alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/BLUELIGHT OAuth Login Attempt M2"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/oauth20_token.srf"; bsize:18; nocase; http.user_agent; content:"Myapp"; fast_pattern; http.request_body; content:"client_id="; startswith; content:"&client_secret="; distance:36; within:15; content:"&refresh_token="; distance:0; http.header_names; content:!"|0d 0a|Accept"; content:!"|0d 0a|Referer|0d 0a|"; reference:md5,0b649bc5dbbf21801c21aaa5e5f79fc6; reference:url,www.volexity.com/blog/2021/08/17/north-korean-apt-inkysquid-infects-victims-using-browser-exploits; classtype:trojan-activity; sid:2033741; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_08_18, deployment Perimeter, malware_family BLUELIGHT, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_12;)