Published Mar 20, 2013|Updated Sep 15, 2017


Severe |Detected with Windows Defender Antivirus

Aliases: W32/Jokra.A (Command) Trojan.Win32.EraseMBR.b (Kaspersky) W32/KillMBR.KR (Norman) TR/KillMBR.Y.2 (Avira) Trojan.KillFiles.10563 (Dr.Web) Win32/KillDisk.NAS trojan (ESET) Trojan.MBR.Killer (Ikarus) KillMBR-FBIA (McAfee) Troj/MBRKill-A (Sophos) Trojan.Jokra (Symantec) TROJ_KILLMBR.DS (Trend Micro)


Trojan:Win32/Dembr.A is a trojan that deletes the Master Boot Record (MBR), rending your computer unusable.

This trojan contains code to ensure that it only runs after 14:00, on March 20, any given year.

Additional remediation steps for Trojan:Win32/Dembr.A

Trojan:Win32/Dembr.A may make lasting changes to your computer that will NOT be restored by detecting and removing this threat. In such cases, you will need to reinstall Windows, and restore your computer from backup.


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