ET MALWARE Observed TA399/Sidewinder APT Domain (president-gov-lk .donwloaded .net in TLS SNI)
Sourceet/open
CreatedAugust 8, 2024
UpdatedApril 15, 2025
Classificationtrojan-activity
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed TA399/Sidewinder APT Domain (president-gov-lk .donwloaded .net in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".president-gov-lk.donwloaded.net"; endswith; fast_pattern; reference:md5,43d35b5b20f491be219ab2eaa172ec55; classtype:trojan-activity; sid:2055136; rev:2; metadata:attack_target Client_Endpoint, created_at 2024_08_08, deployment Perimeter, deprecation_reason Age, confidence High, signature_severity Major, tag Sidewinder, tag TA399, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_04_15, reviewed_at 2025_04_15, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)
References
| md5 | 43d35b5b20f491be219ab2eaa172ec55 |
Metadata
attack targetClient_Endpoint
created at2024_08_08
deploymentPerimeter
deprecation reasonAge
confidenceHigh
signature severityMajor
tagDescription_Generated_By_Proofpoint_Nexus
updated at2025_04_15
reviewed at2025_04_15
mitre tactic idTA0011
mitre tactic nameCommand_And_Control
mitre technique idT1071
mitre technique nameApplication_Layer_Protocol
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