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Microsoft Security Intelligence
Published Jan 12, 2005 | Updated Sep 15, 2017


Detected by Microsoft Defender Antivirus

Aliases: W32.Randex (Symantec) W32/Sdbot.worm (McAfee) WORM_RANDEX (Trend Micro) W32/Randex (Sophos)


Windows Defender Antivirus detects and removes this threat.
Win32/Randex is a family of worms that targets PCs running Microsoft Windows 9x, Windows NT 4.0, Windows 2000, Windows Server 2003, and Windows XP. T
he worm scans randomly-generated IP addresses to attempt to spread to network shares with weak passwords. After the worm infects a PC, it connects to an IRC server to receive commands from the attacker. If your PC is infected by this worm, you might notice crashes or slowdowns during normal operation.

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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