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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_APT_MAL_Sandworm_Exaramel_Task_Names

Detects names of the tasks received from the CC server in Exaramel malware

APT / threat actorExaramelSignature Base (Florian Roth / Nextron)Detection Rule License 1.1Compiles with YARA-X
Author
FR/ANSSI/SDO
Date
2021-02-15
Modified
2024-05-25
Score / Quality
80 / 85

What this rule detects

Detects names of the tasks received from the CC server in Exaramel malware

Associated malware family: Exaramel.

It defines 8 patterns (8 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
apt-mal-sandworm-exaramel-task-names.yarDetection Rule License 1.1
rule SIGNATURE_BASE_APT_MAL_Sandworm_Exaramel_Task_Names
{
	meta:
		description = "Detects names of the tasks received from the CC server in Exaramel malware"
		author = "FR/ANSSI/SDO"
		id = "185f2f3b-bf5c-54af-bca2-400d08bf9c91"
		date = "2021-02-15"
		modified = "2024-05-25"
		reference = "https://www.cert.ssi.gouv.fr/uploads/CERTFR-2021-CTI-005.pdf"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/apt_sandworm_centreon.yar#L148-L167"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "193482da1e2b9509fa9c65d46edc56057f7b5d44b7408d918d4a9cbb60736dab"
		score = 80
		quality = 85
		tags = ""

	strings:
		$ = "App.Delete"
		$ = "App.SetServer"
		$ = "App.SetProxy"
		$ = "App.SetTimeout"
		$ = "App.Update"
		$ = "IO.ReadFile"
		$ = "IO.WriteFile"
		$ = "OS.ShellExecute"

	condition:
		all of them
}

Strings (8 patterns)

IdentifierTypeValueModifiers
$text"App.Delete"
$text"App.SetServer"
$text"App.SetProxy"
$text"App.SetTimeout"
$text"App.Update"
$text"IO.ReadFile"
$text"IO.WriteFile"
$text"OS.ShellExecute"

Condition

all of them

In plain words (Heuristic)

  • All patterns in the rule must match.

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References

Licence & attribution

Author: FR/ANSSI/SDO

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

Licence: Detection Rule License 1.1 (repository licence)

Original rule

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

Rule id: 185f2f3b-bf5c-54af-bca2-400d08bf9c91

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