ET HUNTING Likely Hex Encoded Executable as String - Dash Separated

alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET HUNTING Likely Hex Encoded Executable as String - Dash Separated";
    flow:established,to_client;
    file.data;
    content:"4D|2d|5A|2d|"; nocase;
    content:"|2d|50|2d|45|2d|00|2d|00|2d|"; distance:0;
    content:"|2d|21|2d|54|2d|68|2d|69|2d|73|2d|20|2d|70|2d|72|2d|6f|2d|67|2d|72|2d|61|2d|6d|2d|"; distance:0; nocase; fast_pattern;
    reference:url,threatmon.io/apt-sidecopy-targeting-indian-government-entities/;
    classtype:bad-unknown;
    sid:2044371; 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;
)