ET MALWARE Pingback OK Issued

Query · suricata

icmp_seq:53764;
itype:0;
content:"OK"; startswith;
Raw source ET MALWARE Pingback OK Issued · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert icmp $EXTERNAL_NET any -> any any (
    msg:"ET MALWARE Pingback OK Issued";
    icmp_seq:53764;
    itype:0;
    content:"OK"; startswith;
    reference:url,www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/backdoor-at-the-end-of-the-icmp-tunnel/;
    reference:md5,264c2ede235dc7232d673d4748437969;
    classtype:trojan-activity;
    sid:2032935; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2021_05_10, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_08_28;
)

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.