GEN:SID | 1:238 |
Message | DDOS TFN server response |
Summary | This event is generated when a Tribe Flood Network (TFN) Distributed Denial of Service (DDoS) daemon responds to a client request to spawn a shell.
|
Impact | Attempted DDoS. If the listed source IP is in your network, it may be a TFN daemon. If the listed destination IP is in your network, it may be a TFN client.
|
Detailed Information | The TFN DDoS uses a tiered structure of compromised hosts to coordinate and participate in a distributed denial of service attack. Clients communicate with daemons to inform them to launch attacks. A daemon will respond with a client request to spawn a shell with an ICMP echo reply with an ICMP identification number of 123, an ICMP sequence number of 0 and a string of "shell bound to port" in the payload.
|
Affected Systems | Any TFN compromised host.
|
Attack Scenarios | After a host becomes a TFN daemon, it will respond to client requests.
|
Ease of Attack | Simple. TFN code is freely available.
|
Corrective Action | Perform proper forensic analysis on the suspected compromised host to discover the means of compromise.
Rebuild a confirmed compromised host.
Use a packet-filtering firewall to block inappropriate traffic to the network to prevent hosts from being compromised.
|
Additional References | CVE: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2000-0138
Arachnids: http://www.whitehats.com/info/IDS182
|
Rule References | arachnids: 182
|