Add Code.yml #425
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Add Code.yml #425
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wietze
reviewed
Apr 26, 2025
| Created: 2025-03-20 | ||
| Commands: | ||
| - Command: Code.exe | ||
| Description: Generate Node.JS JavaScript payload and package.json, and save to "%LOCALAPPDATA%\\Programs\\Microsoft VS Code\\\\resources\\app\\" before executing. |
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Generate Node.JS JavaScript payload and package.json
I can't find references to package.json in the blog, how does this work? Or is it the technique described in one of the blog posts you link, https://l--k.uk/2022/01/16/microsoft-teams-and-other-electron-apps-as-lolbins/ ?
| Detection: | ||
| - IOC: "%LOCALAPPDATA%\\Programs\\Microsoft VS Code\\resources\\app directory created" | ||
| - IOC: "%LOCALAPPDATA%\\Programs\\Microsoft VS Code\\Code.exe file created/modified by non-Code installer/updater" | ||
| - Sigma: https://github.com/SigmaHQ/sigma/blob/43277f26fc1c81fc98fc79147b711189e901b757/rules/windows/process_creation/proc_creation_win_susp_electron_exeuction_proxy.yml |
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From the description this Sigma rule appears to be targeting other Electron applications, not including code.exe, and seemingly using a different technique than described here - is that correct?
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VS Code Electron application hollowing with Node.JS JavaScript C2 code and arbitrary Node.JS JavaScript code execution