Rule History

SID: 2610518 • Source: tgreen/hunting

Versions (4)

Version DetailsCurrent

Rev: 1 • Mar 19, 2025, 4:38 PM

Message:

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

Rule:

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;)

Created:

Mar 19, 2025, 4:38 PM

Updated:

Mar 19, 2025, 4:38 PM

DB Created:

Jul 29, 2025, 5:35 PM

DB Updated:

Jul 29, 2025, 5:35 PM

Filename:

hunting.rules