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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_APT_MAL_CN_Wocao_Timeliner_Bin

Timeliner utility

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

Timeliner utility

It defines 7 patterns (7 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
apt-mal-cn-wocao-timeliner-bin.yarDetection Rule License 1.1
rule SIGNATURE_BASE_APT_MAL_CN_Wocao_Timeliner_Bin
{
	meta:
		description = "Timeliner utility"
		author = "Fox-IT SRT"
		id = "3d81a4ae-0ce0-5867-ac93-a706556481b6"
		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#L195-L213"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "c3a8cddc34134faaab93ee0df0086604e4a7b031530dd65e2e8dab705483305b"
		score = 75
		quality = 85
		tags = ""

	strings:
		$a = "[+] Work completed." ascii wide
		$b = "[-] Create a new file failed." ascii wide
		$c = "[-] This is not a correct path." ascii wide
		$d = "%s [TargetPath] <Num> <SavePath>" ascii wide
		$e = "D\t%ld\t%ld\t%ld\t%d\t%d\t%s\t" ascii wide
		$f = "D\t%ld\t%ld\t%ld\t-1\t%d\t%s\t" ascii wide
		$g = "%s\t%ld\t%ld\t%ld\t%I64d\t%d\t%s\t%s" ascii wide

	condition:
		1 of them
}

Strings (7 patterns)

IdentifierTypeValueModifiers
$atext"[+] Work completed."ascii wide
$btext"[-] Create a new file failed."ascii wide
$ctext"[-] This is not a correct path."ascii wide
$dtext"%s [TargetPath] <Num> <SavePath>"ascii wide
$etext"D\t%ld\t%ld\t%ld\t%d\t%d\t%s\t"ascii wide
$ftext"D\t%ld\t%ld\t%ld\t-1\t%d\t%s\t"ascii wide
$gtext"%s\t%ld\t%ld\t%ld\t%I64d\t%d\t%s\t%s"ascii wide

Condition

1 of them

In plain words (Heuristic)

  • At least 1 patterns in the rule must match.

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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: 3d81a4ae-0ce0-5867-ac93-a706556481b6

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