alert tcp $HOME_NET any -> $EXTERNAL_NET 1024: (msg:"ET MALWARE Suspected APT-Q-37 Related Activity (Outbound)"; flow:established,to_server; dsize:<100; content:"|2a 00|"; depth:12; content:"|2a 00 57 00 69 00 6e 00 64 00 6f 00 77 00 73 00|"; distance:20; within:30; fast_pattern; content:!"User-Agent"; content:!"Referer"; content:!"Host"; reference:url,mp.weixin.qq.com/s/8j_rHA7gdMxY1_X8alj8Zg; reference:md5,71e1cfb5e5a515cea2c3537b78325abf; classtype:trojan-activity; sid:2036945; rev:1; metadata:created_at 2022_06_09, malware_family APT_Q_37, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_09;)