#alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO [TGI] Possible Cobalt Strike Extra Whitespace HTTP Response"; flow:established,to_client; content:!"WEBrick"; http_header; http_start; content:"HTTP/1.1|20|200|20|OK|20 0d 0a|Content-Type|3a|"; flowbits:isnotset,ET.entrust_entelligence; threshold:type limit, track by_src, seconds 60, count 1; metadata: former_category HUNTING; reference:url,github.com/fox-it/cobaltstrike-extraneous-space; classtype:trojan-activity; sid:2029425; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, deployment Perimeter, signature_severity Major, created_at 2020_02_12, updated_at 2020_02_12;)

Added 2020-02-12 18:40:18 UTC

Topic revision: r1 - 2020-02-12 - TWikiGuest
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