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VOLEXITY_Apt_Malware_Js_Longtale

Detection for LONGTALE, a chrome extension malware.

APT / threat actorVolexity threat-intelBSD 2-Clause LicenseCompiles with YARA-X
Author
threatintel@volexity.com
Date
2026-09-08
Score / Quality
75 / 80

What this rule detects

Detection for LONGTALE, a chrome extension malware.

It defines 13 patterns (13 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

apt-malware-js-longtale.yarBSD 2-Clause License
rule VOLEXITY_Apt_Malware_Js_Longtale : LONGTALE JUNGLEBAMBOO FILE MEMORY
{
	meta:
		description = "Detection for LONGTALE, a chrome extension malware."
		author = "threatintel@volexity.com"
		id = "b97eaf48-8c4e-5fea-af7c-d1f559d334af"
		date = "2026-09-08"
		modified = "2026-09-08"
		reference = "https://github.com/volexity/threat-intel"
		source_url = "https://github.com/volexity/threat-intel/blob/3a9d0b52459877ee866a9a0ba06e60059b778c77/2026/2026-09-09 Chrome/rules.yar#L1-L37"
		license_url = "https://github.com/volexity/threat-intel/blob/3a9d0b52459877ee866a9a0ba06e60059b778c77/LICENSE.txt"
		hash = "5eb5645511b00e4f4d73125654eeb3a3930fcf09c65685dc7f03f725331492e3"
		logic_hash = "194266bc6710943a421f1e3a65cf5345b061edd3777a9f555fa435fef41e7baa"
		score = 75
		quality = 80
		tags = "LONGTALE, JUNGLEBAMBOO, FILE, MEMORY"
		os = "all"
		os_arch = "all"
		scan_context = "file,memory"
		severity = "critical"
		report1 = "TIB-20260908B"
		license = "See license at https://github.com/volexity/threat-intel/blob/main/LICENSE.txt"
		rule_id = 13428
		version = 2

	strings:
		$f1 = "getPublicIP" ascii
		$f2 = "captureCookies" ascii
		$f3 = "recordFetch" ascii
		$f4 = "injectRecorder" ascii
		$f5 = "captureVisibleTab" ascii
		$f6 = "buildIngestPayload" ascii
		$case1 = "SET_KEYWORDS"
		$case2 = "GET_KEYWORDS"
		$case3 = "SCREENSHOT_NOW"
		$case4 = "FETCH_HISTORY"
		$case5 = "CAPTURE_STORAGE"
		$case6 = "CAPTURE_COOKIES"
		$case7 = "TOGGLE_RECORDING"

	condition:
		all of ( $f* ) or all of ( $case* )
}

Strings (13 patterns)

IdentifierTypeValueModifiers
$f1text"getPublicIP"ascii
$f2text"captureCookies"ascii
$f3text"recordFetch"ascii
$f4text"injectRecorder"ascii
$f5text"captureVisibleTab"ascii
$f6text"buildIngestPayload"ascii
$case1text"SET_KEYWORDS"
$case2text"GET_KEYWORDS"
$case3text"SCREENSHOT_NOW"
$case4text"FETCH_HISTORY"
$case5text"CAPTURE_STORAGE"
$case6text"CAPTURE_COOKIES"
$case7text"TOGGLE_RECORDING"

Condition

all of ( $f* ) or all of ( $case* )

In plain words (Heuristic)

  • All patterns in ( $f* ) must match.
  • All patterns in ( $case* ) must match.

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References

Sample hashes

Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).

  • 5eb5645511b00e4f4d73125654eeb3a3930fcf09c65685dc7f03f725331492e3

Licence & attribution

Author: threatintel@volexity.com

Source repository: Volexity threat-intel @ 3a9d0b5245

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

“See license at https://github.com/volexity/threat-intel/blob/main/LICENSE.txt”

Copyright notice: Copyright 2022 by Volexity, Inc.

Original rule

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

Rule id: b97eaf48-8c4e-5fea-af7c-d1f559d334af

Metadata

osall
os_archall
scan_contextfile,memory
severitycritical
report1TIB-20260908B
rule_id13428
version2

Tags:LONGTALEJUNGLEBAMBOOFILEMEMORY