ET MALWARE Win32/BugSleep Command Response From C2

Query · suricata

flow:established,to_client;
xbits:isset,ET.BugSleep.C2,track ip_src;
content:"|03 03 03|"; offset:5; depth:3; fast_pattern;
pcre:"/^.{4}[\x01\x02\x03\x04\x05\x06\x07\x09\x0a\x0b\x0c\x0d\x0e\x61\x62\x63\x64\x65\x66]\x03\x03\x03/";
target:dest_ip;

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 Win32/BugSleep Command Response From C2 · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $EXTERNAL_NET 443 -> $HOME_NET any (
    msg:"ET MALWARE Win32/BugSleep Command Response From C2";
    flow:established,to_client;
    xbits:isset,ET.BugSleep.C2,track ip_src;
    content:"|03 03 03|"; offset:5; depth:3; fast_pattern;
    pcre:"/^.{4}[\x01\x02\x03\x04\x05\x06\x07\x09\x0a\x0b\x0c\x0d\x0e\x61\x62\x63\x64\x65\x66]\x03\x03\x03/";
    reference:url,blog.talosintelligence.com/writing-a-bugsleep-c2-server/;
    reference:url,blog.sekoia.io/muddywater-replaces-atera-by-custom-muddyrot-implant-in-a-recent-campaign/;
    reference:url,research.checkpoint.com/2024/new-bugsleep-backdoor-deployed-in-recent-muddywater-campaigns/;
    classtype:trojan-activity;
    sid:2057161; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_and_Server, tls_state plaintext, created_at 2024_10_30, deployment Perimeter, deployment Internal, malware_family Win32_BugSleep, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_10_30;
    target:dest_ip;
)

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