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2006435
(2007-07-31,
MattJonkman
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<h2> #alert ssh $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED LibSSH Based SSH Connection - Often used as a BruteForce Tool"; flow:established,to_server; ssh.softwareversion:"libssh-"; threshold: type limit, track by_src, count 1, seconds 30; reference:url,doc.emergingthreats.net/2006435; classtype:misc-activity; sid:2006435; rev:10; metadata:created_at 2010_07_30, updated_at 2021_08_27;) </h2> Added 2021-08-27 18:10:46 UTC %COMMENT{type="threadmode" default="Please enter documentation, comments, false positives, or concerns with this signature. Press the Attach button below to add samples or Pcaps." button="Add to Documentation" }% <hr> <h2> #alert ssh $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED LibSSH Based SSH Connection - Often used as a BruteForce Tool"; flow:established,to_server; ssh.softwareversion:"libssh-"; threshold: type limit, track by_src, count 1, seconds 30; reference:url,doc.emergingthreats.net/2006435; classtype:misc-activity; sid:2006435; rev:10; metadata:created_at 2010_07_30, updated_at 2020_08_20;) </h2> Added 2020-08-20 17:55:21 UTC <hr> <h2> #alert ssh $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED LibSSH Based SSH Connection - Often used as a BruteForce Tool"; flow:established,to_server; ssh.softwareversion:"libssh-"; threshold: type limit, track by_src, count 1, seconds 30; reference:url,doc.emergingthreats.net/2006435; classtype:misc-activity; sid:2006435; rev:10; metadata:created_at 2010_07_30, updated_at 2020_08_19;) </h2> Added 2020-08-19 18:14:16 UTC <hr> <h2> #alert ssh $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED LibSSH Based SSH Connection - Often used as a BruteForce Tool"; flow:established,to_server; ssh.softwareversion:"libssh-"; threshold: type limit, track by_src, count 1, seconds 30; reference:url,doc.emergingthreats.net/2006435; classtype:misc-activity; sid:2006435; rev:10; metadata:created_at 2010_07_30, updated_at 2010_07_30;) </h2> Added 2018-09-13 19:39:14 UTC <hr> <h2> </h2> Added 2018-09-13 17:53:30 UTC <hr> <h2> #alert ssh $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED LibSSH Based SSH Connection - Often used as a BruteForce Tool"; flow:established,to_server; ssh.softwareversion:"libssh-"; threshold: type limit, track by_src, count 1, seconds 30; reference:url,doc.emergingthreats.net/2006435; classtype:misc-activity; sid:2006435; rev:10; metadata:created_at 2010_07_30, updated_at 2010_07_30;) </h2> Added 2017-08-07 20:59:38 UTC <hr> <h2> #alert ssh $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED LibSSH Based SSH Connection - Often used as a BruteForce Tool"; flow:established,to_server; ssh.softwareversion:"libssh-"; threshold: type limit, track by_src, count 1, seconds 30; reference:url,doc.emergingthreats.net/2006435; classtype:misc-activity; sid:2006435; rev:10;) </h2> Added 2014-09-23 17:58:31 UTC <hr> <h2> alert tcp $EXTERNAL_NET any -> $HOME_NET 22 (msg:"ET SCAN LibSSH Based SSH Connection - Often used as a BruteForce Tool"; flow:established,to_server; content:"SSH-"; content:"libssh"; within:20; threshold: type limit, track by_src, count 1, seconds 30; reference:url,doc.emergingthreats.net/2006435; classtype:misc-activity; sid:2006435; rev:6;) </h2> Added 2011-10-12 19:20:43 UTC <hr> <h2> alert tcp $EXTERNAL_NET any -> $HOME_NET 22 (msg:"ET SCAN LibSSH Based SSH Connection - Often used as a BruteForce Tool"; flow:established,to_server; content:"SSH-"; content:"libssh"; within:20; classtype:misc-activity; threshold: type limit, track by_src, count 1, seconds 30; reference:url,doc.emergingthreats.net/2006435; sid:2006435; rev:6;) </h2> Added 2011-09-14 22:34:16 UTC <hr> <h2> alert tcp $EXTERNAL_NET any -> $HOME_NET 22 (msg:"ET SCAN