GEN:SID | 1:228 |
Message | DDOS TFN client command BE |
Summary | This event is generated when a Tribe Flood Network (TFN) Distributed Denial of Service (DDoS) client communicates with the TFN handler daemon to spawn a shell.
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Impact | Attempted DDoS. If the listed source IP is in your network, it may be a TFN client. If the listed destination IP is in your network, it may be a TFN handler daemon.
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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 direct them to launch attacks. A client will communicate with a daemon to spawn a shell via an ICMP echo reply with an ICMP identification number of 456 and an ICMP sequence number of 0.
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Affected Systems | Any TFN compromised host.
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Attack Scenarios | After a host becomes a TFN client, it will attempt to communicate with other TFN handler daemons.
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Ease of Attack | Simple. TFN code is freely available.
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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.
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Additional References | CVE: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2000-0138
Arachnids: http://www.whitehats.com/info/IDS184
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Rule References | arachnids: 184
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