ET EXPLOIT Possible WatchGuard CVE-2022-26318 RCE Attempt M3

Query · suricata

flow:established,to_server;
http.request_line;
content:"POST /agent/login"; startswith; fast_pattern;
http.content_len;
byte_test:0,>,450,0,string,dec;
http.header;
content:"Content-Encoding|3a 20|gzip";
http.request_body;
content:"|1f 8b|"; startswith;
Raw source ET EXPLOIT Possible WatchGuard CVE-2022-26318 RCE Attempt M3 · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET EXPLOIT Possible WatchGuard CVE-2022-26318 RCE Attempt M3";
    flow:established,to_server;
    http.request_line;
    content:"POST /agent/login"; startswith; fast_pattern;
    http.content_len;
    byte_test:0,>,450,0,string,dec;
    http.header;
    content:"Content-Encoding|3a 20|gzip";
    http.request_body;
    content:"|1f 8b|"; startswith;
    reference:url,attackerkb.com/topics/t8Nrnu99ZE/cve-2022-26318;
    reference:url,www.greynoise.io/blog/watchguard-cve-2022-26318-rce-detection-iocs-and-prevention-for-defenders;
    reference:cve,2022-26318;
    classtype:attempted-admin;
    sid:2035635; rev:2;
    metadata:attack_target Networking_Equipment, created_at 2022_03_29, cve CVE_2022_26318, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag CISA_KEV, updated_at 2022_03_29;
)

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