alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET POLICY Maxthon Browser Background Agent UA (MxAgent?)"; flow:to_server,established; content:"User-Agent|3a| MxAgent?"; nocase; http_header; reference:url,doc.emergingthreats.net/2011125; classtype:not-suspicious; sid:2011125; rev:8;)

Added 2011-10-12 19:31:22 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET POLICY Maxthon Browser Background Agent UA (MxAgent?)"; flow:to_server,established; content:"User-Agent|3a| MxAgent?"; nocase; http_header; classtype:not-suspicious; reference:url,doc.emergingthreats.net/2011125; sid:2011125; rev:7;)

Added 2011-09-14 22:44:34 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET POLICY Maxthon Browser Background Agent UA (MxAgent?)"; flow:to_server,established; content:"User-Agent|3a| MxAgent?"; nocase; http_header; classtype:not-suspicious; reference:url,doc.emergingthreats.net/2011125; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_MXAgent; sid:2011125; rev:7;)

Added 2011-05-02 14:42:51 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET POLICY Maxthon Browser Background Agent UA (MxAgent?)"; flow:to_server,established; content:"User-Agent|3a| MxAgent?"; nocase; http_header; classtype:not-suspicious; reference:url,doc.emergingthreats.net/2011125; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_MXAgent; sid:2011125; rev:7;)

Added 2011-05-02 14:23:36 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET POLICY Maxthon Browser Background Agent UA (MxAgent?)"; flow:to_server,established; content:"User-Agent|3a| MxAgent?"; nocase; http_header; classtype:not-suspicious; reference:url,doc.emergingthreats.net/2011125; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_MXAgent; sid:2011125; rev:7;)

Added 2011-05-02 14:04:14 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET POLICY Maxthon Browser Background Agent UA (MxAgent?)"; flow:to_server,established; content:"User-Agent|3a| MxAgent?"; nocase; http_header; classtype:not-suspicious; reference:url,doc.emergingthreats.net/2011125; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_MXAgent; sid:2011125; rev:7;)

Added 2011-05-01 20:54:00 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET POLICY Maxthon Browser Background Agent UA (MxAgent?)"; flow:to_server,established; content:"User-Agent|3a| MxAgent?"; nocase; http_header; classtype:not-suspicious; reference:url,doc.emergingthreats.net/2011125; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_MXAgent; sid:2011125; rev:7;)

Added 2011-04-29 17:39:43 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET POLICY Maxthon Browser Background Agent UA (MxAgent?)"; flow:to_server,established; content:"User-Agent|3a| MxAgent?"; nocase; http_header; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2011125; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_MXAgent; sid:2011125; rev:6;)

Added 2011-04-28 19:56:36 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User-Agent (MxAgent?)"; flow:to_server,established; content:"User-Agent|3a| MxAgent?"; nocase; http_header; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2011125; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_MXAgent; sid:2011125; rev:4;)

Added 2011-02-04 17:30:52 UTC

For the sake of documenting common validation cases; we see frequent chatter from the Maxthon browser to sites in maxthon.cn that appear legitimate using this UAS.

GET /data/config.dat HTTP/1.1
Accept: */*
User-Agent: MxAgent
Host: safeurl.maxthon.cn
Connection: Keep-Alive
Cache-Control: no-cache

-- DarrenSpruell - 14 Apr 2011

Validation of numerous hits for this rule broken down by frequency of destination (Host header):

    256 Host: safeurl.maxthon.cn
     13 Host: datacom-dl.maxthon.com
      9 Host: passport-api.maxthon.cn
      5 Host: svrinfo.maxthon.com
      5 Host: kernel-c.maxthon.com
      5 Host: favhttpagent.maxthon.com
      1 Host: msg.maxthon.cn
      1 Host: go.maxthon.cn

-- DarrenSpruell - 14 Apr 2011


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User-Agent (MxAgent?)"; flow:to_server,established; content:"|0d 0a|User-Agent|3a| MxAgent?"; nocase; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2011125; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_MXAgent; sid:2011125; rev:3;)

Added 2010-07-29 22:05:01 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User-Agent (MxAgent?)"; flow:to_server,established; content:"|0d 0a|User-Agent|3a| MxAgent?"; nocase; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2011125; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_MXAgent; sid:2011125; rev:3;)

Added 2010-07-29 22:05:01 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User-Agent (MxAgent?)"; flow:to_server,established; content:"|0d 0a|User-Agent\: MxAgent?"; nocase; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2011125; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_MXAgent; sid:2011125; rev:2;)

Added 2010-05-23 22:46:03 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User-Agent (MxAgent?)"; flow:to_server,established; content:"|0d 0a|User-Agent\: MxAgent?"; nocase; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2011125; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_MXAgent; sid:2011125; rev:2;)

Added 2010-05-23 22:46:03 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User-Agent (MxAgent?)"; flow:to_server,established; content:"|0d 0a|User-Agent\: MxAgent?"; nocase; classtype:trojan-activity; sid:2011125; rev:1;)

Added 2010-05-20 10:46:05 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User-Agent (MxAgent?)"; flow:to_server,established; content:"|0d 0a|User-Agent\: MxAgent?"; nocase; classtype:trojan-activity; sid:2011125; rev:1;)

Added 2010-05-20 10:43:59 UTC


Topic revision: r2 - 2011-04-14 - DarrenSpruell
 
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