YARA · ESET malware-ioc

ESET_Apt_Windows_TA410_Tendyron_Installer

TA410 Tendyron Installer

APT / threat actorESET malware-iocBSD 2-Clause LicenseCompiles with YARA-X

Author: ESET Research
Date: 2020-12-09
Modified: 2022-04-27
Score / Quality: 75 / 80

What this rule detects

TA410 Tendyron Installer

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

Summary generated from the rule's metadata and condition.

Rule source

Download .yar

apt-windows-ta410-tendyron-installer.yarBSD 2-Clause License

rule ESET_Apt_Windows_TA410_Tendyron_Installer
{
	meta:
		description = "TA410 Tendyron Installer"
		author = "ESET Research"
		id = "95ccad1c-99fb-5d38-aec0-650db3e06b35"
		date = "2020-12-09"
		modified = "2022-04-27"
		reference = "https://github.com/eset/malware-ioc/"
		source_url = "https://github.com/eset/malware-ioc/blob/17baf44964a77368e9149f4f593eb098beddf1c5/ta410/ta410.yar#L55-L73"
		license_url = "https://github.com/eset/malware-ioc/blob/17baf44964a77368e9149f4f593eb098beddf1c5/LICENSE"
		logic_hash = "9c3afb924747614f27c31cf2c3d98f4932a9d11597a3ac94263bf93be02801da"
		score = 75
		quality = 80
		tags = ""
		license = "BSD 2-Clause"
		version = "1"

	strings:
		$s1 = "Tendyron" wide
		$s2 = "OnKeyToken_KEB.dll" wide
		$s3 = "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run" wide
		$s4 = "Global\\8D32CCB321B2"
		$s5 = "\\RTFExploit\\"

	condition:
		int16 ( 0 ) == 0x5A4D and 3 of them
}

Strings (5 patterns)

Identifier	Type	Value	Modifiers
$s1	text	"Tendyron"	wide
$s2	text	"OnKeyToken_KEB.dll"	wide
$s3	text	"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run"	wide
$s4	text	"Global\\8D32CCB321B2"
$s5	text	"\\RTFExploit\\"

Condition

int16 ( 0 ) == 0x5A4D and 3 of them

In plain words (Heuristic)

At least 3 patterns in the rule must match.

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References

https://github.com/eset/malware-ioc/

Licence & attribution

Author: ESET Research

Source repository: ESET malware-ioc @ 17baf44964

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

“BSD 2-Clause”

Original rule

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

Rule id: 95ccad1c-99fb-5d38-aec0-650db3e06b35

Metadata

version	1

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