ET MALWARE UNK_MonkeyWrench Exfil via SMTP

Query · suricata

flow:established,to_server;
content:"Subject|3a 20|AnyDesk|20|"; fast_pattern;
content:"filename|3d 22|AnyDesk|2e|rar|22|";
target:src_ip;
Raw source ET MALWARE UNK_MonkeyWrench Exfil via SMTP · 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 [587,25] (
    msg:"ET MALWARE UNK_MonkeyWrench Exfil via SMTP";
    flow:established,to_server;
    content:"Subject|3a 20|AnyDesk|20|"; fast_pattern;
    content:"filename|3d 22|AnyDesk|2e|rar|22|";
    reference:md5,664a7f2d21f20f4a9747981145cb1332;
    classtype:trojan-activity;
    sid:2068527; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2026_04_01, deployment Perimeter, confidence High, signature_severity Critical, tag c2, tag Description_Generated_By_Proofpoint_Nexus, tag UNK_MonkeyWrench, updated_at 2026_04_01, mitre_tactic_id TA0037, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
    target:src_ip;
)

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