System Binary Proxy Execution: Msiexec

Defense Evasion [Mitre]

Adversaries may abuse msiexec.exe to proxy execution of malicious payloads. Msiexec.exe is the command-line utility for the Windows Installer and is thus commonly associated with executing installation packages (.msi). The Msiexec.exe binary may also be digitally signed by Microsoft.

Adversaries may abuse msiexec.exe to launch local or network accessible MSI files. Msiexec.exe can also execute DLLs. Since it may …

System Binary Proxy Execution: Odbcconf

Defense Evasion [Mitre]

Adversaries may abuse odbcconf.exe to proxy execution of malicious payloads. Odbcconf.exe is a Windows utility that allows you to configure Open Database Connectivity (ODBC) drivers and data source names. The Odbcconf.exe binary may be digitally signed by Microsoft.

Adversaries may abuse odbcconf.exe to bypass application control solutions that do not account for its potential abuse. Similar to Regsvr32, odbcconf.exe …

System Binary Proxy Execution: Regsvcs/Regasm

Defense Evasion [Mitre]

Adversaries may abuse Regsvcs and Regasm to proxy execution of code through a trusted Windows utility. Regsvcs and Regasm are Windows command-line utilities that are used to register .NET Component Object Model (COM) assemblies. Both are binaries that may be digitally signed by Microsoft.

Both utilities may be used to bypass application control through use of attributes within the …

System Binary Proxy Execution: Regsvr32

Defense Evasion [Mitre]

Adversaries may abuse Regsvr32.exe to proxy execution of malicious code. Regsvr32.exe is a command-line program used to register and unregister object linking and embedding controls, including dynamic link libraries (DLLs), on Windows systems. The Regsvr32.exe binary may also be signed by Microsoft.

Malicious usage of Regsvr32.exe may avoid triggering security tools that may not monitor execution of, and modules …

System Binary Proxy Execution: Rundll32

Defense Evasion [Mitre]

Adversaries may abuse rundll32.exe to proxy execution of malicious code. Using rundll32.exe, vice executing directly (i.e. Shared Modules), may avoid triggering security tools that may not monitor execution of the rundll32.exe process because of allowlists or false positives from normal operations. Rundll32.exe is commonly associated with executing DLL payloads (ex: rundll32.exe {DLLname, DLLfunction}).

Rundll32.exe can also be used to …

System Binary Proxy Execution: Verclsid

Defense Evasion [Mitre]

Adversaries may abuse verclsid.exe to proxy execution of malicious code. Verclsid.exe is known as the Extension CLSID Verification Host and is responsible for verifying each shell extension before they are used by Windows Explorer or the Windows Shell.

Adversaries may abuse verclsid.exe to execute malicious payloads. This may be achieved by running verclsid.exe /S /C {CLSID}, where the file …

System Binary Proxy Execution: Mavinject

Defense Evasion [Mitre]

Adversaries may abuse mavinject.exe to proxy execution of malicious code. Mavinject.exe is the Microsoft Application Virtualization Injector, a Windows utility that can inject code into external processes as part of Microsoft Application Virtualization (App-V).

Adversaries may abuse mavinject.exe to inject malicious DLLs into running processes (i.e. Dynamic-link Library Injection), allowing for arbitrary code execution (ex. C:\Windows\system32\mavinject.exe PID /INJECTRUNNING PATH_DLL). …

System Binary Proxy Execution: MMC

Defense Evasion [Mitre]

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. MMC can be used to create, open, and save custom consoles that contain administrative tools created by Microsoft, called snap-ins. These …

System Script Proxy Execution: PubPrn

Defense Evasion [Mitre]

Adversaries may use PubPrn to proxy execution of malicious remote files. PubPrn.vbs is a Visual Basic script that publishes a printer to Active Directory Domain Services. The script may be signed by Microsoft and is commonly executed through the Windows Command Shell via Cscript.exe. For example, the following code publishes a printer within the specified domain: cscript pubprn Printer1 LDAP://CN=Container1,DC=Domain1,DC=Com.

Trusted Developer Utilities Proxy Execution: MSBuild

Defense Evasion [Mitre]

Adversaries may use MSBuild to proxy execution of code through a trusted Windows utility. MSBuild.exe (Microsoft Build Engine) is a software build platform used by Visual Studio. It handles XML formatted project files that define requirements for loading and building various platforms and configurations.

Adversaries can abuse MSBuild to proxy execution of malicious code. The inline task capability of …

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System Binary Proxy Execution: Msiexec

Defense Evasion [Mitre]

System Binary Proxy Execution: Odbcconf

Defense Evasion [Mitre]

System Binary Proxy Execution: Regsvcs/Regasm

Defense Evasion [Mitre]

System Binary Proxy Execution: Regsvr32

Defense Evasion [Mitre]

System Binary Proxy Execution: Rundll32

Defense Evasion [Mitre]

System Binary Proxy Execution: Verclsid

Defense Evasion [Mitre]

System Binary Proxy Execution: Mavinject

Defense Evasion [Mitre]

System Binary Proxy Execution: MMC

Defense Evasion [Mitre]

System Script Proxy Execution: PubPrn

Defense Evasion [Mitre]

Trusted Developer Utilities Proxy Execution: MSBuild

Defense Evasion [Mitre]