Versions (4)
Version DetailsCurrent
Rev: 1 • Sep 7, 2023, 12:00 PMET MALWARE Win32/Bumblebee Loader Checkin Activity (set)
alert tcp-pkt $HOME_NET any -> $EXTERNAL_NET 443 (msg:"ET MALWARE Win32/Bumblebee Loader Checkin Activity (set)"; flow:established,to_server; flowbits:set,et.bumblebee; flowbits:noalert; dsize:4; content:"|00 00 00|"; endswith; fast_pattern; reference:md5,270103c51888a8e98972283c825d84cd; classtype:trojan-activity; sid:2047945; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_09_07, deployment Perimeter, malware_family Win32_Bumblebee, performance_impact Moderate, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_09_07, reviewed_at 2024_04_08; target:src_ip;)
Sep 7, 2023, 12:00 PM
Sep 7, 2023, 12:00 PM
Sep 7, 2023, 9:00 PM
Aug 18, 2025, 8:35 PM
rules/emerging-malware.rules