alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Kumquat Loader Activity (Publish)"; flow:established,to_server; flowbits:isset,ET.kumquat; content:"|30|"; startswith; content:"|00 0b|iot/server"; distance:2; within:12; fast_pattern; pcre:"/^[0-9]{1}/R"; content:"|7b 0a 20 20 20 20 22 6d 73 67 22 3a 20 22|"; distance:0; within:15; reference:md5,5e68e2c7b87e0c23904987e694f5b1ee; reference:md5,bff4ce3dbda522e92970c5d1d0471e63; classtype:trojan-activity; sid:2044068; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_02_02, deployment Perimeter, malware_family Kumquat, confidence High, signature_severity Major, tag TA416, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_07_12, reviewed_at 2024_05_07; target:src_ip;)