This search is to detect dropping a suspicious file named as “license.dat” in %appdata%. This behavior seen in latest IcedID malware that contain the actual core bot that will be injected in other process to do banking stealing.
- Type: Hunting
- Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
- Datamodel: Endpoint
- Last Updated: 2021-07-30
- Author: Teoderick Contreras, Splunk
- ID: b7a045fc-f14a-11eb-8e79-acde48001122
Kill Chain Phase
1 2 3 4 5 `sysmon` EventCode= 11 TargetFilename = "*\\license.dat" AND (TargetFilename="*\\appdata\\*" OR TargetFilename="*\\programdata\\*") |stats count min(_time) as firstTime max(_time) as lastTime by TargetFilename EventCode process_id process_name Computer | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `drop_icedid_license_dat_filter`
The SPL above uses the following Macros:
Note that drop_icedid_license_dat_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.
How To Implement
To successfully implement this search, you need to be ingesting logs with the process name, parent process, and command-line executions from your endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the Sysmon TA.
Known False Positives
Associated Analytic story
|63.0||70||90||process $SourceImage$ create a file $TargetImage$ in host $Computer$|
source | version: 1