Detecting Trickbot attacks
Trickbot is a Trojan that was initially used to steal banking credentials. Now this malware is known in Microsoft Windows operating systems where it targets Microsoft Defender to prevent its detection and removal, then steals credentials using multi-component modules that collect and exfiltrate data.
These searches detect and investigate unusual activities that might relate to Trickbot, including looking for file writes associated with its payload, process injection, shellcode execution, and data collection.
Data required
How to use Splunk software for this use case
- Executable file written in administrative SMB share
- Executables or script creation in suspicious path
- Executables or script creation in temp path
- Mshta spawning Rundll32 or Regsvr32 process
- [1]Powershell remote thread to known Windows process
- Schedule task with Rundll32 command trigger
- Scheduled task deleted or created via CMD
- Suspicious Rundll32 StartW[2][3]
- Trickbot named pipe
- Wermgr process create executable file
- Wermgr process spawned CMD or Powershell process
- Windows attempt to stop security service
- Windows Office product loading VBE7 DLL
- Windows Office product spawned uncommon process
- Windows process execution in temp dir
- Windows suspicious C2 named pipe
- Windows suspicious named pipe
- Windows suspicious process file path
Next steps
These resources might help you understand and implement this guidance:
- Splunk Blog: Threat Hunting with Splunk: Hands-on Tutorials for the Active Hunter
- If you are a Splunk Enterprise Security customer, you can also get help from the Security Research team's support options on GitHub.