Query: detect Detects suspicious parent processes that should not have any children or should only have a single possible child progra in logs
Matching passage: Sigma rule: Detects suspicious parent processes that should not have any children or should only have a single possible child progra. Logsource: windows / process_creation. Rule: title: Suspicious Process Parents id: cbec226f-63d9-4eca-9f52-dfb6652f24df status: test description: Detects suspicious parent processes that should not have any children or should only have a single possible child program references: - https://twitter.com/x86matthew/status/1505476263464607744?s=12 - https://svch0st.medium.com/stats-from-hunting-cobalt-strike-beacons-c17e56255f9b author: Florian Roth (Nextron Systems) date: 2022-03-21 modified: 2022-09-08 tags: - attack.stealth - attack.t1036 logsource: category: process_creation product: windows detection: selection: ParentImage|endswith: - \minesweeper.exe - \winver.exe - \bitsadmin.exe selection_special: ParentImage|endswith: - \csrss.exe - \certutil.exe - \eventvwr.exe - \calc.exe - \notepad.exe filter_special: Image|endswith: - \WerFault.exe - \wermgr.exe - \conhost.exe - \mmc.exe - \win32calc.exe - \notepad.exe filter_null: Image: null condition: selection or ( selection_special and not 1 of filter_* ) falsepositives: - Unknown level: high
Near-miss passage: Sigma rule: Detects the creation of a suspicious ADS (Alternate Data Stream) file by software other than browsers. Logsource: windows / create_stream_hash. Rule: title: Creation Of a Suspicious ADS File Outside a Browser Download id: 573df571-a223-43bc-846e-3f98da481eca status: test description: Detects the creation of a suspicious ADS (Alternate Data Stream) file by software other than browsers references: - https://www.bleepingcomputer.com/news/security/exploited-windows-zero-day-lets-javascript-files-bypass-security-warnings/ author: frack113 date: 2022-10-22 modified: 2023-06-12 tags: - attack.stealth logsource: product: windows category: create_stream_hash detection: selection: Contents|startswith: '[ZoneTransfer] ZoneId=3' TargetFilename|endswith: :Zone.Identifier TargetFilename|contains: - .exe - .scr - .bat - .cmd - .docx - .hta - .jse - .lnk - .pptx - .ps - .reg - .sct - .vb - .wsc - .wsf - .xlsx filter_optional_brave: Image|endswith: \brave.exe filter_optional_chrome: Image: - C:\Program Files\Google\Chrome\Application\chrome.exe - C:\Program Files (x86)\Google\Chrome\Application\chrome.exe filter_optional_firefox: Image: - C:\Program Files\Mozilla Firefox\firefox.exe - C:\Program Files (x86)\Mozilla Firefox\firefox.exe filter_optional_ie: Image: - C:\Program Files (x86)\Internet Explorer\iexplore.exe - C:\Program Files\Internet Explorer\iexplore.exe filter_optional_maxthon: Image|endswith: \maxthon.exe filter_optional_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_optional_edge_2: Image|startswith: - C:\Program Files (x86)\Microsoft\EdgeCore\ - C:\Program Files\Microsoft\EdgeCore\ Image|endswith: - \msedge.exe - \msedgewebview2.exe filter_optional_opera: Image|endswith: \opera.exe filter_optional_safari: Image|endswith: \safari.exe filter_optional_seamonkey: Image|endswith: \seamonkey.exe filter_optional_vivaldi: Image|endswith: \vivaldi.exe filter_optional_whale: Image|endswith: \whale.exe filter_optional_snipping_tool: Image|startswith: C:\Program Files\WindowsApps\Microsoft.ScreenSketch_ Image|endswith: \SnippingTool\SnippingTool.exe TargetFilename|startswith: C:\Users\ TargetFilename|contains|all: - \AppData\Local\Packages\Microsoft.ScreenSketch_ - '\TempState\Screenshot ' TargetFilename|endswith: .png:Zone.Identifier condition: selection and not 1 of filter_optional_* falsepositives: - Other legitimate browsers not currently included in the filter (please add them) - Legitimate d