ET HUNTING Likely Hex Encoded Executable as String - Percent Separated

Query · suricata

flow:established,to_client;
file.data;
content:"4D|25|5A|25|"; nocase;
content:"|25|50|25|45|25|00|25|00|25|"; distance:0;
content:"|25|21|25|54|25|68|25|69|25|73|25|20|25|70|25|72|25|6f|25|67|25|72|25|61|25|6d|25|"; distance:0; nocase; fast_pattern;
target:dest_ip;
Raw source ET HUNTING Likely Hex Encoded Executable as String - Percent Separated · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET HUNTING Likely Hex Encoded Executable as String - Percent Separated";
    flow:established,to_client;
    file.data;
    content:"4D|25|5A|25|"; nocase;
    content:"|25|50|25|45|25|00|25|00|25|"; distance:0;
    content:"|25|21|25|54|25|68|25|69|25|73|25|20|25|70|25|72|25|6f|25|67|25|72|25|61|25|6d|25|"; distance:0; nocase; fast_pattern;
    reference:url,threatmon.io/apt-sidecopy-targeting-indian-government-entities/;
    classtype:bad-unknown;
    sid:2044373; 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;
)

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