ET MALWARE Interlock RAT CnC Checkin

Query · suricata

flow:established,to_server;
content:"|55 11 69 df 7b 22 69 70 74 61 72 67 65 74 22 3a|"; startswith; fast_pattern;
content:"|22 64 6f 6d 61 69 6e 22 3a|"; distance:0;
content:"|22 70 63 6e 61 6d 65 22 3a|"; distance:0;
content:"|22 72 75 6e 61 73 22 3a|"; distance:0;
content:"|22 74 79 70 65 66 22 3a|"; distance:0;
content:"|22 76 65 72 6f 73 22 3a|"; distance:0;
Raw source ET MALWARE Interlock RAT CnC Checkin · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $HOME_NET any -> $EXTERNAL_NET 443 (
    msg:"ET MALWARE Interlock RAT CnC Checkin";
    flow:established,to_server;
    content:"|55 11 69 df 7b 22 69 70 74 61 72 67 65 74 22 3a|"; startswith; fast_pattern;
    content:"|22 64 6f 6d 61 69 6e 22 3a|"; distance:0;
    content:"|22 70 63 6e 61 6d 65 22 3a|"; distance:0;
    content:"|22 72 75 6e 61 73 22 3a|"; distance:0;
    content:"|22 74 79 70 65 66 22 3a|"; distance:0;
    content:"|22 76 65 72 6f 73 22 3a|"; distance:0;
    reference:url,blog.sekoia.io/interlock-ransomware-evolving-under-the-radar/;
    reference:md5,7a5af6b8cc4b94cf0af8ae8bd56224f3;
    classtype:trojan-activity;
    sid:2062408; rev:1;
    metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_05_16, deployment Perimeter, malware_family Interlock, confidence High, signature_severity Major, tag RAT, updated_at 2025_05_16;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.