ET MALWARE MSIL/PSW.Agent.SUD Zipped Data Exfil

Query · suricata

flow:established,to_server;
stream_size:server,<,20;
dsize:1024;
flowbits:isset,ET.wacatacstealer;
content:"|23 23 23|"; startswith; fast_pattern;
content:"|23 23 23|"; distance:0; within:20;
content:"|23 23 23|"; distance:0; within:86;
pcre:"/^###\d+###[a-zA-Z0-9\-\.]{2,63}###\x00+$/";

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source ET MALWARE MSIL/PSW.Agent.SUD Zipped Data Exfil · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp-pkt $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE MSIL/PSW.Agent.SUD Zipped Data Exfil";
    flow:established,to_server;
    stream_size:server,<,20;
    dsize:1024;
    flowbits:isset,ET.wacatacstealer;
    content:"|23 23 23|"; startswith; fast_pattern;
    content:"|23 23 23|"; distance:0; within:20;
    content:"|23 23 23|"; distance:0; within:86;
    pcre:"/^###\d+###[a-zA-Z0-9\-\.]{2,63}###\x00+$/";
    reference:md5,023e3c7d1de10006b4c52d09aadefc1f;
    classtype:credential-theft;
    sid:2037240; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_06_30, deployment Perimeter, malware_family MSIL_PSW_Agent_SUD, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_30, reviewed_at 2024_12_11;
)

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