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| GEN:SID | 1:160 |
| Message | BACKDOOR NetMetro Incoming Traffic |
| Summary | This event is generated when incoming an data stream associated with the NetMetro Trojan Horse is detected. |
| Impact | Limited control of the target host. |
| Detailed Information | Due to the nature of this Trojan it is unlikely that the attacker's client IP address has been spoofed. The server portion opens TCP port 5031 by default to establish a connection between client and server. This event indicates that a host external to the protected network running a NetMetro Trojan Server is communicating with a host on the protected network that may be controlling the Trojan. |
| Affected Systems | Windows 95 Windows 98 Windows ME Windows NT Windows 2000 |
| Attack Scenarios | This Trojan may be delivered to the target in a number of ways. This event is indicative of an existing infection being activated. Initial compromise can be in the form of a Win32 installation program that may use the extension ".jpg" or ".bmp" when delivered via e-mail for example. |
| Ease of Attack | This is Trojan activity, the target machine may already be compromised. Updated virus definition files are essential in detecting this Trojan. The Trojan server is named NMS.exe. |
| Corrective Action | A reboot of the infected machine is recommended. The Trojan does not start automatically at boot time nor does it change any system registry settings. |
| Additional References | Whitehats arachNIDS http://www.whitehats.com/info/IDS79 Dark-e: http://www.dark-e.com/archive/trojans/NetMetro/index.html |
| Rule References | arachnids: 79 |
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DID:134834
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