W32/IRCBot-YM is a worm with IRC backdoor functionality for the Windows platform.
W32/IRCBot-YM runs continuously in the background, providing a backdoor server which allows a remote intruder to gain access and control over the computer via IRC channels.
When first run W32/IRCBot-YM copies itself to <System>\f1r5st83.exe.
The following registry entries are created to run f1r5st83.exe on startup:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Systam13
f1r5st83.exe
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Systam13
f1r5st83.exe
The following registry entry is set:
HKCU\Software\Microsoft\OLE
Systam13
f1r5st83.exe