Query: Sigma rule for Detects the deletion of the "Zone.Identifier" ADS by an uncommon process. Attackers can leverage this in order to bypass
Matching passage: Sigma rule: Detects the deletion of the "Zone.Identifier" ADS by an uncommon process. Attackers can leverage this in order to bypass. Logsource: windows / file_delete. Rule: title: ADS Zone.Identifier Deleted By Uncommon Application id: 3109530e-ab47-4cc6-a953-cac5ebcc93ae related: - id: 7eac0a16-5832-4e81-865f-0268a6d19e4b type: similar status: test description: Detects the deletion of the "Zone.Identifier" ADS by an uncommon process. Attackers can leverage this in order to bypass security restrictions that make use of the ADS such as Microsoft Office apps. references: - https://securityliterate.com/how-malware-abuses-the-zone-identifier-to-circumvent-detection-and-analysis/ - Internal Research author: Nasreddine Bencherchali (Nextron Systems) date: 2023-09-04 modified: 2025-07-04 tags: - attack.stealth - attack.t1070.004 logsource: product: windows category: file_delete detection: selection: TargetFilename|endswith: :Zone.Identifier filter_main_generic: Image: - C:\Program Files\PowerShell\7-preview\pwsh.exe - C:\Program Files\PowerShell\7\pwsh.exe - C:\Windows\explorer.exe - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe - C:\Windows\SysWOW64\explorer.exe - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe filter_optional_browsers_chrome: Image: - C:\Program Files (x86)\Google\Chrome\Application\chrome.exe - C:\Program Files\Google\Chrome\Application\chrome.exe filter_optional_browsers_firefox: Image: - C:\Program Files (x86)\Mozilla Firefox\firefox.exe - C:\Program Files\Mozilla Firefox\firefox.exe filter_optional_browsers_msedge: Image: - C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe - C:\Program Files\Microsoft\Edge\Application\msedge.exe condition: selection and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - Other third party applications not listed. level: medium
Near-miss passage: Sigma rule: Detects a process memory dump via "comsvcs.dll" using rundll32, covering multiple different techniques (ordinal, minidum. Logsource: windows / process_creation. Rule: title: Process Memory Dump Via Comsvcs.DLL id: 646ea171-dded-4578-8a4d-65e9822892e3 related: - id: 09e6d5c0-05b8-4ff8-9eeb-043046ec774c type: obsolete status: test description: Detects a process memory dump via "comsvcs.dll" using rundll32, covering multiple different techniques (ordinal, minidump function, etc.) references: - https://twitter.com/shantanukhande/status/1229348874298388484 - https://twitter.com/pythonresponder/status/1385064506049630211?s=21 - https://twitter.com/Hexacorn/status/1224848930795552769 - https://modexp.wordpress.com/2019/08/30/minidumpwritedump-via-com-services-dll/ - https://twitter.com/SBousseaden/status/1167417096374050817 - https://twitter.com/Wietze/status/1542107456507203586 - https://github.com/Hackndo/lsassy/blob/14d8f8ae596ecf22b449bfe919829173b8a07635/lsassy/dumpmethod/comsvcs.py - https://www.youtube.com/watch?v=52tAmVLg1KM&t=2070s author: Florian Roth (Nextron Systems), Modexp, Nasreddine Bencherchali (Nextron Systems), Swachchhanda Shrawan Poudel (Nextron Systems) date: 2020-02-18 modified: 2025-02-23 tags: - attack.credential-access - attack.stealth - attack.t1036 - attack.t1003.001 - car.2013-05-009 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: \rundll32.exe - OriginalFileName: RUNDLL32.EXE - CommandLine|contains: rundll32 selection_cli_1: CommandLine|contains|all: - comsvcs - full CommandLine|contains: - '#-' - '#+' - '#24' - '24 ' - MiniDump - '#65560' selection_generic: CommandLine|contains|all: - '24' - comsvcs - full CommandLine|contains: - ' #' - ',#' - ', #' - '"#' condition: (selection_img and 1 of selection_cli_*) or selection_generic falsepositives: - Unlikely level: high