Aliases: TA08-297A (other) CVE-2008-4250 (other) VU827267 (other) Win32/Conficker.A (CA) Mal/Conficker-A (Sophos) Trojan.Win32.Agent.bccs (Kaspersky) W32.Downadup.B (Symantec) Trojan-Downloader.Win32.Agent.aqfw (Kaspersky) W32/Conficker.worm (McAfee) Trojan:Win32/Conficker!corrupt (Microsoft) W32.Downadup (Symantec) WORM_DOWNAD (Trend Micro) Confickr (other)
This family of worms can disable several important Windows services and security products. They can also download files and run malicious code on your PC if you have file sharing enabled.
Some worms can also spread via removable drives and by using common passwords.
Use the following free Microsoft software to detect and remove this threat:
You should also run a full scan. A full scan might find other, hidden malware.
You might not be able to connect to websites related to security applications and services that can help you remove this worm.
Microsoft Help and Support have provided a detailed guide to removing a Conficker infection from an infected PC, either manually or by using the Malicious Software Removal Tool (MSRT).
More information about deploying MSRT in an enterprise environment can be found here:
If you’re using Windows XP, see our Windows XP end of support page.