ET MALWARE Observed Cobalt Strike CnC Domain (www .msfthelpdesk .com in TLS SNI)
Sourceet/open
CreatedAugust 2, 2021
UpdatedAugust 2, 2021
Classificationdomain-c2
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Cobalt Strike CnC Domain (www .msfthelpdesk .com in TLS SNI)"; flow:established,to_server; tls.sni; content:"www.msfthelpdesk.com"; bsize:20; fast_pattern; reference:md5,37c44fe692371563ebc10fade5142918; reference:url,twitter.com/mojoesec/status/1421198691742986243; classtype:domain-c2; sid:2033644; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_08_02, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_08_02, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)
References
| md5 | 37c44fe692371563ebc10fade5142918 |
| url | twitter.com/mojoesec/status/1421198691742986243 |
Metadata
attack targetClient_Endpoint
created at2021_08_02
deploymentPerimeter
performance impactLow
confidenceHigh
signature severityMajor
tagDescription_Generated_By_Proofpoint_Nexus
updated at2021_08_02
mitre tactic idTA0011
mitre tactic nameCommand_And_Control
mitre technique idT1071
mitre technique nameApplication_Layer_Protocol
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