alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Turla APT/Kazuar Backdoor CnC Activity (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.cookie; content:"AspNet.Cookies=MTY5NzM5ZTcyMTEyOTUxNDZhNjFkMzAwYzBmZWYwMmQ="; bsize:59; fast_pattern; http.request_body; content:"|3c|"; depth:1; content:"|3e 3c|"; reference:url,community.emergingthreats.net/t/new-sig-et-trojan-w32-kazuar-backdoor-turla-apt-hardcoded-cookie/1136; reference:url,unit42.paloaltonetworks.com/pensive-ursa-uses-upgraded-kazuar-backdoor; classtype:trojan-activity; sid:2049264; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_11_20, deployment Perimeter, former_category MALWARE, confidence High, signature_severity Critical, tag Turla, updated_at 2023_11_20;)

Reference
URL	http://community.emergingthreats.net/t/new-sig-et-trojan-w32-kazuar-backdoor-turla-apt-hardcoded-cookie/1136
URL	http://unit42.paloaltonetworks.com/pensive-ursa-uses-upgraded-kazuar-backdoor

Metadata
affected_product	Windows_XP_Vista_7_8_10_Server_32_64_Bit
attack_target	Client_Endpoint
created_at	2023_11_20
deployment	Perimeter
former_category	MALWARE
confidence	High
signature_severity	Critical
tag	Turla
updated_at	2023_11_20