ET EXPLOIT GTPDoor Trigger Packet Request

Query · suricata

flow:stateless,to_server;
content:"|01|"; offset:1; depth:1;
content:"|72 1f 18 08|"; distance:15; within:4; fast_pattern;
xbits:set,ET.gptdoor.udp,track ip_pair,expire 10;
threshold:type limit,track by_src,count 1,seconds 600;
target:dest_ip;

Rule dependencies

Feeds into

  • 1 rule read ET.gptdoor.udp · view all
Raw source ET EXPLOIT GTPDoor Trigger Packet Request · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert udp any any -> any 2123 (
    msg:"ET EXPLOIT GTPDoor Trigger Packet Request";
    flow:stateless,to_server;
    content:"|01|"; offset:1; depth:1;
    content:"|72 1f 18 08|"; distance:15; within:4; fast_pattern;
    xbits:set,ET.gptdoor.udp,track ip_pair,expire 10;
    threshold:type limit,track by_src,count 1,seconds 600;
    reference:url,doubleagent.net/telecommunications/backdoor/gtp/2024/02/27/GTPDOOR-COVERT-TELCO-BACKDOOR;
    reference:url,github.com/sud0woodo/detect_gtpdoor;
    classtype:trojan-activity;
    sid:2063367; rev:1;
    metadata:affected_product Linux, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_07_09, deployment Internal, deployment Datacenter, malware_family GTPDoor, confidence Medium, signature_severity Major, updated_at 2025_07_09, mitre_tactic_id TA0008, mitre_tactic_name Lateral_Movement, mitre_technique_id T1210, mitre_technique_name Exploitation_Of_Remote_Services;
    target:dest_ip;
)

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