alert tcp $HOME_NET any -> $EXTERNAL_NET 6666:7000 (msg:"ET TROJAN IRC Private message on non-standard port"; flow:to_server,established; dsize:<128; content:"PRIVMSG "; depth:8; content:!".twitch.tv"; content:!"twitch.tv|0d 0a|"; reference:url,doc.emergingthreats.net/bin/view/Main/2000347; classtype:trojan-activity; sid:2000347; rev:16;)

Added 2017-06-06 16:48:41 UTC

FP for twitch.tv

Please look at the attached file (PCAP)

-- MaksymParpaley - 2017-07-18


alert tcp $HOME_NET any -> $EXTERNAL_NET 6666:7000 (msg:"ET TROJAN IRC Private message on non-standard port"; flow:to_server,established; dsize:<128; content:"PRIVMSG "; depth:8; content:!".twitch.tv|20|"; content:!"twitch.tv|0d 0a|"; reference:url,doc.emergingthreats.net/bin/view/Main/2000347; classtype:trojan-activity; sid:2000347; rev:15;)

Added 2017-04-19 17:17:06 UTC

Dear ET, FP for twitch.tv detected

1) IP address from PCAP is 54.69.96.243 belongs to twitch.tv 2) What is twitch.tv - ( https://www.twitch.tv/p/about ) and ( https://en.wikipedia.org/wiki/Twitch.tv ) 3) Inside PCAP we see tmi.twitch.tv which is Twitch Message Interface. 4) TWITCH offers web-based chat functionality and IRC interface as well. More information here ( https://dev.twitch.tv/docs/v5/guides/irc/ )) 5) tmi.twitch.tv server for IRC chat. Server operates on next TCP ports (80,443, 6667 standard for IRC)

I added PCAP for you

Please ad negation for !"tmi.twitch.tv" because we are not dealing with Trojan

Thank you!

-- MaksymParpaley - 2017-06-06

I modified content:!".twitch.tv|20|"; to content:!".twitch.tv"; (which is a less strict negation than !"tmi.twitch.tv"), let us know if that doesn't fix this for you!

-- DarienH - 2017-06-06


alert tcp $HOME_NET any -> $EXTERNAL_NET 6666:7000 (msg:"ET TROJAN IRC Private message on non-standard port"; flow:to_server,established; dsize:<128; content:"PRIVMSG "; depth:8; content:!".twitch.tv|20|"; reference:url,doc.emergingthreats.net/bin/view/Main/2000347; classtype:trojan-activity; sid:2000347; rev:14;)

Added 2015-08-10 20:21:43 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET 6666:7000 (msg:"ET TROJAN IRC Private message on non-standard port"; flow:to_server,established; dsize:<128; content:"PRIVMSG "; depth:8; reference:url,doc.emergingthreats.net/bin/view/Main/2000347; classtype:trojan-activity; sid:2000347; rev:13;)

Added 2011-10-21 14:50:55 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET 6661:6668 (msg:"ET ATTACK_RESPONSE IRC - Private message on non-std port"; flow: to_server,established; dsize: <128; content:"PRIVMSG "; nocase; offset: 0; depth: 8; reference:url,doc.emergingthreats.net/bin/view/Main/2000347; classtype:trojan-activity; sid:2000347; rev:9;)

Added 2011-10-12 19:09:34 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET 6661:6668 (msg:"ET ATTACK_RESPONSE IRC - Private message on non-std port"; flow: to_server,established; dsize: <128; content:"PRIVMSG "; nocase; offset: 0; depth: 8; classtype: trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2000347; sid:2000347; rev:9;)

Added 2011-09-15 14:46:06 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET 6661:6668 (msg:"ET ATTACK_RESPONSE IRC - Private message on non-std port"; flow: to_server,established; dsize: <128; content:"PRIVMSG "; nocase; offset: 0; depth: 8; classtype: trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2000347; sid:2000347; rev:9;)

Added 2011-09-14 20:34:24 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET 6661:6668 (msg:"ET ATTACK_RESPONSE IRC - Private message on non-std port"; flow: to_server,established; dsize: <128; content:"PRIVMSG "; nocase; offset: 0; depth: 8; classtype: trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2000347; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/ATTACK_RESPONSE/ATTACK_RESPONSE_Non-Standard_IRC; sid:2000347; rev:9;)

