alert http any any -> $HOME_NET any (msg:"ET EXPLOIT Shenzhen TVT DVR/NVR/IPC Stack Overflow in Base64 Authorization Mechanism M1"; flow:established,to_server; http.method; content:"POST"; http.header; content:"Authorization|3a 20|Basic|20|YWRtaW46"; fast_pattern; content:!"|0d 0a|"; within:500; http.request_body; content:"|3c 3f|xml|20|"; startswith; content:"clientType|3d 22|WEB|22|"; distance:0; reference:url,github.com/mcw0/PoC/blob/master/TVT_and_OEM_IPC_NVR_DVR_RCE_Backdoor_and_Information_Disclosure.txt; classtype:attempted-admin; sid:2036255; rev:1; metadata:affected_product DVR, attack_target Networking_Equipment, created_at 2022_04_19, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_19;)