Gaobot.JKO is a worm that connects to several IRC servers in order to receive remote control commands, acting as a backdoor. It can be instructed to log keystrokes, send spam, launch DoS (Denial of Service) attacks, download files, etc.
This worm also ends processes belonging to several security tools, such as antivirus programs and firewalls, among others. This leaves the affected computer vulnerable to the attack of other malware.
Additionally, Gaobot.JKO installs its own FTP (File Transfer Protocol) and TFTP (Trivial File Transfer Protocol) servers on the affected computer in order to spread to other systems.
Gaobot.JKO uses different means to spread:
- It makes copies of itself in the shared network resources it gains access to.
- It exploits the vulnerabilities LSASS, RPC DCOM, Workstation Service, WebDAV, UPnP and SQL Server Web Tasks to spread across the Internet.
It is highly recommendable to download the security patches for the vulnerabilities LSASS, RPC DCOM, Workstation Service, WebDAV, UPnP and SQL Server Web Tasks from the Microsoft website.