Added 2011-02-04 17:21:13 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET 6661:6668 (msg: "ET ATTACK_RESPONSE IRC - Private message on non-std port"; flow: to_server,established; dsize: <128; content:"PRIVMSG "; nocase; offset: 0; depth: 8; tag: session,300,seconds; classtype: trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2000347; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/ATTACK_RESPONSE/ATTACK_RESPONSE_Non-Standard_IRC; sid:2000347; rev:8;)

Added 2010-06-23 13:46:09 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET 6661:6668 (msg: "ET ATTACK_RESPONSE IRC - Private message on non-std port"; flow: to_server,established; dsize: <128; content:"PRIVMSG "; nocase; offset: 0; depth: 8; tag: session,300,seconds; classtype: trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2000347; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/ATTACK_RESPONSE/ATTACK_RESPONSE_Non-Standard_IRC; sid:2000347; rev:8;)

Added 2010-06-23 13:46:09 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET 6661:6668 (msg: "ET ATTACK_RESPONSE IRC - Private message on non-std port"; flow: to_server,established; dsize: <128; content:"PRIVMSG "; nocase; offset: 0; depth: 8; tag: session,300,seconds; classtype: trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2000347; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/ATTACK_RESPONSE/ATTACK_RESPONSE_Non-Standard_IRC; sid: 2000347; rev:8;)

Added 2010-06-15 13:15:59 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET 6661:6668 (msg: "ET ATTACK_RESPONSE IRC - Private message on non-std port"; flow: to_server,established; dsize: <128; content:"PRIVMSG "; nocase; offset: 0; depth: 8; tag: session,300,seconds; classtype: trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2000347; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/ATTACK_RESPONSE/ATTACK_RESPONSE_Non-Standard_IRC; sid: 2000347; rev:8;)

Added 2010-06-15 13:15:59 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET 6661:6668 (msg: "ET ATTACK RESPONSE IRC - Private message on non-std port"; flow: to_server,established; dsize: <128; content:"PRIVMSG "; nocase; offset: 0; depth: 8; tag: session,300,seconds; classtype: trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2000347; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/ATTACK_RESPONSE/ATTACK_RESPONSE_Non-Standard_IRC; sid: 2000347; rev:7;)

Added 2009-02-06 19:00:55 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET 6661:6668 (msg: "ET ATTACK RESPONSE IRC - Private message on non-std port"; flow: to_server,established; dsize: <128; content:"PRIVMSG "; nocase; offset: 0; depth: 8; tag: session,300,seconds; classtype: trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2000347; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/ATTACK_RESPONSE/ATTACK_RESPONSE_Non-Standard_IRC; sid: 2000347; rev:7;)

Added 2009-02-06 19:00:55 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET 6661:6668 (msg: "ET ATTACK RESPONSE IRC - Private message on non-std port"; flow: to_server,established; dsize: <128; content:"PRIVMSG "; nocase; offset: 0; depth: 8; tag: session,300,seconds; classtype: trojan-activity; sid: 2000347; rev:6;)

Added 2008-01-23 10:46:27 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET 6661:6668 (msg: "ET ATTACK RESPONSE IRC - Private message on non-std port"; flow: to_server,established; dsize: <128; content:"PRIVMSG "; nocase; offset: 0; depth: 8; tag: session,300,seconds; classtype: trojan-activity; sid: 2000347; rev:6;)

Added 2008-01-23 10:46:27 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET 6661:6668 (msg: "BLEEDING-EDGE ATTACK RESPONSE IRC - Private message on non-std port"; flow: to_server,established; dsize: <128; content:"PRIVMSG "; nocase; offset: 0; depth: 8; tag: session,300,seconds; classtype: trojan-activity; sid: 2000347; rev:5; )



Topic attachments
I Attachment Action Size Date Who Comment
PNGpng twitch.png manage 47.1 K 2017-07-18 - 11:37 MaksymParpaley  
Topic revision: r4 - 2017-07-18 - MaksymParpaley
 
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