WinShell.50, a variant of WinShell, is a Trojan. WinShell.50 allows an attacker to get full control over the infected system and starts to listen to random port. WinShell.50 listens to remote commands and can be used to get access to an infected system and creates Registry keys to start the file automatically.
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
WinShell.50 creates the following autostart registry entry to enable its automatic execution upon start:
Aside from the above-mentioned registry entry, it also registers itself as a service that automatically starts upon boot:
WinShell.50 opens a random port and waits for the attacker to connect to it. The correct password is required in order for the hacker to have access to the backdoor.
The password is: !QAZ1qaz@
These are the actions that can be remotely executed by the hacker:
The malware executes remote commands by using the following programs: