Identifier / Programs / Windows
advpack.dll
ADVPACK file version info (xCyclopedia)
LOLBAS AWL Bypass, Execute 1 ATT&CK technique 5 documented commands 2 known copies with hashes
How advpack.dll is abused
AWL Bypass T1218.011 System Binary Proxy Execution: Rundll32
Run by rundll32.exe: advpack.dll,launchinfsection
Execute T1218.011 System Binary Proxy Execution: Rundll32
Run by rundll32.exe: advpack.dll,registerocx
Execute T1218.011 System Binary Proxy Execution: Rundll32
Run by rundll32.exe: registerocx
Each abuse is LOLBAS's category and the options and words it uses; the full write-up is on LOLBAS's page for advpack.dll.
5 documented commands
AWL Bypass T1218.011 System Binary Proxy Execution: Rundll32 User privileges
Execute the specified (local or remote) .wsh/.sct script with scrobj.dll in the .inf file by calling an information file directive (section name specified).
rundll32.exe advpack.dll,LaunchINFSection {PATH:.inf},DefaultInstall_SingleUser,1,Trips 1 Sigma rule: mediumPotentially Suspicious Rundll32 Activity by juju4, Jonhnathan Ribeiro, oscd.community, Nasreddine Bencherchali (Nextron Systems)
AWL Bypass T1218.011 System Binary Proxy Execution: Rundll32 User privileges
Execute the specified (local or remote) .wsh/.sct script with scrobj.dll in the .inf file by calling an information file directive (DefaultInstall section implied).
rundll32.exe advpack.dll,LaunchINFSection {PATH:.inf},,1,Trips 1 Sigma rule: mediumPotentially Suspicious Rundll32 Activity by juju4, Jonhnathan Ribeiro, oscd.community, Nasreddine Bencherchali (Nextron Systems)
Execute T1218.011 System Binary Proxy Execution: Rundll32 User privileges
Launch a DLL payload by calling the RegisterOCX function.
rundll32.exe advpack.dll,RegisterOCX {PATH:.dll}Trips 1 Sigma rule: mediumPotentially Suspicious Rundll32 Activity by juju4, Jonhnathan Ribeiro, oscd.community, Nasreddine Bencherchali (Nextron Systems)
Execute T1218.011 System Binary Proxy Execution: Rundll32 User privileges
Launch an executable by calling the RegisterOCX function.
rundll32.exe advpack.dll,RegisterOCX {PATH:.exe}Trips 1 Sigma rule: mediumPotentially Suspicious Rundll32 Activity by juju4, Jonhnathan Ribeiro, oscd.community, Nasreddine Bencherchali (Nextron Systems)
Execute T1218.011 System Binary Proxy Execution: Rundll32 User privileges
Launch command line by calling the RegisterOCX function.
rundll32 advpack.dll, RegisterOCX {CMD}Trips 1 Sigma rule: mediumPotentially Suspicious Rundll32 Activity by juju4, Jonhnathan Ribeiro, oscd.community, Nasreddine Bencherchali (Nextron Systems)
All 5 commands the identifier reads trip a Sigma process-creation rule. These commands and their descriptions are from LOLBAS’s entry for advpack.dll, by LOLBAS Team, 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 advpack.dll. 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 advpack.dll?
C:\Windows\system32\C:\Windows\SysWOW64\2 known copies
11.00.19041.1 (WinBuild.160101.0800) · C:\Windows\system32\advpack.dll · signed by Microsoft Windows
65de1e0484a345413a66cbf16158c8634f6dba6f0ae15109c7d8ebe131701f8911.00.19041.1 (WinBuild.160101.0800) · C:\Windows\SysWOW64\advpack.dll · signed by Microsoft Windows
a8bd79d517ce20c88626ef5df4e216c46a4a7770223a7f6f11d926afaaee606fFrom 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.