alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED CVE-2013-1331 Microsoft Office PNG Exploit Specific"; flow:established,to_client; file_data; content:"|89 50 4E 47 0D 0A 1A 0A|"; content:"IHDR"; distance:0; content:"tEXt"; distance:13; content:"db.php?j="; distance:0; content:"msnmusax.ninn"; fast_pattern; classtype:attempted-user; sid:2017008; rev:7; metadata:created_at 2013_06_12, signature_severity Unknown, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_07_01;)