1type: trigger
2name: sigmahq/proc_creation_win_cmd_net_use_and_exec_combo
3description: |
4  Detects the execution of the "net use" command to mount a WebDAV server and then immediately execute some content in it. As seen being used in malicious LNK files
5filter: |
6  (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && ((evt.Parsed.Image contains '\\cmd.exe' || evt.Parsed.OriginalFileName == 'Cmd.EXE') && evt.Parsed.CommandLine contains ' net use http' && evt.Parsed.CommandLine contains '& start /b ' && evt.Parsed.CommandLine contains '\\DavWWWRoot\\' && (evt.Parsed.CommandLine contains '.exe ' || evt.Parsed.CommandLine contains '.dll ' || evt.Parsed.CommandLine contains '.bat ' || evt.Parsed.CommandLine contains '.vbs ' || evt.Parsed.CommandLine contains '.ps1 '))
7blackhole: 2m
8#status: test
9labels:
10  service: windows
11  confidence: 1
12  spoofable: 0
13  classification:
14   - attack.t1059.001
15
16  label: "Suspicious File Execution From Internet Hosted WebDav Share"
17  behavior : "windows:audit"
18  remediation: false
19
20scope:
21  type: ParentProcessId
22  expression: evt.Parsed.ParentProcessId
23
24