ET HUNTING [TGI] Possible Cobalt Strike Extra Whitespace HTTP Response

7.0.35.0SID: 2029425Rev: 3Disabled1 views
Sourceet/open
Fileemerging-hunting.rules
CreatedFebruary 12, 2020
UpdatedApril 4, 2024
Classificationtrojan-activity
alert http1 $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:3; 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 2024_04_04;)

References

urlgithub.com/fox-it/cobaltstrike-extraneous-space

Metadata

affected productWindows_XP_Vista_7_8_10_Server_32_64_Bit
attack targetClient_Endpoint
created at2020_02_12
deploymentPerimeter
confidenceMedium
signature severityMajor
tagDescription_Generated_By_Proofpoint_Nexus
updated at2024_04_04

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