alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Win32 Agent.ALT C&C Initial Infection Checkin"; flow:established,to_server; dsize:18; content:"|00 02|"; offset:0; depth:5; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/Win32AgentALT; sid:2007588; rev:4;)

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

False positive when utilizing citrixonline.com services.

-- TomBicer - 10 Jun 2008

Can you share a pcap or more detail? Thanks!

-- MattJonkman - 12 Jun 2008

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Win32 Agent.ALT C&C Initial Infection Checkin"; flow:established,to_server; dsize:18; content:"|00 02|"; offset:0; depth:5; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/Win32AgentALT; sid:2007588; rev:4;)

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

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE TROJAN Win32 Agent.ALT C&C Initial Infection Checkin"; flow:established,to_server; dsize:18; content:"|00 02|"; offset:0; depth:5; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/Win32AgentALT; sid:2007588; rev:3;)

Added 2008-01-09 17:42:41 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE TROJAN Win32 Agent.ALT C&C Initial Infection Checkin"; flow:established,to_server; dsize:18; content:"|00 02|"; offset:0; depth:5; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/Win32AgentALT; sid:2007588; rev:3;)

Added 2008-01-09 17:42:41 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE TROJAN Win32 Agent.ALT C&C Initial Infection Checkin"; flow:established,to_server; dsize:18; content:"|00 02|"; offset:0; depth:5; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/Win32AgentALT; sid:2007588; rev:3;)

Added 2008-01-09 15:15:19 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE TROJAN Win32 Agent.ALT C&C Initial Infection Checkin"; flow:established,to_server; dsize:18; content:"|00 02|"; offset:0; depth:5; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/Win32AgentALT; sid:2007588; rev:3;)

Added 2008-01-09 15:15:19 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE TROJAN Win32 Agent.ALT C&C Initial Infection Checkin"; flow:established,to_server; dsize:18; content:"|00 02|"; offset:0; depth:5; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/Win32AgentALT; sid:2007588; rev:3;)

Added 2008-01-08 20:25:20 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE TROJAN Win32 Agent.ALT C&C Initial Infection Checkin"; flow:established,to_server; dsize:18; content:"|00 02|"; offset:0; depth:5; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/Win32AgentALT; sid:2007588; rev:3;)

Added 2008-01-08 20:25:20 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE TROJAN Win32 Agent.ALT C&C Initial Infection Checkin"; flow:established,to_server; dsize:18; content:"|00 02|"; offset:0; depth:5; classtype:trojan-activity; reference:url,doc.bleedingthreats.net/bin/view/Main/Win32AgentALT; sid:2007588; rev:2;)

Added 2007-08-31 14:00:00 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE TROJAN Win32 Agent.ALT C&C Initial Infection Checkin"; flow:established,to_server; dsize:18; content:"|00 02|"; offset:0; depth:5; classtype:trojan-activity; reference:url,doc.bleedingthreats.net/bin/view/Main/Win32AgentALT; sid:2007588; rev:2;)

Added 2007-08-31 14:00:00 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE TROJAN Win32 Agent.ALT C&C Initial Infection Checkin"; flow:established,to_server; dsize:18; content:"|00 02 5e 3b 5a|"; offset:0; depth:5; classtype:trojan-activity; reference:url.doc.bleedingthreats.net/bin/view/Main/Win32AgentALT; sid:2007588; rev:1;)

Added 2007-08-31 05:54:41 UTC

see Win32AgentALT

-- MattJonkman - 31 Aug 2007