{"id":"66474410-b883-415f-9f8d-75345a0a66a6","title":"DNS Query To MEGA Hosting Website - DNS Client","description":"Detects DNS queries for subdomains related to MEGA sharing website","author":"Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"medium","date":"2023-01-16","modified":"","tags":["attack.exfiltration","attack.t1567.002"],"technique_ids":["T1567.002"],"logsource":{"product":"windows","service":"dns-client","definition":"Requirements: Microsoft-Windows-DNS Client Events/Operational Event Log must be enabled/collected in order to receive the events."},"falsepositives":["Legitimate DNS queries and usage of Mega"],"references":["https://research.nccgroup.com/2021/05/27/detecting-rclone-an-effective-tool-for-exfiltration/"],"source_path":"rules/windows/builtin/dns_client/win_dns_client_mega_nz.yml","source_sha256":"0b285b443c3c775f4a61de1bc790bca96be6db0d1ed7dc09e1cbaa0c93336282","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/builtin/dns_client/win_dns_client_mega_nz.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: DNS Query To MEGA Hosting Website - DNS Client\nid: 66474410-b883-415f-9f8d-75345a0a66a6\nrelated:\n    - id: 613c03ba-0779-4a53-8a1f-47f914a4ded3\n      type: similar\nstatus: test\ndescription: Detects DNS queries for subdomains related to MEGA sharing website\nreferences:\n    - https://research.nccgroup.com/2021/05/27/detecting-rclone-an-effective-tool-for-exfiltration/\nauthor: Nasreddine Bencherchali (Nextron Systems)\ndate: 2023-01-16\ntags:\n    - attack.exfiltration\n    - attack.t1567.002\nlogsource:\n    product: windows\n    service: dns-client\n    definition: 'Requirements: Microsoft-Windows-DNS Client Events/Operational Event Log must be enabled/collected in order to receive the events.'\ndetection:\n    selection:\n        EventID: 3008\n        QueryName|contains: 'userstorage.mega.co.nz'\n    condition: selection\nfalsepositives:\n    - Legitimate DNS queries and usage of Mega\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1567.002","id":"T1567.002","name":"Exfiltration to Cloud Storage","page":"techniques/enterprise/T1567.002/"}],"data_path":"data/detection-rules/66474410-b883-415f-9f8d-75345a0a66a6.json","kind":"sigma"}