GEN:SID | 1:240 |
Message | DDOS shaft agent to handler |
Summary | This event is generated when a DDoS Shaft agent communicates with a Shaft handler. It is also possible that this event may be generated when any host attempts to discover a Shaft handler.
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Impact | Attempted DDoS. If the listed source IP is in your network, it may be a Shaft agent or a host attempting to discover Shaft handlers. If the listed destination IP is in your network, it may be a Shaft handler.
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Detailed Information | The Shaft DDoS uses a tiered structure of compromised hosts to coordinate and participate in a distributed denial of service attack. Handlers communicate with agents to direct them to launch attacks. An agent may communicate with a handler using a UDP packet to destination port 20433 with a content of "alive".
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Affected Systems | Any Shaft compromised host.
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Attack Scenarios | A Shaft agent needs to communicate with a handler before it is given directions to launch an attack.
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Ease of Attack | Simple. Shaft 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 | Arachnids: http://www.whitehats.com/info/IDS256
Miscellaneous: http://biocserver.cwru.edu/~jose/shaft_analysis/
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Rule References | arachnids: 256
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