMole blobs by magic values

Associated malware family: Invisimole.

It defines 4 patterns (0 text, 4 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar

invisimole-blob-private.yarBSD 2-Clause License

private rule ESET_Invisimole_Blob_PRIVATE
{
	meta:
		description = "Detects InvisiMole blobs by magic values"
		author = "ESET Research"
		id = "6a179d91-50f1-5400-b141-0f162efd2431"
		date = "2021-05-17"
		modified = "2021-05-17"
		reference = "https://github.com/eset/malware-ioc/"
		source_url = "https://github.com/eset/malware-ioc/blob/17baf44964a77368e9149f4f593eb098beddf1c5/invisimole/invisimole.yar#L34-L52"
		license_url = "https://github.com/eset/malware-ioc/blob/17baf44964a77368e9149f4f593eb098beddf1c5/LICENSE"
		logic_hash = "8bddaf874da58fbe6362498f8979b511f39531fe2b98d4be8c099bdafb6d0067"
		score = 75
		quality = 80
		tags = ""
		license = "BSD 2-Clause"
		version = "1"

	strings:
		$magic_old_32 = {F9 FF D0 DE}
		$magic_old_64 = {64 FF D0 DE}
		$magic_new_32 = {86 DA 11 CE}
		$magic_new_64 = {64 DA 11 CE}

	condition:
		($magic_old_32 at 0 ) or ( $magic_old_64 at 0 ) or ( $magic_new_32 at 0 ) or ( $magic_new_64 at 0 )
}

Strings (4 patterns)

Identifier	Type	Value
$magic_old_32	hex	{F9 FF D0 DE}
$magic_old_64	hex	{64 FF D0 DE}
$magic_new_32	hex	{86 DA 11 CE}
$magic_new_64	hex	{64 DA 11 CE}

Condition

($magic_old_32 at 0 ) or ( $magic_old_64 at 0 ) or ( $magic_new_32 at 0 ) or ( $magic_new_64 at 0 )

In plain words (Heuristic)

Pattern $magic_old_32 must be found at offset 0.
Pattern $magic_old_64 must be found at offset 0.
Pattern $magic_new_32 must be found at offset 0.
Pattern $magic_new_64 must be found at offset 0.

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References

https://github.com/eset/malware-ioc/

Licence & attribution

Author: ESET Research

Source repository: ESET malware-ioc @ 17baf44964

Licence: BSD 2-Clause License (stated in the rule's own meta)

“BSD 2-Clause”

Original rule

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

Rule id: 6a179d91-50f1-5400-b141-0f162efd2431

Metadata

version	1

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