1type: trigger
2name: sigmahq/proc_creation_win_hktl_cobaltstrike_load_by_rundll32
3description: |
4  Rundll32 can be use by Cobalt Strike with StartW function to load DLLs from the command line.
5filter: |
6  (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && ((evt.Parsed.Image endsWith '\\rundll32.exe' || evt.Parsed.OriginalFileName == 'RUNDLL32.EXE' || evt.Parsed.CommandLine contains 'rundll32.exe' || evt.Parsed.CommandLine contains 'rundll32 ') && evt.Parsed.CommandLine contains '.dll' && (evt.Parsed.CommandLine endsWith ' StartW' || evt.Parsed.CommandLine endsWith ',StartW'))
7blackhole: 2m
8#status: test
9labels:
10  service: windows
11  confidence: 1
12  spoofable: 0
13  classification:
14   - attack.t1218.011
15
16  label: "CobaltStrike Load by Rundll32"
17  behavior : "windows:audit"
18  remediation: false
19
20scope:
21  type: ParentProcessId
22  expression: evt.Parsed.ParentProcessId
23
24