IRCbot.KC Remover refers to a specialized malware clean-up utility released in August 2005 by security firm Panda Software (now Panda Security). It was designed specifically to target, neutralize, and clean the W32/IRCbot.KC worm and related variations (such as the infamous Zotob worms) from affected Windows computers. What is IRCbot.KC?
The core malware, W32/IRCbot.KC, is an old but historic Windows-based computer worm and backdoor Trojan that caused widespread disruption in the summer of 2005.
The Attack Mechanism: It actively scanned the internet to exploit a critical remote buffer overflow vulnerability in the Windows Plug and Play (PnP) service (identified as Microsoft Security Bulletin MS05-039).
The Payload: Once a computer was successfully infected, the worm opened a backdoor by connecting to a pre-configured Internet Relay Chat (IRC) server channel.
The Risk: This backdoor allowed remote hackers to completely hijack the computer. They used it to steal data, log keystrokes, and assemble “botnets” to launch large-scale Distributed Denial of Service (DDoS) attacks. What Did the Remover Do?
During the height of the 2005 outbreak, standard antivirus engines struggled to clean active, memory-resident infections. Panda Software released a dedicated command-line utility called PQREMOVE (often labeled specifically as the IRCbot.KC Remover). The utility performed several automated tasks: IRC Bot Malware: Analysis, Detection, Removal – Huntress
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