ET MALWARE Cryptbot CnC DGA Domain (for4)

Query · suricata

dns.query; bsize:12;
content:"for4"; fast_pattern;
content:".top"; nocase; endswith;
pcre:"/^(?:[a-z]{2})for4(?:[a-z]{2})\x2etop$/";
Raw source ET MALWARE Cryptbot CnC DGA Domain (for4) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert dns $HOME_NET any -> any any (
    msg:"ET MALWARE Cryptbot CnC DGA Domain (for4)";
    dns.query; bsize:12;
    content:"for4"; fast_pattern;
    content:".top"; nocase; endswith;
    pcre:"/^(?:[a-z]{2})for4(?:[a-z]{2})\x2etop$/";
    reference:url,community.emergingthreats.net/t/cryptbot-stealer-update-on-rules/790/3;
    classtype:trojan-activity;
    sid:2054385; rev:1;
    metadata:attack_target Client_Endpoint, tls_state plaintext, created_at 2024_07_08, deployment Perimeter, malware_family Cryptbot, confidence High, signature_severity Major, updated_at 2024_07_08, reviewed_at 2025_04_21;
)

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.