alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MSIL/Monitor.PCTattletale.A Checkin (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:23; content:"/Prod/api/pctt/devices/"; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; content:!"|0d 0a|user-agent|0d 0a|"; http.request_body; content:"{|22|MemberID|22 3a|"; startswith; content:"|22 2c 22|DeviceName|22 3a 22|"; distance:0; content:"|22 2c 22|DeviceDescription|22 3a 22|"; distance:0; content:"|22 2c 22|SoftwareVersion|22 3a 22|"; distance:0; reference:md5,d76d32487a84bb529a94ee39444f8212; reference:url,www.vice.com/en/article/m7ezj8/stalkerware-leaking-phone-screenshots-pctattletale; classtype:trojan-activity; sid:2034013; rev:3; metadata:attack_target Client_Endpoint, created_at 2021_09_23, deployment Perimeter, deployment SSLDecrypt, malware_family MSIL_Monitor_PCTattletale_A, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_30;)