alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE JanelaRAT CnC Checkin Observed"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"?op="; pcre:"/^\d\x7c\d\x7c\d\x7c\d/R"; content:"&us="; content:"&nm="; content:"&vs="; http.user_agent; content:"VisaoAPP"; fast_pattern; http.header_names; content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; reference:url,www.zscaler.com/blogs/security-research/janelarat-repurposed-bx-rat-variant-targeting-latam-fintech; classtype:trojan-activity; sid:2047646; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_08_14, deployment Perimeter, former_category RETIRED, malware_family JanelaRAT, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_06_03, reviewed_at 2024_10_01; target:src_ip;)