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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_APT_MAL_CN_Wocao_Webshell_Index_Jsp

Strings from the index.jsp socket tunnel

APT / threat actorSignature Base (Florian Roth / Nextron)Detection Rule License 1.1Compiles with YARA-X
Author
Fox-IT SRT
Date
2019-12-20
Modified
2023-12-05
Score / Quality
75 / 85

What this rule detects

Strings from the index.jsp socket tunnel

It defines 5 patterns (5 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
apt-mal-cn-wocao-webshell-index-jsp.yarDetection Rule License 1.1
rule SIGNATURE_BASE_APT_MAL_CN_Wocao_Webshell_Index_Jsp
{
	meta:
		description = "Strings from the index.jsp socket tunnel"
		author = "Fox-IT SRT"
		id = "9c226ccd-6c69-523c-bca4-371e55274667"
		date = "2019-12-20"
		modified = "2023-12-05"
		reference = "https://www.fox-it.com/en/news/whitepapers/operation-wocao-shining-a-light-on-one-of-chinas-hidden-hacking-groups/"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/apt_op_wocao.yar#L337-L353"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "870dad9fb5456f8edbd9f3c2d0b8764cf1143399626ce4df53c93919bcb1a0cb"
		score = 75
		quality = 85
		tags = ""

	strings:
		$x1 = "X-CMD"
		$x2 = "X-STATUS"
		$x3 = "X-TARGET"
		$x4 = "X-ERROR"
		$a = "out.print(\"All seems fine.\");"

	condition:
		all of ( $x* ) and $a
}

Strings (5 patterns)

IdentifierTypeValueModifiers
$x1text"X-CMD"
$x2text"X-STATUS"
$x3text"X-TARGET"
$x4text"X-ERROR"
$atext"out.print(\"All seems fine.\");"

Condition

all of ( $x* ) and $a

In plain words (Heuristic)

  • All patterns in ( $x* ) must match.
  • Pattern $a must be present.

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References

Licence & attribution

Author: Fox-IT SRT

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: 9c226ccd-6c69-523c-bca4-371e55274667

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