alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET HUNTING Likely Hex Encoded Executable as String - Tilde Separated"; flow:established,to_client; file.data; content:"4D|7e|5A|7e|"; nocase; content:"|7e|50|7e|45|7e|00|7e|00|7e|"; distance:0; content:"|7e|21|7e|54|7e|68|7e|69|7e|73|7e|20|7e|70|7e|72|7e|6f|7e|67|7e|72|7e|61|7e|6d|7e|"; distance:0; nocase; fast_pattern; reference:url,threatmon.io/apt-sidecopy-targeting-indian-government-entities/; classtype:bad-unknown; sid:2044376; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_02_28, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_28, mitre_tactic_id TA0005, mitre_tactic_name Defense_Evasion, mitre_technique_id T1027, mitre_technique_name Obfuscated_Files_or_Information; target:dest_ip;)