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Microsoft Security Intelligence
Published Jan 18, 2007 | Updated Sep 15, 2017

Worm:Win32/Klez.E@mm

Detected by Microsoft Defender Antivirus

Aliases: W32/Klez.E@MM (McAfee) WORM_KLEZ.E (Trend Micro) W32.Klez.E@mm (Symantec)

Summary

Win32/Klez.E@mm is a mass-mailing e-mail worm that also copies itself to local, mapped, and network shares. Win32/Klez.E@mm attempts to terminate processes associated with antivirus and security software. When sending copies of itself via e-mail, the worm may also attach randomly selected legitimate files found on the system. This could result in compromise of confidential or sensitive data.
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