Skip to content
yararules.org
Menu

YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_WEBSHELL_PAS_Webshell_Ziparchivefile

Detects an archive file created by P.A.S. for download operation

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

What this rule detects

Detects an archive file created by P.A.S. for download operation

It defines 1 patterns (1 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
webshell-pas-webshell-ziparchivefile.yarDetection Rule License 1.1
rule SIGNATURE_BASE_WEBSHELL_PAS_Webshell_Ziparchivefile
{
	meta:
		description = "Detects an archive file created by P.A.S. for download operation"
		author = "FR/ANSSI/SDO (modified by Florian Roth)"
		id = "081cc65b-e51c-59fc-a518-cd986e8ee2f7"
		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#L30-L42"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "c15e7022f45ec211ba635d6cd31bab16f4fb0d3038fb19d5765e0f751c14a826"
		score = 80
		quality = 85
		tags = ""

	strings:
		$s1 = "Archive created by P.A.S. v."

	condition:
		$s1
}

Strings (1 patterns)

IdentifierTypeValueModifiers
$s1text"Archive created by P.A.S. v."

Condition

$s1

In plain words (Heuristic)

  • Pattern $s1 must be present.

Test this rule in your browser

Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.

Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

Open in editor

References

Licence & attribution

Author: FR/ANSSI/SDO (modified by Florian Roth)

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: 081cc65b-e51c-59fc-a518-cd986e8ee2f7

Related rules