Detection rules › Sigma
Uncommon Connection to Active Directory Web Services
Detects uncommon network connections to the Active Directory Web Services (ADWS) from processes not typically associated with ADWS management.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Discovery | T1087 Account Discovery |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Sysmon | 3 | Network connection |
Stages and Predicates
Stage 1: selection
DestinationPort: 9389
Initiated: true
Stage 2: not 1 of filter_main_*
or:
Image: 'C:\Program Files\Microsoft Monitoring Agent\'
Image: 'C:\Windows\system32\dsac.exe'
Image|startswith: 'C:\Program Files\PowerShell\7-preview\pwsh.ex'
Image|startswith: 'C:\Program Files\PowerShell\7\pwsh.exe'
Image|startswith: 'C:\Windows\SysWOW64\WindowsPowerShell\'
Image|startswith: 'C:\Windows\System32\WindowsPowerShell\'
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
DestinationPort | eq |
|
Image | eq |
|
Image | starts_with |
|
Initiated | eq |
|