Identifier / Programs / Windows
mpiexec.exe
Execute serial and parallel jobs in Open MPI. tldr-pages
LOLBAS Execute 1 Sigma rule name it 2 ATT&CK techniques 1 documented command
How mpiexec.exe is abused
Execute T1127 Trusted Developer Utilities Proxy Execution
Each abuse is LOLBAS's category and the options and words it uses; the full write-up is on LOLBAS's page for mpiexec.exe.
1 documented command
Execute T1127 Trusted Developer Utilities Proxy Execution User privileges
Executes a command via MPI command-line tool.
mpiexec.exe {CMD}The command the identifier reads trips no Sigma process-creation rule. These commands and their descriptions are from LOLBAS’s entry for mpiexec.exe, by Avihay Eldad, 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 mpiexec.exe. The identifier reads it 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
Everyday use
Execute an Open MPI program
mpirun path/to/executableIdentifyExecute an Open MPI program with n parallel processes
mpirun -n n path/to/executableIdentifyAllow more processes than available physical cores
mpirun -oversubscribe path/to/executableIdentifyNone of the 3 examples the identifier reads matches LOLBAS abuse or trips a Sigma process-creation rule.