Techniques
Sample rules
Windows WMI Impersonate Token
- source: splunk
- technicques:
- T1047
Description
The following analytic detects potential WMI token impersonation activities in a process or command. It leverages Sysmon EventCode 10 to identify instances where wmiprvse.exe has a duplicate handle or full granted access in a target process. This behavior is significant as it is commonly used by malware like Qakbot for privilege escalation or defense evasion. If confirmed malicious, this activity could allow an attacker to gain elevated privileges, evade defenses, and maintain persistence within the environment.
Detection logic
`sysmon` EventCode=10 SourceImage = "*\\wmiprvse.exe" GrantedAccess IN ("0x1478", "0x1fffff")
| stats count min(_time) as firstTime max(_time) as lastTime by CallTrace EventID GrantedAccess Guid Opcode ProcessID SecurityID SourceImage SourceProcessGUID SourceProcessId TargetImage TargetProcessGUID TargetProcessId UserID dest granted_access parent_process_exec parent_process_guid parent_process_id parent_process_name parent_process_path process_exec process_guid process_id process_name process_path signature signature_id user_id vendor_product
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `windows_wmi_impersonate_token_filter`