2006435 < Main < EmergingThreats

Main Web>2006435 (2007-07-31, MattJonkman) (raw view)
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#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;)

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Added 2020-08-20 17:55:21 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" }%
 
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#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;)

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Added 2020-08-19 18:14:16 UTC


 
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#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;)

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Added 2018-09-13 19:39:14 UTC


 
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Added 2018-09-13 17:53:30 UTC


 
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#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;)

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Added 2017-08-07 20:59:38 UTC


 
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#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;)

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Added 2014-09-23 17:58:31 UTC


 
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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;)

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Added 2011-10-12 19:20:43 UTC


 
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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;)

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Added 2011-09-14 22:34:16 UTC


 
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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;)

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Added 2011-02-04 17:25:22 UTC


 
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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;)

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Added 2009-02-12 18:21:19 UTC


 
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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;)

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Added 2009-02-12 18:21:19 UTC


 
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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;)

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Added 2008-03-26 19:08:25 UTC


 
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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;)

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Added 2008-03-26 19:08:25 UTC


 
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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;)

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Added 2008-01-29 10:56:40 UTC


 
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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;)

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Added 2008-01-29 10:56:40 UTC


 
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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;)

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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
 
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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;)

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Added 2007-07-27 12:46:42 UTC


 
 
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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;)

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Added 2007-07-27 03:46:09 UTC


 
 
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Topic revision: r2 - 2007-07-31 - MattJonkman
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