W32/Rbot-AU is a worm which attempts to spread to remote network shares. It
also contains backdoor Trojan functionality, allowing unauthorised remote access
to the infected computer via IRC channels while running in the background as a
service process.
W32/Rbot-AU spreads to network shares with weak passwords as a result of the
backdoor Trojan element receiving the appropriate command from a remote user.
W32/Rbot-AU copies itself to the Windows system folder as ISAC.EXE and
creates registry entries called MICROSOFT UPDATE under the following
keys so as to run itself on system startup:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run
HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
W32/Rbot-AU may try to delete network shares on the host computer.