DNS Query To Katz Stealer Domains

SIGMA detection rule by Swachchhanda Shrawan Poudel (Nextron Systems) · NOASSERTION

Detects DNS queries to domains associated with Katz Stealer malware. Katz Stealer is a malware variant that is known to be used for stealing sensitive information from compromised systems. In Enterprise environments, DNS queries to these domains may indicate potential malicious activity or compromise.

title: DNS Query To Katz Stealer Domains
id: 9c3d6e32-f4c8-4d73-8b8f-95c3b383a13c
related:
    - id: 6b0c762f-0e1b-435f-a829-5943b08fe36a
      type: similar
status: experimental
description: |
    Detects DNS queries to domains associated with Katz Stealer malware.
    Katz Stealer is a malware variant that is known to be used for stealing sensitive information from compromised systems.
    In Enterprise environments, DNS queries to these domains may indicate potential malicious activity or compromise.
references:
    - Internal Research
author: Swachchhanda Shrawan Poudel (Nextron Systems)
date: 2025-05-22
tags:
    - attack.command-and-control
    - attack.t1071.004
    - detection.emerging-threats
logsource:
    product: windows
    category: dns_query
detection:
    selection:
        QueryName|contains:
            - 'katz-panel.com'
            - 'katz-stealer.com'
            - 'katzstealer.com'
            - 'twist2katz.com'
    condition: selection
falsepositives:
    - Unlikely
level: high

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

9b8cb406-1d75-4fea-b0ed-eb16e181ff0a

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

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Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

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What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

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