Sigma rule: Potentially Suspicious Electron Application CommandLine

Rule

Title

Potentially Suspicious Electron Application CommandLine

Status

test

Level

medium

Author

frack113, Nasreddine Bencherchali (Nextron Systems)

Date

2023-09-05

Modified

2023-11-09

File

rules/windows/process_creation/proc_creation_win_susp_electron_execution_proxy.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

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.

Log source

product

windows

category

process_creation

Detection

selection_img:
    - Image|endswith:
          # Add more electron based app to the list
          - '\chrome.exe'
          - '\code.exe'
          - '\discord.exe'
          - '\GitHubDesktop.exe'
          - '\keybase.exe'
          - '\msedge_proxy.exe'
          - '\msedge.exe'
          - '\msedgewebview2.exe'
          - '\msteams.exe'
          - '\slack.exe'
          - '\Teams.exe'
    - OriginalFileName:
          # Add more electron based app to the list
          - '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_*

False positives (as the rule lists them)

• Legitimate usage for debugging purposes

Tags

• attack.execution

Related rules

• f26eb764-fd89-464b-85e2-dc4a8e6e77b8 (similar)

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

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_susp_electron_execution_proxy.yml