W32/Rbot-GNA is a worm with IRC backdoor functionality for the Windows platform.
W32/Rbot-GNA 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.
W32/Rbot-GNA spreads to other network computers:
- by exploiting common buffer overflow vulnerabilities, including: LSASS (MS04-011), RPC-DCOM (MS04-012), WKS (MS03-049) (CAN-2003-0812) and ASN.1 (MS04-007)
- networks protected by weak passwords
When run W32/Rbot-GNA copies itself to <System>\netlprto.exe.
The following registry entries are created to run netlprto.exe on startup:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
vtmesys
netlprto.exe
W32/Rbot-GNA includes functionality to:
- download code from the internet
- perform port scanning
- perform DDoS attacks