ET MALWARE Observed Cobalt Strike Related Domain (cdnwin .xyz in TLS SNI)

7.0.35.0SID: 2034304Rev: 2Disabled3 views
Sourceet/open
Fileemerging-malware.rules
CreatedOctober 29, 2021
UpdatedMarch 26, 2024
Classificationdomain-c2
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Cobalt Strike Related Domain (cdnwin .xyz in TLS SNI)"; flow:established,to_server; tls.sni; bsize:10; content:"cdnwin.xyz"; fast_pattern; reference:url,thedfirreport.com/2021/10/18/icedid-to-xinglocker-ransomware-in-24-hours/; classtype:domain-c2; sid:2034304; rev:2; metadata:attack_target Client_Endpoint, created_at 2021_10_29, deployment Perimeter, malware_family Cobalt_Strike, confidence High, signature_severity Major, tag c2, updated_at 2024_03_26, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)

References

urlthedfirreport.com/2021/10/18/icedid-to-xinglocker-ransomware-in-24-hours/

Metadata

attack targetClient_Endpoint
created at2021_10_29
deploymentPerimeter
malware familyCobalt_Strike
confidenceHigh
signature severityMajor
tagc2
updated at2024_03_26
mitre tactic idTA0010
mitre tactic nameExfiltration
mitre technique idT1041
mitre technique nameExfiltration_Over_C2_Channel

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