LibSSH Based SSH Connection - Often used as a BruteForce Tool"; flow:established,to_server; content:"SSH-"; content:"libssh"; within:20; classtype:misc-activity; threshold: type limit, track by_src, count 1, seconds 30; reference:url,doc.emergingthreats.net/2006435; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/SCAN/SCAN_SSH_Brute_Force; sid:2006435; rev:6;) </h2> Added 2011-02-04 17:25:22 UTC <hr> <h2> alert tcp $EXTERNAL_NET any -> $HOME_NET 22 (msg:"ET SCAN LibSSH Based SSH Connection - Often used as a BruteForce Tool"; flow:established,to_server; content:"SSH-"; content:"libssh"; within:20; classtype:misc-activity; threshold: type limit, track by_src, count 1, seconds 30; reference:url,doc.emergingthreats.net/2006435; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/SCAN/SCAN_SSH_Brute_Force; sid:2006435; rev:6;) </h2> Added 2009-02-12 18:21:19 UTC <hr> <h2> alert tcp $EXTERNAL_NET any -> $HOME_NET 22 (msg:"ET SCAN LibSSH Based SSH Connection - Often used as a BruteForce Tool"; flow:established,to_server; content:"SSH-"; content:"libssh"; within:20; classtype:misc-activity; threshold: type limit, track by_src, count 1, seconds 30; reference:url,doc.emergingthreats.net/2006435; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/SCAN/SCAN_SSH_Brute_Force; sid:2006435; rev:6;) </h2> Added 2009-02-12 18:21:19 UTC <hr> <h2> alert tcp $EXTERNAL_NET any -> $HOME_NET 22 (msg:"ET SCAN LibSSH Based SSH Connection - Often used as a BruteForce Tool"; flow:established,to_server; content:"SSH-"; content:"libssh"; within:20; classtype:misc-activity; threshold: type limit, track by_src, count 1, seconds 30; sid:2006435; rev:5;) </h2> Added 2008-03-26 19:08:25 UTC <hr> <h2> alert tcp $EXTERNAL_NET any -> $HOME_NET 22 (msg:"ET SCAN LibSSH Based SSH Connection - Often used as a BruteForce Tool"; flow:established,to_server; content:"SSH-"; content:"libssh"; within:20; classtype:misc-activity; threshold: type limit, track by_src, count 1, seconds 30; sid:2006435; rev:5;) </h2> Added 2008-03-26 19:08:25 UTC <hr> <h2> alert tcp $EXTERNAL_NET any -> $HOME_NET 22 (msg:"ET SCAN LibSSH Based SSH Connection - Often used as a BruteForce Tool"; flow:established,to_server; content:"SSH-"; content:"libssh"; within:20; classtype:misc-activity; sid:2006435; rev:4;) </h2> Added 2008-01-29 10:56:40 UTC <hr> <h2> alert tcp $EXTERNAL_NET any -> $HOME_NET 22 (msg:"ET SCAN LibSSH Based SSH Connection - Often used as a BruteForce Tool"; flow:established,to_server; content:"SSH-"; content:"libssh"; within:20; classtype:misc-activity; sid:2006435; rev:4;) </h2> Added 2008-01-29 10:56:40 UTC <hr> <h2> alert tcp $EXTERNAL_NET any -> $HOME_NET 22 (msg:"BLEEDING-EDGE SCAN LibSSH Based SSH Connection - Often used as a BruteForce Tool"; flow:established,to_server; content:"SSH-"; content:"libssh"; within:20; classtype:misc-activity; sid:2006435; rev:3;) </h2> Added 2007-07-31 00:16:11 UTC This is not necessarily a sure sign of a brute force attack. Libssh is a useful and often utilized library. However it is very often used in bruteforce tools. If you see frequent hits on this sig in a short period it is likely hostile. -- Main.MattJonkman - 31 Jul 2007 <hr> <h2> alert tcp $EXTERNAL_NET any -> $HOME_NET 22 (msg:"BLEEDING-EDGE SCAN LibSSH Based SSH Bruteforce Attempt"; flow:established,to_server; content:"SSH-"; content:"libssh"; within:20; classtype:misc-activity; sid:2006435; rev:2;) </h2> Added 2007-07-27 12:46:42 UTC <hr> <h2> alert tcp $EXTERNAL_NET any -> $HOME_NET 22 (msg:"BLEEDING-EDGE SCAN LibSSH Based SSH Bruteforce Attempt"; flags:PA; flow:established; pcre:"/SSH-(1|2)\.0-\.*libssh\.*/"; classtype:misc-activity; sid:2006435; rev:1;) </h2> Added 2007-07-27 03:46:09 UTC <hr>
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Topic revision: r2 - 2007-07-31
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