Katz Stealer DLL Loaded

Detects loading of DLLs associated with Katz Stealer malware 2025 variants. Katz Stealer is a malware variant that is known to be used for stealing sensitive information from compromised systems. The process that loads these DLLs are very likely to be malicious.

Sigma rule (View on GitHub)

 1title: Katz Stealer DLL Loaded
 2id: e6c7ab7c-c79d-4b84-b913-b2ec3f8e8a98
 3status: experimental
 4description: |
 5    Detects loading of DLLs associated with Katz Stealer malware 2025 variants.
 6    Katz Stealer is a malware variant that is known to be used for stealing sensitive information from compromised systems.
 7    The process that loads these DLLs are very likely to be malicious.    
 8references:
 9    - Internal Research
10author: Swachchhanda Shrawan Poudel (Nextron Systems)
11date: 2025-05-22
12tags:
13    - attack.execution
14    - attack.t1129
15    - detection.emerging-threats
16logsource:
17    category: image_load
18    product: windows
19detection:
20    selection:
21        ImageLoaded|endswith:
22            - '\katz_ontop.dll'
23            - '\AppData\Local\Temp\received_dll.dll'
24    condition: selection
25falsepositives:
26    - Unlikely
27level: high

References

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