Identifier / Programs / Windows
pcalua.exe
Program Compatibility Assistant file version info (xCyclopedia)
LOLBAS Execute 3 Sigma rules name it 2 ATT&CK techniques 3 documented commands 7 known copies with hashes
How pcalua.exe is abused
Execute T1202 Indirect Command Execution
-aEach abuse is LOLBAS's category and the options and words it uses; the full write-up is on LOLBAS's page for pcalua.exe.
3 documented commands
Execute T1202 Indirect Command Execution User privileges
Open the target .EXE using the Program Compatibility Assistant.
pcalua.exe -a {PATH:.exe}IdentifyTrips 1 Sigma rule: mediumUse of Pcalua For Execution by Nasreddine Bencherchali (Nextron Systems), E.M. Anhaus (originally from Atomic Blue Detections, Endgame), oscd.community
Execute T1202 Indirect Command Execution User privileges
Open the target .DLL file with the Program Compatibilty Assistant.
pcalua.exe -a {PATH_SMB:.dll}IdentifyTrips 1 Sigma rule: mediumUse of Pcalua For Execution by Nasreddine Bencherchali (Nextron Systems), E.M. Anhaus (originally from Atomic Blue Detections, Endgame), oscd.community
Execute T1202 Indirect Command Execution User privileges
Open the target .CPL file with the Program Compatibility Assistant.
pcalua.exe -a {PATH_ABSOLUTE:.cpl} -c JavaIdentifyTrips 1 Sigma rule: mediumUse of Pcalua For Execution by Nasreddine Bencherchali (Nextron Systems), E.M. Anhaus (originally from Atomic Blue Detections, Endgame), oscd.community
All 3 commands the identifier reads trip a Sigma process-creation rule. These commands and their descriptions are from LOLBAS’s entry for pcalua.exe, by Oddvar Moe, at commit 2056cb766250 of 2026-09-26, under the GPL-3.0 and LOLBAS’s notice, with no warranty. Changed: Markdown is shown formatted. The source is in lolbas-gtfobins-commands.json.gz, and the full entry is on LOLBAS’s page for pcalua.exe. The identifier reads each with LOLBAS’s placeholders filled in: a URL as https://example.com/file, a share as \\192.0.2.10\share\file, a path as C:\Data\file and a command as calc.exe.
What detects it
Is it the real pcalua.exe?
C:\Windows\system32\7 known copies
10.0.22000.1 (WinBuild.160101.0800) · C:\WINDOWS\system32\pcalua.exe · signed by Microsoft Windows
054a2731200e7414949956243d91a9aab024a75621adc32aff389b7426fe56db10.0.19041.1 (WinBuild.160101.0800) · C:\Windows\system32\pcalua.exe · signed by Microsoft Windows
1d528a686a583162794349114f945a8bd2b17321f6fa62288cd1ce3ec48d244710.0.19041.1 (WinBuild.160101.0800) · C:\Windows\system32\pcalua.exe · signed by Microsoft Windows
6ffc6399f7aa42ee25e9593e3a10ae83ad484cf563c08ce7a33e63008e9d351110.0.19041.1 (WinBuild.160101.0800) · C:\Windows\system32\pcalua.exe · signed by Microsoft Windows
e7049e16dba743600f33a8dc5255507c7e212b119569df5354605fe14a75e61b10.0.18362.1 (WinBuild.160101.0800) · C:\WINDOWS\system32\pcalua.exe · signed by Microsoft Windows
de0d9df989b49d5a38758196690236c732a8e86deb9f9487337289e10899fdc010.0.17763.1 (WinBuild.160101.0800) · C:\Windows\system32\pcalua.exe · signed by Microsoft Windows
36ef04735adfff417ae761bf6595badb54a4cceb3550aba7cfd4f7234c90ee7d10.0.14393.0 (rs1_release.160715-1616) · C:\Windows\system32\pcalua.exe · signed by Microsoft Windows
5a18a7cdac642694f298b02e08d2b3446a5ce156eac0efc752a85b072bbbd994From the file’s version info and the copies recorded by xCyclopedia (MIT). A copy in another folder, signed by someone else or with another hash is not necessarily malicious, but it is worth a closer look. In Ceplin, "<sha256>".whatis() says which known copy a hash is.