Published Mar 29, 2015 | Updated Sep 15, 2017


Severe |Detected with Windows Defender Antivirus

Aliases: Trojan/Win32.Infostealer (AhnLab) W32/Trojan.ATSR-8193 (Command) winpe/BitterBug.A (Norman) TR/Dldr.Feamko.A (Avira) W32/Backdr.JB!tr (Fortinet) Downloader-FNF!03F528E752DE (McAfee) BKDR_AGENT.SS (Trend Micro) Troj/Backdr-JB (Sophos)


Microsoft security software detects and removes this family of threats.

This malware family can send information about your PC to a malicious hacker. They can also download updates and other files.

Find out ways that malware can get on your PC.


Use the following free Microsoft software to detect and remove this threat:

You should also run a full scan. A full scan might find hidden malware.

Get more help

You can also visit our advanced troubleshooting page or search the Microsoft virus and malware community for more help.

If you’re using Windows XP, see our Windows XP end of support page.

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