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alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE TROJAN Matcash or related downloader User-Agent Detected"; flow:established,to_server; content:"User-Agent\: x"; pcre:"/x\w\wx\w\w\!x\w\wx\w\wx\w\w/"; classtype:trojan-activity; reference:url,doc.bleedingthreats.net/2006382; sid:2006382; rev:1;)

Added 2007-07-09 02:59:49 UTC

Seeing hits like so:

GET http://dl.mcboo.com/z/a8f5a020e4b833865a1034489887c8b9.zip User-Agent: xefx16!xd0xf2x91xedx11G

This ought to catch it

-- MattJonkman - 09 Jul 2007

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Topic revision: r2 - 2007-07-09 - MattJonkman
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