YARA · ESET malware-ioc

ESET_Kobalos_Ssh_Credential_Stealer

Kobalos SSH credential stealer seen in OpenSSH client

MalwareESET malware-iocBSD 2-Clause LicenseCompiles with YARA-X

Author: Marc-Etienne M.Léveillé
Date: 2020-11-02
Modified: 2021-02-01
Score / Quality: 75 / 80

What this rule detects

Kobalos SSH credential stealer seen in OpenSSH client

It defines 1 patterns (1 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar

kobalos-ssh-credential-stealer.yarBSD 2-Clause License

rule ESET_Kobalos_Ssh_Credential_Stealer
{
	meta:
		description = "Kobalos SSH credential stealer seen in OpenSSH client"
		author = "Marc-Etienne M.Léveillé"
		id = "b1fc5163-de48-57fc-8ae7-1f2be6c64d8a"
		date = "2020-11-02"
		modified = "2021-02-01"
		reference = "https://github.com/eset/malware-ioc/"
		source_url = "https://github.com/eset/malware-ioc/blob/17baf44964a77368e9149f4f593eb098beddf1c5/kobalos/kobalos.yar#L58-L73"
		license_url = "https://github.com/eset/malware-ioc/blob/17baf44964a77368e9149f4f593eb098beddf1c5/LICENSE"
		logic_hash = "be238f5c2cc976a5638584a8c0fc580f2076735aadfe374e8d4162ba723bce10"
		score = 75
		quality = 80
		tags = ""
		license = "BSD 2-Clause"
		version = "1"

	strings:
		$ = "user: %.128s host: %.128s port %05d user: %.128s password: %.128s"

	condition:
		any of them
}

Strings (1 patterns)

Identifier	Type	Value	Modifiers
$	text	"user: %.128s host: %.128s port %05d user: %.128s password: %.128s"

Condition

any of them

In plain words (Heuristic)

At least one pattern in the rule must match.

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References

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

Licence & attribution

Author: Marc-Etienne M.Léveillé

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: b1fc5163-de48-57fc-8ae7-1f2be6c64d8a

Metadata

version	1

ESET_Kobalos
MalwareESET malware-ioc· Marc-Etienne M.Léveillé· 2020-11-02