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Rev: 2 • Feb 12, 2020, 12:00 PMET HUNTING [TGI] Possible Cobalt Strike Extra Whitespace HTTP Response
alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET HUNTING [TGI] Possible Cobalt Strike Extra Whitespace HTTP Response"; flow:established,to_client; flowbits:isnotset,ET.entrust_entelligence; http.start; content:"HTTP/1.1|20|200|20|OK|20 0d 0a|Content-Type|3a|"; reference:url,github.com/fox-it/cobaltstrike-extraneous-space; classtype:trojan-activity; sid:2029425; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_02_12, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_02_12;)
Feb 12, 2020, 12:00 PM
Feb 12, 2020, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 22, 2025, 9:34 PM
rules/emerging-hunting.rules