alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE QuickBooks Pop-Up Scam - Pop-Up Details Request"; flow:established,to_server; http.method; content:"GET"; http.uri; bsize:21; content:"/api/get-notification"; http.header_names; content:"|0d 0a|access-token|0d 0a|"; content:"|0d 0a|user-token-id|0d 0a|"; threshold:type limit, count 1, track by_src, seconds 600; reference:md5,2254df2f656b76071da28131b4eca9c4; reference:url,www.esentire.com/blog/threat-actors-using-fake-quickbooks-software-to-scam-organizations; classtype:command-and-control; sid:2049224; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_11_16, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_11_16; target:src_ip;)