GEN:SID | 1:236 |
Message | DDOS Stacheldraht client check gag |
Summary | This event is generated when a Stacheldraht handler probes for a Stacheldraht agent on the destination host.
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Impact | Severe. This indicates that a Stacheldraht handler may exist on the source host and an agent may exist on the destination host.
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Detailed Information | The Stacheldraht DDoS uses a tiered structure of compromised hosts to coordinate and participate in a distributed denial of service attack.
There are "handler" hosts that are used to coordinate the attacks and "agent" hosts that launch the attack. A handler can discover if a particular host is a Stacheldraht agent by sending it an ICMP echo reply with an ICMP identification number of 668 and a string of "gesundheit!" in the payload.
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Affected Systems | Any Stacheldraht compromised host.
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Attack Scenarios | A handler may attempt to discover if the destination host is a Stacheldraht agent. A script named "gag" can be used to generate this communication for a defender or attacker to discover if a host is a Stacheldraht agent.
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Ease of Attack | Simple. The gag script 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/IDS194
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Rule References | arachnids: 194
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