IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
PowerShell Suspicious Discovery Related Windows API Functions
edit
IMPORTANT: This documentation is no longer updated. Refer to Elastic's version policy and the latest documentation.
PowerShell Suspicious Discovery Related Windows API Functions
editThis rule detects the use of discovery-related Windows API Functions in Powershell Scripts. Attackers can use these functions to perform various situational awareness related activities, like enumerating users, shares, sessions, domain trusts, groups, etc.,
Rule type: query
Rule indices:
- winlogbeat-*
- logs-windows.*
Severity: medium
Risk score: 47
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Discovery
Version: 1
Added (Elastic Stack release): 7.16.0
Rule authors: Elastic
Rule license: Elastic License v2
Potential false positives
editLegitimate Powershell Scripts that make use of these Functions
Rule query
editevent.code:"4104" and powershell.file.script_block_text : ( NetShareEnum or NetWkstaUserEnum or NetSessionEnum or NetLocalGroupEnum or NetLocalGroupGetMembers or DsGetSiteName or DsEnumerateDomainTrusts or WTSEnumerateSessionsEx or WTSQuerySessionInformation or LsaGetLogonSessionData or QueryServiceObjectSecurity )
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Discovery
- ID: TA0007
- Reference URL: https://attack.mitre.org/tactics/TA0007/
-
Technique:
- Name: Network Share Discovery
- ID: T1135
- Reference URL: https://attack.mitre.org/techniques/T1135/
-
Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
-
Technique:
- Name: Command and Scripting Interpreter
- ID: T1059
- Reference URL: https://attack.mitre.org/techniques/T1059/