Kapeka Backdoor Loaded Via Rundll32.EXE

 1title: Kapeka Backdoor Loaded Via Rundll32.EXE
 2id: a7e6b1f9-8d2c-4f1e-9a7d-63e4c8a2bf4c
 3status: experimental
 4description: |
 5    Detects the Kapeka Backdoor binary being loaded by rundll32.exe.
 6    The Kapeka loader drops a backdoor, which is a DLL with the '.wll' extension masquerading as a Microsoft Word Add-In.    
 7references:
 8    - https://labs.withsecure.com/publications/kapeka
 9    - https://app.any.run/tasks/1efb3ed4-cc0f-4690-a0ed-24516809bc72/
10author: Swachchhanda Shrawan Poudel
11date: 2024-07-03
12tags:
13    - attack.execution
14    - attack.t1204.002
15    - attack.defense-evasion
16    - attack.t1218.011
17logsource:
18    category: image_load
19    product: windows
20detection:
21    selection:
22        Image|endswith: '\rundll32.exe'
23        ImageLoaded|contains:
24            - ':\ProgramData'
25            - '\AppData\Local\'
26        ImageLoaded|re: '[a-zA-Z]{5,6}\.wll'
27    condition: selection
28falsepositives:
29    - Unknown
30level: high

References

• Kapeka: A novel backdoor spotted in Eastern Europe

  

  This report provides an in-depth technical analysis of the backdoor and its capabilities, and analyzes the connection between Kapeka and Sandworm group. The purpose of this report is to raise awareness amongst businesses, governments, and the broader security community. WithSecure has engaged governments and select customers with advanced copies of this report. In addition to the report, we are releasing several artifacts developed as a result of our research, including a registry-based & hardcoded configuration extractor, a script to decrypt and emulate the backdoor’s network communication, and as might be expected, a list of indicators of compromise, YARA rules, and MITRE ATT&CK mapping

  
  Read More

• Analysis bd07fb1e9b4768e7202de6cc454c78c6891270af02085c51fce5539db1386c3f (MD5: 50B5582904FE34451F5CB2362E11CB24) Malicious activity - Interactive analysis ANY.RUN

  

  Interactive malware hunting service. Live testing of most type of threats in any environments. No installation and no waiting necessary.

  
  Read More

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