Query: alert when Detects an executable, which is not an internet browser or known application, initiating network connections to legit po
Matching passage: Sigma rule: Detects an executable, which is not an internet browser or known application, initiating network connections to legit po. Logsource: windows / network_connection. Rule: title: New Connection Initiated To Potential Dead Drop Resolver Domain id: 297ae038-edc2-4b2e-bb3e-7c5fc94dd5c7 related: - id: d7b09985-95a3-44be-8450-b6eadf49833e type: obsolete - id: 8b48ad89-10d8-4382-a546-50588c410f0d type: similar - id: d635249d-86b5-4dad-a8c7-d7272b788586 type: similar - id: 52182dfb-afb7-41db-b4bc-5336cb29b464 type: similar - id: ae02ed70-11aa-4a22-b397-c0d0e8f6ea99 type: similar - id: e0f8ab85-0ac9-423b-a73a-81b3c7b1aa97 type: similar - id: 7b434893-c57d-4f41-908d-6a17bf1ae98f type: similar - id: 8518ed3d-f7c9-4601-a26c-f361a4256a0c type: similar - id: 42a5f1e7-9603-4f6d-97ae-3f37d130d794 type: similar - id: 56454143-524f-49fb-b1c6-3fb8b1ad41fb type: similar - id: b6e04788-29e1-4557-bb14-77f761848ab8 type: similar - id: a0d7e4d2-bede-4141-8896-bc6e237e977c type: similar status: test description: 'Detects an executable, which is not an internet browser or known application, initiating network connections to legit popular websites, which were seen to be used as dead drop resolvers in previous attacks. In this context attackers leverage known websites such as "facebook", "youtube", etc. In order to pass through undetected. ' references: - https://web.archive.org/web/20220830134315/https://content.fireeye.com/apt-41/rpt-apt41/ - https://securelist.com/the-tetrade-brazilian-banking-malware/97779/ - https://blog.bushidotoken.net/2021/04/dead-drop-resolvers-espionage-inspired.html - https://github.com/kleiton0x00/RedditC2 - https://twitter.com/kleiton0x7e/status/1600567316810551296 - https://www.linkedin.com/posts/kleiton-kurti_github-kleiton0x00redditc2-abusing-reddit-activity-7009939662462984192-5DbI/?originalSubdomain=al author: Sorina Ionescu, X__Junior (Nextron Systems) date: 2022-08-17 modified: 2026-03-29 tags: - attack.command-and-control - attack.t1102 - attack.t1102.001 logsource: category: network_connection product: windows detection: selection: Initiated: 'true' DestinationHostname|endswith: - .t.me - 0x0.st - 4shared.com - abuse.ch - anonfiles.com - bashupload.com - cdn.discordapp.com - chunk.io - cloudflare.com - ddns.net - discord.com - docs.google.com - drive.google.com - dropbox.com - dropmefiles.com - facebook.com - feeds.rapidfeeds.com - fotolog.com - ghostbin.co/ - githubusercontent.com - gofile.io - hastebin.com - imgur.com - livejournal.com - mediafire.com - mega.co.nz - mega.nz - onedrive.com - pages.dev - paste.ee - pastebin.com - pastebin.pl - pastetext.net - pixeldrain.com - privatlab.com - privatlab.net - reddi
Near-miss passage: Sigma rule: Alert on when a user has performed an eDiscovery search or exported a PST file from the search. This PST file usually ha. Logsource: m365 / threat_management. Rule: title: PST Export Alert Using eDiscovery Alert id: 18b88d08-d73e-4f21-bc25-4b9892a4fdd0 related: - id: 6897cd82-6664-11ed-9022-0242ac120002 type: similar status: test description: Alert on when a user has performed an eDiscovery search or exported a PST file from the search. This PST file usually has sensitive information including email body content references: - https://learn.microsoft.com/en-us/microsoft-365/compliance/alert-policies?view=o365-worldwide author: Sorina Ionescu date: 2022-02-08 modified: 2022-11-17 tags: - attack.collection - attack.t1114 logsource: service: threat_management product: m365 definition: Requires the 'eDiscovery search or exported' alert to be enabled detection: selection: eventSource: SecurityComplianceCenter eventName: eDiscovery search started or exported status: success condition: selection falsepositives: - PST export can be done for legitimate purposes but due to the sensitive nature of its content it must be monitored. level: medium