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Backdoor:Win32/IRCFlood
Detected by Microsoft Defender Antivirus
Aliases: Backdoor.Zapchast.PF (BitDefender) not-a-virus:Client-IRC.Win32.mIRC.603 (Kaspersky) potentially unwanted program IRC/Client (McAfee) Mal/Zapchas-C (Sophos) Backdoor.IRC.Flood (Symantec)
Summary
Backdoor:Win32/IRCFlood is an IRC-controlled backdoor trojan that allows an attacker unauthorized access and control of an affected machine. In the wild, this trojan has been distributed via spammed email disguised as a greeting card. The email contains a link to the trojan, which may be downloaded with the file name 'postcard.exe'.
Manual removal is not recommended for this threat. To detect and remove this threat and other malicious software that may have been installed, run a full-system scan with an up-to-date antivirus product such as the Microsoft Safety Scanner (http://go.microsoft.com/fwlink/?LinkId=212742). For more information, see http://www.microsoft.com/protect/computer/viruses/vista.mspx.