alert http any any -> any any (msg:"LOADER [PTsecurity] SteganoAmor Operation"; flow:established, to_server; http.uri; urilen:>100; content:".doc"; nocase; offset:32; content:"_"; content:"/"; pcre:"/^[@a-z]{30,}[_]{2,}[@a-z]{10,}([_]{2,}[@a-z]{10,})?\.[dD][oO][cC](\?|$)/RU"; http.method; content:"HEAD"; http.header; content:"Connection: Keep-Alive"; content:"User-Agent: Microsoft Office"; reference:url, tria.ge/240517-b29pwsbd2w/behavioral1; reference:url, rules.ptsecurity.com; classtype:trojan-activity; sid:10011372; rev:5;)