Rule: -- Sid: 3011 -- Summary: This event is generated when an attempt is made to find the System directory on a target host with the RUX the Tick Trojan. -- Impact: If successful, the attacker would gain unauthorized access to the system, to upload and execute file on the target system. The attacker can use this function to upload additional backdoors to the victim's system and execute them. -- Detailed Information: When executed, RUX the Tick opens up its assigned port (default is 22222) for communication with the attacker. RUX the Tick has three functions: Get Windows Directory, Get System Directory, and Upload And Execute File. Get Windows Directory and Get System Directory are used for reconnaissance. Upload And Execute File is mainly used to upload and run other backdoors onto the victim's computer. -- Affected Systems: Windows 95/98/ME/NT/2000 -- Attack Scenarios: The victim must first install the server. Be wary of suspicious files because they often can be backdoors in disguise. Once the victim mistakenly installs the server program, the attacker usually will employ an IP scanner program to find the IP addresses of victims that have installed the program. Then the attacker enters the IP address, port number (which is assigned to the server program by the attacker: default is 22222), and presses the connect button and he has access to the computer. -- Ease of Attack: Simple. -- False Positives: None known -- False Negatives: None known -- Corrective Action: Using Windows Task Manager, kill these processes: ruxserver.exe and server.exe. Use Windows Explorer to find ruxserver.exe and delete the file. Keep anti-virus programs updated with the latest definitions. -- Contributors: Sourcefire Research Team Ricky Macatee -- Additional References: PestPatrol: http://www.pestpatrol.com/PestInfo/R/RUX.ASP --
