Windows DNS Queries to Katz Stealer-Related Domains

Alerts on Windows DNS queries to domains associated with Katz Stealer malware infrastructure.

FreeReviewedSigma · High · v5

Product: windows
Category: dns_query
Author: Swachchhanda Shrawan Poudel (Nextron Systems) (SigmaHQ), DRL 1.1
Published: 2025-05-22
Updated: 2026-07-31

ATT&CK techniques

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1071.004DNS
Exfiltration
Impact

What it detects

This rule matches Windows DNS query events where the queried domain name contains Katz Stealer-related domains, including katz-panel.com, katz-stealer.com, katzstealer.com, and twist2katz.com. Such queries can indicate attacker command-and-control or staging infrastructure activity involving Katz Stealer. It relies on DNS query telemetry that records the DNS query name and allows substring matching to those specific domains.

Reporting behind it

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Windows DNS Queries to Katz Stealer-Related Domains

Pivot detection · T1071.004 · 9 related

Changelog

v5
Candidate ingested via manual entry.2026-07-31
v4
Candidate ingested via manual entry.2026-07-31
v3
Candidate ingested via manual entry.2026-07-31
v2
Candidate ingested via manual entry.2026-07-31
v1
No changelog recorded for this version.2026-07-30

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

windows-dns-queries-to-known-katz-stealer-domains-9c3d6e32

title: Windows DNS Queries to Katz Stealer-Related Domains
id: 3534301e-89fa-4496-af92-d04843e4103e
related:
  - id: 6b0c762f-0e1b-435f-a829-5943b08fe36a
    type: similar
  - id: 9c3d6e32-f4c8-4d73-8b8f-95c3b383a13c
    type: derived
status: experimental
description: This rule matches Windows DNS query events where the queried domain name contains Katz Stealer-related domains, including katz-panel.com, katz-stealer.com, katzstealer.com, and twist2katz.com. Such queries can indicate attacker command-and-control or staging infrastructure activity involving Katz Stealer. It relies on DNS query telemetry that records the DNS query name and allows substring matching to those specific domains.
references:
  - Internal Research
  - https://github.com/SigmaHQ/sigma/blob/master/rules-emerging-threats/2025/Malware/Katz-Stealer/dns_query_win_katz_stealer_domain.yml
author: Swachchhanda Shrawan Poudel (Nextron Systems), Huntrule Team
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
license: DRL-1.1

Convert

This rule as a query you can run. Uses no unlock credit.

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