ET MALWARE PackClient RAT Desktop Screen Capture Exfiltration

Query · suricata

flow:established,to_server;
content:"|40 5a 12 00 00 00|PV10"; depth:12; fast_pattern;
content:"|ff d8 ff e0|"; within:10;
content:"JFIF"; within:8;
byte_jump:2,0,from_beginning,little,post_offset 3;
isdataat:!2,relative;
target:src_ip;
Raw source ET MALWARE PackClient RAT Desktop Screen Capture Exfiltration · 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 PackClient RAT Desktop Screen Capture Exfiltration";
    flow:established,to_server;
    content:"|40 5a 12 00 00 00|PV10"; depth:12; fast_pattern;
    content:"|ff d8 ff e0|"; within:10;
    content:"JFIF"; within:8;
    byte_jump:2,0,from_beginning,little,post_offset 3;
    isdataat:!2,relative;
    reference:md5,c55f9bc3c53ac32e6169ad3cc8b2ce49;
    classtype:trojan-activity;
    sid:2069890; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state plaintext, created_at 2026_06_10, deployment Perimeter, malware_family PackClient_RAT, performance_impact Low, confidence High, signature_severity Major, tag RAT, updated_at 2026_06_10;
    target:src_ip;
)

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.