Win Susp Computer Name Containing Samtheadmin
Detects suspicious computer name samtheadmin-{1..100}$ generated by hacktool
Sigma rule (View on GitHub)
1title: Win Susp Computer Name Containing Samtheadmin
2id: 39698b3f-da92-4bc6-bfb5-645a98386e45
3status: test
4description: Detects suspicious computer name samtheadmin-{1..100}$ generated by hacktool
5references:
6 - https://twitter.com/malmoeb/status/1511760068743766026
7 - https://github.com/helloexp/0day/blob/614227a7b9beb0e91e7e2c6a5e532e6f7a8e883c/00-CVE_EXP/CVE-2021-42287/sam-the-admin/sam_the_admin.py
8author: elhoim
9date: 2022-09-09
10modified: 2023-01-04
11tags:
12 - attack.initial-access
13 - attack.defense-evasion
14 - cve.2021-42278
15 - cve.2021-42287
16 - attack.persistence
17 - attack.privilege-escalation
18 - attack.t1078
19logsource:
20 service: security
21 product: windows
22detection:
23 # Not adding an EventID on purpose to try to match on any event in security (including use of account), not just 4741 (computer account created)
24 selection1:
25 SamAccountName|startswith: 'SAMTHEADMIN-'
26 SamAccountName|endswith: '$'
27 selection2:
28 TargetUserName|startswith: 'SAMTHEADMIN-'
29 TargetUserName|endswith: '$'
30 condition: 1 of selection*
31fields:
32 - EventID
33 - SamAccountName
34 - SubjectUserName
35 - TargetUserName
36falsepositives:
37 - Unknown
38level: critical
References
Related rules
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