Suspicious Shells Spawn by Java Utility Keytool

calendar Dec 1, 2023 · attack.initial_access attack.persistence attack.privilege_escalation  ·
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Detects suspicious shell spawn from Java utility keytool process (e.g. adselfservice plus exploitation)

Sigma rule (View on GitHub)

 1title: Suspicious Shells Spawn by Java Utility Keytool
 2id: 90fb5e62-ca1f-4e22-b42e-cc521874c938
 3status: test
 4description: Detects suspicious shell spawn from Java utility keytool process (e.g. adselfservice plus exploitation)
 5references:
 6    - https://redcanary.com/blog/intelligence-insights-december-2021
 7    - https://www.synacktiv.com/en/publications/how-to-exploit-cve-2021-40539-on-manageengine-adselfservice-plus.html
 8author: Andreas Hunkeler (@Karneades)
 9date: 2021/12/22
10modified: 2023/01/21
11tags:
12    - attack.initial_access
13    - attack.persistence
14    - attack.privilege_escalation
15logsource:
16    category: process_creation
17    product: windows
18detection:
19    selection:
20        ParentImage|endswith: '\keytool.exe'
21        Image|endswith:
22            - '\cmd.exe'
23            - '\sh.exe'
24            - '\bash.exe'
25            - '\powershell.exe'
26            - '\pwsh.exe'
27            - '\schtasks.exe'
28            - '\certutil.exe'
29            - '\whoami.exe'
30            - '\bitsadmin.exe'
31            - '\wscript.exe'
32            - '\cscript.exe'
33            - '\scrcons.exe'
34            - '\regsvr32.exe'
35            - '\hh.exe'
36            - '\wmic.exe'
37            - '\mshta.exe'
38            - '\rundll32.exe'
39            - '\forfiles.exe'
40            - '\scriptrunner.exe'
41            - '\mftrace.exe'
42            - '\AppVLP.exe'
43            - '\systeminfo.exe'
44            - '\reg.exe'
45            - '\query.exe'
46    condition: selection
47falsepositives:
48    - Unknown
49level: high

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