alert udp $HOME_NET 1024:65535 -> $EXTERNAL_NET 1024:65535 (msg:"ET TROJAN Storm Worm Encrypted Variant 1 Traffic (1)"; dsize:25; content:"|10 a6|"; depth:2; threshold: type both, count 2, seconds 60, track by_src; classtype:trojan-activity; sid:2007701; rev:3;)

Added 2008-03-05 10:44:22 UTC

Dropped the check for bytes 3 and 4. This will hit on all storms of this key. See http://www.emergingthreats.net/content/view/43/1/

Matt

-- MattJonkman - 05 Mar 2008

alert udp $HOME_NET 1024:65535 -> $EXTERNAL_NET 1024:65535 (msg:"ET TROJAN Storm Worm Encrypted Variant 1 Traffic (1)"; dsize:25; content:"|10 a6|"; depth:2; threshold: type both, count 2, seconds 60, track by_src; classtype:trojan-activity; sid:2007701; rev:3;)

Added 2008-03-05 10:44:22 UTC

alert udp $HOME_NET 1024:65535 -> $EXTERNAL_NET 1024:65535 (msg:"ET TROJAN Storm Worm Encrypted Variant 1 Traffic (1)"; dsize:25; content:"|10 a6 d4 c3|"; depth:4; threshold: type both, count 1, seconds 60, track by_src; classtype:trojan-activity; sid:2007701; rev:2;)

Added 2008-01-31 10:12:24 UTC

alert udp $HOME_NET 1024:65535 -> $EXTERNAL_NET 1024:65535 (msg:"ET TROJAN Storm Worm Encrypted Variant 1 Traffic (1)"; dsize:25; content:"|10 a6 d4 c3|"; depth:4; threshold: type both, count 1, seconds 60, track by_src; classtype:trojan-activity; sid:2007701; rev:2;)

Added 2008-01-31 10:12:24 UTC

alert udp $HOME_NET 1024:65535 -> $EXTERNAL_NET 1024:65535 (msg:"BLEEDING-EDGE TROJAN Storm Worm Encrypted Variant 1 Traffic (1)"; dsize:25; content:"|10 a6 d4 c3|"; depth:4; threshold: type both, count 1, seconds 60, track by_src; classtype:trojan-activity; sid:2007701; rev:1;)

Added 2007-11-14 04:16:02 UTC