Query: Sigma rule for Detect scenarios where a potentially unauthorized application or user is modifying the system time.
Matching passage: Sigma rule: Detect scenarios where a potentially unauthorized application or user is modifying the system time.. Logsource: windows / security. Rule: title: Unauthorized System Time Modification id: faa031b5-21ed-4e02-8881-2591f98d82ed status: test description: Detect scenarios where a potentially unauthorized application or user is modifying the system time. references: - Private Cuckoo Sandbox (from many years ago, no longer have hash, NDA as well) - Live environment caused by malware - https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-10/security/threat-protection/auditing/event-4616 author: '@neu5ron' date: 2019-02-05 modified: 2025-12-03 tags: - attack.stealth - attack.t1070.006 logsource: product: windows service: security definition: 'Requirements: Audit Policy : System > Audit Security State Change, Group Policy : Computer Configuration\Windows Settings\Security Settings\Advanced Audit Policy Configuration\Audit Policies\System\Audit Security State Change' detection: selection: EventID: 4616 filter_main_svchost: ProcessName: C:\Windows\System32\svchost.exe SubjectUserSid: S-1-5-19 filter_optional_vmtools: ProcessName: - C:\Program Files\VMware\VMware Tools\vmtoolsd.exe - C:\Program Files (x86)\VMware\VMware Tools\vmtoolsd.exe - C:\Windows\System32\VBoxService.exe - C:\Windows\System32\oobe\msoobe.exe condition: selection and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - HyperV or other virtualization technologies with binary not listed in filter portion of detection level: low
Near-miss passage: Sigma rule: Detects potentially suspicious CommandLine of electron apps (teams, discord, slack, etc.). This could be a sign of abuse. Logsource: windows / process_creation. Rule: title: Potentially Suspicious Electron Application CommandLine id: 378a05d8-963c-46c9-bcce-13c7657eac99 related: - id: f26eb764-fd89-464b-85e2-dc4a8e6e77b8 type: similar status: test description: Detects potentially suspicious CommandLine of electron apps (teams, discord, slack, etc.). This could be a sign of abuse to proxy execution through a signed binary. references: - https://positive.security/blog/ms-officecmd-rce - https://lolbas-project.github.io/lolbas/Binaries/Teams/ - https://lolbas-project.github.io/lolbas/Binaries/Msedge/ - https://lolbas-project.github.io/lolbas/Binaries/msedgewebview2/ - https://medium.com/@MalFuzzer/one-electron-to-rule-them-all-dc2e9b263daf - https://chromium.googlesource.com/chromium/chromium/+/master/content/public/common/content_switches.cc author: frack113, Nasreddine Bencherchali (Nextron Systems) date: 2023-09-05 modified: 2023-11-09 tags: - attack.execution logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: - \chrome.exe - \code.exe - \discord.exe - \GitHubDesktop.exe - \keybase.exe - \msedge_proxy.exe - \msedge.exe - \msedgewebview2.exe - \msteams.exe - \slack.exe - \Teams.exe - OriginalFileName: - chrome.exe - code.exe - discord.exe - GitHubDesktop.exe - keybase.exe - msedge_proxy.exe - msedge.exe - msedgewebview2.exe - msteams.exe - slack.exe - Teams.exe selection_cli: CommandLine|contains: - --browser-subprocess-path - --gpu-launcher - --renderer-cmd-prefix - --utility-cmd-prefix condition: all of selection_* falsepositives: - Legitimate usage for debugging purposes level: medium