Techniques
Sample rules
Suspicious IcedID Rundll32 Cmdline
- source: splunk
- technicques:
- T1218
- T1218.011
Description
The following analytic detects a suspicious rundll32.exe command line used to execute a DLL file, a technique associated with IcedID malware. It leverages data from Endpoint Detection and Response (EDR) agents, focusing on command-line executions containing the pattern */i:*. This activity is significant as it indicates potential malware attempting to load an encrypted DLL payload, often named license.dat. If confirmed malicious, this could allow attackers to execute arbitrary code, leading to further system compromise and potential data exfiltration.
Detection logic
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where `process_rundll32` Processes.process=*/i:* by Processes.process_name Processes.process Processes.parent_process_name Processes.parent_process Processes.process_id Processes.parent_process_id Processes.dest Processes.user
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `suspicious_icedid_rundll32_cmdline_filter`