Query: detection rule: Detects process access requests to LSASS process with potentially suspicious access flags
Matching passage: Sigma rule: Detects process access requests to LSASS process with potentially suspicious access flags. Logsource: windows / process_access. Rule: title: Potentially Suspicious GrantedAccess Flags On LSASS id: a18dd26b-6450-46de-8c91-9659150cf088 related: - id: 32d0d3e2-e58d-4d41-926b-18b520b2b32d type: similar status: test description: Detects process access requests to LSASS process with potentially suspicious access flags references: - https://learn.microsoft.com/en-us/windows/win32/procthread/process-security-and-access-rights - https://onedrive.live.com/view.aspx?resid=D026B4699190F1E6!2843&ithint=file%2cpptx&app=PowerPoint&authkey=!AMvCRTKB_V1J5ow - https://web.archive.org/web/20230208123920/https://cyberwardog.blogspot.com/2017/03/chronicles-of-threat-hunter-hunting-for_22.html - https://www.slideshare.net/heirhabarov/hunting-for-credentials-dumping-in-windows-environment - https://web.archive.org/web/20230420013146/http://security-research.dyndns.org/pub/slides/FIRST2017/FIRST-2017_Tom-Ueltschi_Sysmon_FINAL_notes.pdf author: Florian Roth, Roberto Rodriguez, Dimitrios Slamaris, Mark Russinovich, Thomas Patzke, Teymur Kheirkhabarov, Sherif Eldeeb, James Dickenson, Aleksey Potapov, oscd.community date: 2021-11-22 modified: 2026-06-29 tags: - attack.credential-access - attack.t1003.001 - attack.s0002 logsource: category: process_access product: windows detection: selection_target: TargetImage|endswith: \lsass.exe selection_access: - GrantedAccess|endswith: - '30' - '50' - '70' - '90' - B0 - D0 - F0 - '18' - '38' - '58' - '78' - '98' - B8 - D8 - F8 - 1A - 3A - 5A - 7A - 9A - BA - DA - FA - '0x14C2' - GrantedAccess|startswith: - '0x100000' - '0x1418' - '0x1438' - '0x143a' - '0x1f0fff' - '0x1f1fff' - '0x1f2fff' - '0x1f3fff' - '0x40' filter_main_generic: SourceImage|contains: - :\Program Files (x86)\ - :\Program Files\ - :\Windows\System32\ - :\Windows\SysWOW64\ filter_optional_malwarebytes: SourceImage|endswith: :\ProgramData\MALWAREBYTES\MBAMSERVICE\ctlrupdate\mbupdatr.exe filter_optional_vscode: SourceImage|endswith: \AppData\Local\Programs\Microsoft VS Code\Code.exe filter_main_windefend_1: SourceImage|contains: :\ProgramData\Microsoft\Windows Defender\ SourceImage|endswith: \MsMpEng.exe filter_main_windefend_2: CallTrace|contains|all: - '|?:\ProgramData\Microsoft\Windows Defender\Definition Updates\{' - '}\mpengine.dll+' GrantedAccess: '0x1418' filter_main_windefend_3: CallTrace|contains: - '|c:\program files\windows defender\mprtp.dll' - '|c:\program files\windows defender\MpClient.dll' filter_optional_vmwaretools: SourceImage|contains: :\ProgramData\VMware\VMware Tools\ SourceImage|endswith: \
Near-miss passage: Sigma rule: Detects a suspicious printer driver installation with an empty Manufacturer value. Logsource: windows / registry_set. Rule: title: Suspicious Printer Driver Empty Manufacturer id: e0813366-0407-449a-9869-a2db1119dc41 status: test description: Detects a suspicious printer driver installation with an empty Manufacturer value references: - https://twitter.com/SBousseaden/status/1410545674773467140 author: Florian Roth (Nextron Systems) date: 2020-07-01 modified: 2023-08-17 tags: - attack.persistence - attack.privilege-escalation - attack.execution - attack.stealth - attack.t1574 - cve.2021-1675 logsource: category: registry_set product: windows detection: selection: TargetObject|contains|all: - \Control\Print\Environments\Windows x64\Drivers - \Manufacturer Details: (Empty) filter_cutepdf: TargetObject|contains: \CutePDF Writer v4.0\ filter_vnc: TargetObject|contains: - \VNC Printer (PS)\ - \VNC Printer (UD)\ filter_pdf24: TargetObject|contains: \Version-3\PDF24\ condition: selection and not 1 of filter_* falsepositives: - Alerts on legitimate printer drivers that do not set any more details in the Manufacturer value level: high