CobaltStrike Named Pipe

calendar Aug 7, 2023 · attack.defense_evasion attack.privilege_escalation attack.t1055  ·
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Detects the creation of a named pipe as used by CobaltStrike

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 1title: CobaltStrike Named Pipe
 2id: d5601f8c-b26f-4ab0-9035-69e11a8d4ad2
 3related:
 4    - id: 85adeb13-4fc9-4e68-8a4a-c7cb2c336eb7 # Patterns
 5      type: similar
 6    - id: 0e7163d4-9e19-4fa7-9be6-000c61aad77a # Regex
 7      type: similar
 8status: test
 9description: Detects the creation of a named pipe as used by CobaltStrike
10references:
11    - https://twitter.com/d4rksystem/status/1357010969264873472
12    - https://labs.f-secure.com/blog/detecting-cobalt-strike-default-modules-via-named-pipe-analysis/
13    - https://github.com/SigmaHQ/sigma/issues/253
14    - https://blog.cobaltstrike.com/2021/02/09/learn-pipe-fitting-for-all-of-your-offense-projects/
15    - https://redcanary.com/threat-detection-report/threats/cobalt-strike/
16author: Florian Roth (Nextron Systems), Wojciech Lesicki
17date: 2021/05/25
18modified: 2022/10/31
19tags:
20    - attack.defense_evasion
21    - attack.privilege_escalation
22    - attack.t1055
23logsource:
24    product: windows
25    category: pipe_created
26    definition: 'Note that you have to configure logging for Named Pipe Events in Sysmon config (Event ID 17 and Event ID 18). The basic configuration is in popular sysmon configuration (https://github.com/SwiftOnSecurity/sysmon-config), but it is worth verifying. You can also use other repo, e.g. https://github.com/Neo23x0/sysmon-config, https://github.com/olafhartong/sysmon-modular. How to test detection? You can always use Cobalt Strike, but also you can check powershell script from this site https://svch0st.medium.com/guide-to-named-pipes-and-hunting-for-cobalt-strike-pipes-dc46b2c5f575'
27detection:
28    selection_MSSE:
29        PipeName|contains|all:
30            - '\MSSE-'
31            - '-server'
32    selection_postex:
33        PipeName|startswith: '\postex_' # Also include the pipe "\postex_ssh_"
34    selection_status:
35        PipeName|startswith: '\status_'
36    selection_msagent:
37        PipeName|startswith: '\msagent_'
38    selection_mojo:
39        PipeName|startswith: '\mojo_'
40    selection_interprocess:
41        PipeName|startswith: '\interprocess_'
42    selection_samr:
43        PipeName|startswith: '\samr_'
44    selection_netlogon:
45        PipeName|startswith: '\netlogon_'
46    selection_srvsvc:
47        PipeName|startswith: '\srvsvc_'
48    selection_lsarpc:
49        PipeName|startswith: '\lsarpc_'
50    selection_wkssvc:
51        PipeName|startswith: '\wkssvc_'
52    condition: 1 of selection*
53falsepositives:
54    - Unknown
55level: critical

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