ET MALWARE Snake Keylogger Exfil via SMTP (VIP Recovery)

alert smtp $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Snake Keylogger Exfil via SMTP (VIP Recovery)";
    flow:established,to_server;
    content:"Subject|3a 20 20|Pc|20|Name|3a 20|";
    content:"|7c 20 2f 20|VIP|20|Recovery|20 5c|"; distance:0; fast_pattern;
    content:"PC|20|Name|3a|"; distance:0;
    content:"Date|20|and|20|Time|3a 20|"; distance:0;
    content:"Recovered|20|From|3a 20|"; distance:0;
    reference:url,x.com/malware_traffic/status/1889731681197646128;
    reference:md5,edc77a3a2fe5e59ba1de35b548fe3528;
    reference:url,github.com/Security-Onion-Solutions/securityonion/discussions/13693;
    classtype:command-and-control;
    sid:2060048; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2025_02_12, deployment Perimeter, malware_family Snake_Keylogger, confidence High, signature_severity Critical, tag c2, updated_at 2025_02_12, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
)