Win32/Chir
Windows Defender detects and removes this threat.
Win32/Chir is a family of malware. It has both worm and virus components. The worm component spreads via email and spreads by exploiting the vulnerability resolved with the release of Microsoft Security Bulletin MS01-020. The virus component infects .EXE and .SCR files in local and remote drives. It's also been known to edit .HTM and .HTML files stored in your PC so that if these files are opened, the virus is run.
Worm:Win32/Chir.D@mm
Windows Defender detects and removes this threat.
This email worm spreads as an attachment to an email. It can also spread via an infected network or removable drive, such as a USB flash drive. When you open the attachment or file, the worm will run.
The worm can also exploit a vulnerability discussed in Microsoft Security Bulletin MS01-020. This can allow the attachment to automatically open when the email is read or previewed on a vulnerable PC. You should download and use the latest version of Internet Explorer to avoid this vulnerability.