Provided by Aanval (Snort & Syslog Intrusion Detection and Correlation Engine) www.aanval.com
--
GEN:SID | 1:246 |
Message | DDOS mstream agent pong to handler |
Summary | This event is generated when an mstream agent responds to an mstream handler's "ping" request. |
Impact | Severe. If the listed source IP is in your network, it may be an mstream agent. If the listed destination IP is in your network, it may be an mstream agent. |
Detailed Information | The mstream 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 probe to see if an agent is active by sending it a UDP packet to destination port 10498 with a string of "ping" in the payload. An active agent will reply with a UDP packet to destination port 6838 with a string of "pong" in payload. |
Affected Systems | Any mstream compromised host. |
Attack Scenarios | A mstream agent may respond with a "pong" to a "ping" request from a handler. |
Ease of Attack | Simple. mstream 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 | NAI: http://vil.nai.com/vil/content/v_98662.htm SecurityFocus: http://www.securityfocus.com/archive/82/58040 CERT: http://www.cert.org/incident_notes/IN-2000-05.html CVE: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2000-0138 |
--
DID:438033
--
http://www.aanval.com/