alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Suspected APT32/Oceanlotus Maldoc CnC"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".png?"; content:"=e010000127"; distance:0; fast_pattern; content:".exe|3b|"; nocase; pcre:"/^[^\r\n]+\.exe(?:\x3b)?$/Ri"; reference:md5,e2511f009b1ef8843e527f765fd875a7; reference:md5,cc2027319a878ee18550e35d9b522706; reference:url,twitter.com/HONKONE_K/status/1290511333343993856; classtype:command-and-control; sid:2030652; rev:2; metadata:attack_target Client_Endpoint, created_at 2020_08_05, deployment Perimeter, deployment SSLDecrypt, malware_family APT32, malware_family OceanLotus, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_12_10;)