We're gradually updating threat actor names in our reports to align with the new weather-themed taxonomy. Learn about Microsoft threat actor names
Backdoor:MSIL/Sorcas.A
Aliases: No associated aliases
Summary
Microsoft Defender Antivirus detects and removes this threat.
This backdoor connects to a remote server to retrieve and execute commands.
We have observed this backdoor being downloaded from hxxp://iqhost[.]us:99/a[.]zip.
When run, it connects to the server hxxps://iqhost[.]us:3389/. It then waits for and executes commands, including but not limited to:
- Download and run files
- Run cmd.exe to execute shell commands
- Stop process
Scanning with Microsoft Defender Antivirus or other Microsoft antimalware automatically removes threats as they are detected. However, many infections can leave remnant files and system changes. Updating your antimalware definitions and running a full scan might help address these remnant artifacts.
You can also visit our advanced troubleshooting page or search the Microsoft virus and malware community for more help.
Secure configuration
To get the best and fastest protection from Microsoft Defender Antivirus, ensure it can connect to the cloud protection service.
Use the Windows search box to find and open the Windows Defender Security Center. Navigate to Virus & threat protection settings and enable the following:
- Cloud-delivered protection
- Automatic sample submission
Prevent malware infection
Refer to our guide on how to prevent malware infection.
