Query: detection rule: Detects possible execution via LNK file accessed on a WebDAV server.
Matching passage: Sigma rule: Detects possible execution via LNK file accessed on a WebDAV server.. Logsource: windows / process_creation. Rule: title: Potentially Suspicious WebDAV LNK Execution id: 1412aa78-a24c-4abd-83df-767dfb2c5bbe related: - id: f0507c0f-a3a2-40f5-acc6-7f543c334993 type: similar status: test description: Detects possible execution via LNK file accessed on a WebDAV server. references: - https://www.trellix.com/en-us/about/newsroom/stories/research/beyond-file-search-a-novel-method.html - https://micahbabinski.medium.com/search-ms-webdav-and-chill-99c5b23ac462 author: Micah Babinski date: 2023-08-21 tags: - attack.execution - attack.t1059.001 - attack.t1204 logsource: category: process_creation product: windows detection: selection: ParentImage|endswith: \explorer.exe Image|endswith: - \cmd.exe - \cscript.exe - \mshta.exe - \powershell.exe - \pwsh.exe - \wscript.exe CommandLine|contains: \DavWWWRoot\ condition: selection falsepositives: - Unknown level: medium
Near-miss passage: Sigma rule: Detects an a non-browser process interacting with the Telegram API which could indicate use of a covert C2. Logsource: windows / network_connection. Rule: title: Suspicious Non-Browser Network Communication With Telegram API id: c3dbbc9f-ef1d-470a-a90a-d343448d5875 status: test description: Detects an a non-browser process interacting with the Telegram API which could indicate use of a covert C2 references: - https://www.ncsc.gov.uk/static-assets/documents/malware-analysis-reports/small-sieve/NCSC-MAR-Small-Sieve.pdf author: Nasreddine Bencherchali (Nextron Systems) date: 2023-05-19 tags: - attack.command-and-control - attack.exfiltration - attack.t1102 - attack.t1567 - attack.t1105 logsource: product: windows category: network_connection detection: selection: DestinationHostname|contains: api.telegram.org filter_main_brave: Image|endswith: \brave.exe filter_main_chrome: Image: - C:\Program Files\Google\Chrome\Application\chrome.exe - C:\Program Files (x86)\Google\Chrome\Application\chrome.exe filter_main_firefox: Image: - C:\Program Files\Mozilla Firefox\firefox.exe - C:\Program Files (x86)\Mozilla Firefox\firefox.exe filter_main_ie: Image: - C:\Program Files (x86)\Internet Explorer\iexplore.exe - C:\Program Files\Internet Explorer\iexplore.exe filter_main_maxthon: Image|endswith: \maxthon.exe filter_main_edge_1: - Image|startswith: C:\Program Files (x86)\Microsoft\EdgeWebView\Application\ - Image|endswith: \WindowsApps\MicrosoftEdge.exe - Image: - C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe - C:\Program Files\Microsoft\Edge\Application\msedge.exe filter_main_edge_2: Image|startswith: - C:\Program Files (x86)\Microsoft\EdgeCore\ - C:\Program Files\Microsoft\EdgeCore\ Image|endswith: - \msedge.exe - \msedgewebview2.exe filter_main_opera: Image|endswith: \opera.exe filter_main_safari: Image|endswith: \safari.exe filter_main_seamonkey: Image|endswith: \seamonkey.exe filter_main_vivaldi: Image|endswith: \vivaldi.exe filter_main_whale: Image|endswith: \whale.exe condition: selection and not 1 of filter_main_* falsepositives: - Legitimate applications communicating with the Telegram API e.g. web browsers not in the exclusion list, app with an RSS etc. level: medium