Sigma rule: DNS Query To Katz Stealer Domains - Network

Rule

Title

DNS Query To Katz Stealer Domains - Network

Status

experimental

Level

high

Author

Swachchhanda Shrawan Poudel (Nextron Systems)

Date

2025-05-22

File

rules-emerging-threats/2025/Malware/Katz-Stealer/net_dns_katz_stealer_domain.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

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.

Log source

category

dns

Detection

selection:
    query|contains:
        - 'katz-panel.com'
        - 'katz-stealer.com'
        - 'katzstealer.com'
        - 'twist2katz.com'
condition: selection

False positives (as the rule lists them)

• Unlikely

Tags

• attack.command-and-control
• attack.t1071.004
• detection.emerging-threats

MITRE ATT&CK ids this rule names

• T1071.004

Related rules

• 9c3d6e32-f4c8-4d73-8b8f-95c3b383a13c (similar)

References

• Internal research

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2025/Malware/Katz-Stealer/net_dns_katz_stealer_domain.yml