TGI HUNT Possible Cobalt Strike Malleable C2 Null Response (Flowbit Set)

SID: 2610518Rev: 116 views
History
Sourcetgreen/hunting
CreatedMarch 19, 2025
UpdatedMarch 19, 2025
Classificationtrojan-activity
alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"TGI HUNT Possible Cobalt Strike Malleable C2 Null Response (Flowbit Set)"; flow:established,to_server; content:"!microsoft.com"; http_host; endswith; http_header_names; content:!"Referer"; content:"Cookie"; flowbits:set,hunt.cs_null_response; flowbits:noalert; threshold:type limit, track by_src, seconds 60, count 1; classtype:trojan-activity; sid:2610518; rev:1;)

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