ET MALWARE Win32/Suspected Reverse Shell Connection

Query · suricata

flow:established,to_server;
content:"Microsoft|20|Windows|20|";
content:"|5b|Version|20|"; distance:0;
content:"|5d|";
content:"|20|Microsoft|20|Corp"; fast_pattern;
content:"|43 3a 5c|";
content:"|3e|";
content:!"Host";
Raw source ET MALWARE Win32/Suspected Reverse Shell Connection · 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/Suspected Reverse Shell Connection";
    flow:established,to_server;
    content:"Microsoft|20|Windows|20|";
    content:"|5b|Version|20|"; distance:0;
    content:"|5d|";
    content:"|20|Microsoft|20|Corp"; fast_pattern;
    content:"|43 3a 5c|";
    content:"|3e|";
    content:!"Host";
    reference:url,github.com/eset/malware-ioc/tree/master/donot;
    reference:url,www.welivesecurity.com/2022/01/18/donot-go-do-not-respawn/;
    reference:md5,039d8e77b65faae44d5e7e39d4cc9c59;
    classtype:trojan-activity;
    sid:2034945; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2022_01_19, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_26;
)

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.