ET MALWARE Observed Malicious Cobalt Strike SSL Cert (setupfastonline .com)

7.0.35.0SID: 2034403Rev: 2Disabled0 views
Sourceet/open
Fileemerging-malware.rules
CreatedNovember 10, 2021
UpdatedMarch 26, 2024
Classificationdomain-c2
alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Observed Malicious Cobalt Strike SSL Cert (setupfastonline .com)"; flow:established,to_client; tls.cert_subject; bsize:22; content:"CN=setupfastonline.com"; fast_pattern; reference:url,www.cert.ssi.gouv.fr/uploads/CERTFR-2021-CTI-009.pdf; classtype:domain-c2; sid:2034403; rev:2; metadata:attack_target Client_Endpoint, created_at 2021_11_10, deployment Perimeter, malware_family Cobalt_Strike, confidence Medium, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_26;)

References

urlwww.cert.ssi.gouv.fr/uploads/CERTFR-2021-CTI-009.pdf

Metadata

attack targetClient_Endpoint
created at2021_11_10
deploymentPerimeter
malware familyCobalt_Strike
confidenceMedium
signature severityMajor
tagDescription_Generated_By_Proofpoint_Nexus
updated at2024_03_26

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