MMC

Adversaries may abuse mmc.exe to proxy execution of malicious .msc files. Microsoft Management Console (MMC) is a binary that may be signed by Microsoft and is used in several ways in either its GUI or in a command prompt.¹² MMC can be used to create, open, and save custom consoles that contain administrative tools created by Microsoft, called snap-ins. These snap-ins may be used to manage Windows systems locally or remotely. MMC can also be used to open Microsoft created .msc files to manage system configuration.³ For example, <code>mmc C:\Users\foo\admintools.msc /a</code> will open a custom, saved console msc file in author mode.⁴ Another common example is <code>mmc gpedit.msc</code>, which will open the Group Policy Editor application window. Adversaries may use MMC commands to perform malicious tasks. For example, <code>mmc wbadmin.msc delete catalog -quiet</code> deletes the backup catalog on the system (i.e. Inhibit System Recovery) without prompts to the user (Note: <code>wbadmin.msc</code> may only be present by default on Windows Server operating systems).⁵⁶ Adversaries may also abuse MMC to execute malicious .msc files. For example, adversaries may first create a malicious registry Class Identifier (CLSID) subkey, which uniquely identifies a Component Object Model class object.⁷ Then, adversaries may create custom consoles with the “Link to Web Address” snap-in that is linked to the malicious CLSID subkey.⁸ Once the .msc file is saved, adversaries may invoke the malicious CLSID payload with the following command: <code>mmc.exe -Embedding C:\path\to\test.msc</code>.⁹

1. win_mmc
2. what_is_mmc
3. win_msc_files_overview
4. win_mmc
5. win_wbadmin_delete_catalog
6. phobos_virustotal
7. win_clsid_key
8. mmc_vulns
9. abusing_com_reg

使用该技术的组织

断言

尚无指向该技术的公开断言。

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