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Microsoft Security Intelligence
Published Dec 01, 2010 | Updated Sep 15, 2017

TrojanDropper:Win32/Seftad.A

Detected by Microsoft Defender Antivirus

Aliases: Trojan-Ransom.Win32.Seftad.a (Kaspersky) BOO/Seftad.A (Avira) Trojan.MBRlock.1 (Dr.Web) Trojan-Ransom.Win32.Seftad (Ikarus)

Summary

TrojanDropper:Win32/Seftad.A is a trojan that modifies the Master Boot Record (MBR) to lock the system. The trojan attempts to force the user to visit a certain website to acquire an unblocking password for a fee.
To detect and remove this threat and other malicious software that may be installed in your computer, run a full-system scan with an up-to-date antivirus product such as the following:
 
For more information on antivirus software, see http://www.microsoft.com/windows/antivirus-partners/.
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