YARA · SEKOIA.IO Community

SEKOIA_Apt_Kimsuky_Sharpext_Compromised_Securepreferences

Detects compromised Chrome SecurePreferences file

APT / threat actorKimsukySEKOIA.IO CommunityDetection Rule License 1.1Compiles with YARA-X

Author: Sekoia.io
Date: 2022-07-29
Modified: 2024-12-19
Score / Quality: 75 / 80

What this rule detects

Detects compromised Chrome SecurePreferences file

Associated malware family: Kimsuky.

It defines 3 patterns (3 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar

apt-kimsuky-sharpext-compromised-securepreferences.yarDetection Rule License 1.1

rule SEKOIA_Apt_Kimsuky_Sharpext_Compromised_Securepreferences
{
	meta:
		description = "Detects compromised Chrome SecurePreferences file"
		author = "Sekoia.io"
		id = "aeda5d15-82e1-4ffc-8252-1eb4fc78d024"
		date = "2022-07-29"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_kimsuky_sharpext_compromised_securepreferences.yar#L1-L17"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "662358fdb4c4cfa9984d06e391ade52e1c7a3d7b78724aea4fb0d6035fe2e7b2"
		score = 75
		quality = 80
		tags = ""
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "\"devtools\", \"tabs\", \"webNavigation\", \"webRequest\", \"webRequestBlocking\""
		$ = "AppData\\\\Roaming"
		$ = "https://*/*"

	condition:
		all of them
}

Strings (3 patterns)

Identifier	Type	Value
$	text	"\"devtools\", \"tabs\", \"webNavigation\", \"webRequest\", \"webRequestBlocking\""
$	text	"AppData\\\\Roaming"
$	text	"https:///"

Condition

all of them

In plain words (Heuristic)

All patterns in the rule must match.

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

https://github.com/SEKOIA-IO/Community

Licence & attribution

Author: Sekoia.io

Source repository: SEKOIA.IO Community @ a438a5901a

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: aeda5d15-82e1-4ffc-8252-1eb4fc78d024

Metadata

version	1.0
classification	TLP:CLEAR

SEKOIA_Apt_Kimsuky_Fpspy
APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-09-27
SEKOIA_Apt_Kimsuky_Klogexe
APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-09-27
SEKOIA_Apt_Kimsuky_Powershell
APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-09-23
SEKOIA_Apt_Kimsuky_Powershell_Dropper_Strings
APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-06-11
SEKOIA_Apt_Kimsuky_Toddlershark_Obfuscated
APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-03-06
SEKOIA_Apt_Kimsuky_Toddlershark_Strings
APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-03-06
SEKOIA_Apt_Kimsuky_Validator_Strings
APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-06-11
SEKOIA_Apt_Kimsuky_Vbs
APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-09-23

More Kimsuky rules