Potential Devil Bait Malware Reconnaissance

calendar Apr 1, 2024 · attack.defense_evasion attack.t1218 detection.emerging_threats  ·
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Detects specific process behavior observed with Devil Bait samples

Sigma rule (View on GitHub)

 1title: Potential Devil Bait Malware Reconnaissance
 2id: e8954be4-b2b8-4961-be18-da1a5bda709c
 3related:
 4    - id: 8e0bb260-d4b2-4fff-bb8d-3f82118e6892
 5      type: derived
 6status: test
 7description: Detects specific process behavior observed with Devil Bait samples
 8references:
 9    - https://www.ncsc.gov.uk/static-assets/documents/malware-analysis-reports/devil-bait/NCSC-MAR-Devil-Bait.pdf
10    - https://www.virustotal.com/gui/file/fa71eee906a7849ba3f4bab74edb577bd1f1f8397ca428591b4a9872ce1f1e9b/behavior
11author: Nasreddine Bencherchali (Nextron Systems), NCSC (Idea)
12date: 2023/05/15
13tags:
14    - attack.defense_evasion
15    - attack.t1218
16    - detection.emerging_threats
17logsource:
18    category: process_creation
19    product: windows
20detection:
21    selection_redirect:
22        ParentImage|endswith: '\wscript.exe'
23        Image|endswith: '\cmd.exe'
24        CommandLine|contains: '>>%APPDATA%\Microsoft\'
25        CommandLine|endswith:
26            - '.xml'
27            - '.txt'
28    selection_recon_cmd:
29        CommandLine|contains:
30            # Taken from a6f9043627f8be2452153b5dbf6278e9b91763c3b5c2aea537a859e0c8c6b504
31            # If you find samples using other commands please add them
32            - 'dir'
33            - 'ipconfig /all'
34            - 'systeminfo'
35            - 'tasklist'
36    condition: all of selection_*
37falsepositives:
38    - Unlikely
39level: high

References

  • %PDF-1.7 %µµµµ 1 0 obj /Metadata 886 0 R/ViewerPreferences 887 0 R>> endobj 2 0 obj endobj 3 0 obj /ExtGState /XObject /ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 594.96 842.04] /Cont...


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