ET MALWARE Fickle Stealer C2 Server Tasking

Query · suricata

flow:established,to_client;
http.stat_code;
content:"200";
file.data;
content:"|7b 22|status|22 3a 20 22|Success|22 2c 20 22|k|22 3a 20 22|"; startswith; fast_pattern;
pcre:"/^[a-zA-Z0-9]{5,15}\x22\x2c\x20/R";
content:"|22|c|22 3a|"; within:4;
target:dest_ip;
Raw source ET MALWARE Fickle Stealer C2 Server Tasking · 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 MALWARE Fickle Stealer C2 Server Tasking";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    file.data;
    content:"|7b 22|status|22 3a 20 22|Success|22 2c 20 22|k|22 3a 20 22|"; startswith; fast_pattern;
    pcre:"/^[a-zA-Z0-9]{5,15}\x22\x2c\x20/R";
    content:"|22|c|22 3a|"; within:4;
    reference:url,e9bc44cf548a70e7285499209973faf44b7374dece1413dfcdc03bf25a6c599c;
    reference:md5,75b9ef9142a78671d449c8d22ab6be14;
    classtype:trojan-activity;
    sid:2053779; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_06_20, deployment Perimeter, malware_family Fickle_Stealer, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_06_20;
    target:dest_ip;
)

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