ET MALWARE Win32/I'm_Better Stealer CnC Checkin

Query · suricata

flow:established,to_server;
dsize:60;
content:"SFdJRDoge"; startswith; fast_pattern;
base64_decode:bytes 60, offset 0;
base64_data;
content:"HWID|3a 20 7b|";
pcre:"/^[a-f0-9]{8}-(?:[a-f0-9]{4}-){3}[a-f0-9]{12}\x7d/R";
Raw source ET MALWARE Win32/I'm_Better Stealer 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 any (
    msg:"ET MALWARE Win32/I'm_Better Stealer CnC Checkin";
    flow:established,to_server;
    dsize:60;
    content:"SFdJRDoge"; startswith; fast_pattern;
    base64_decode:bytes 60, offset 0;
    base64_data;
    content:"HWID|3a 20 7b|";
    pcre:"/^[a-f0-9]{8}-(?:[a-f0-9]{4}-){3}[a-f0-9]{12}\x7d/R";
    reference:md5,e9df653567149f789852c2dab16f46bb;
    reference:url,www.bridewell.com/insights/news/detail/threat-advisory-bridewell-malware-impersonating-online-tools-and-video-games;
    classtype:trojan-activity;
    sid:2044552; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_03_09, deployment Perimeter, malware_family Win32_I_m_Better, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_09;
)

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