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Description

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

ATT&CK

ID Technique Tactic
T1204 User Execution Execution
T1204.002 Malicious File Execution
`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`

Associated Analytic Story

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.

Required field

  • _time

Kill Chain Phase

  • Exploitation

Known False Positives

unknown

RBA

Risk Score Impact Confidence Message
63.0 70 90 process $SourceImage$ create a file $TargetImage$ in host $Computer$

Reference

Test Dataset

Replay any dataset to Splunk Enterprise by using our replay.py tool or the UI. Alternatively you can replay a dataset into a Splunk Attack Range

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