ae6bb36316ba20413015d7879e2893a60af275e54dcf8ecc709af58e23f4e79f

Analysis

max time kernel
149s
max time network
152s
platform
windows11-21h2_x64
resource
win11-20260513-en
resource tags

arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
17/05/2026, 00:23

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General

Target
1.dll
Size 227KB
Sample260517-apllvsbs5y
SHA256 ae6bb36316ba20413015d7879e2893a60af275e54dcf8ecc709af58e23f4e79f
MD5 1862c007aebbe275e3d0a77dd6ffac46
SHA1 51a6d3dd34c42963111e02f18c874ab07c7a4f96
SHA512 61ab81257247a5b4ad6518c6bab517d0bdfba740eba02f59ed06024dd1b9144ad95e3eac365a5dc712cd880812ee97a6e65e30b9aa9f95610c1ee33f348c58ec
SSDEEP 6144:QWMAOCuuF8or3ZPKtH8y211YO987N7TNKDV:ucuI8or3VUzOM7TNK
TLSH
T19B347C00F4C1C072D9BF153249389BB65A7DB9604BE559DFABE80D6E4F303C1D631AAA
MD5 SHA1 SHA512 SSDEEP TLSH

Score

5^/10

discovery execution persistence

Malware Config

Signatures

Drops file in System32 directory 25 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\apphelp.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\msvcp_win.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\USER32.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\IMM32.DLL	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\SHELL32.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\rundll32.exe	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\KERNELBASE.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\msvcrt.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\gdi32full.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\ucrtbase.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\ADVAPI32.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\MSCTF.dll	rundll32.exe
File created	C:\Windows\SysWOW64\2.txt	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\ntdll.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\KERNEL32.DLL	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\AcLayers.DLL	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\GDI32.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\SHLWAPI.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\RPCRT4.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\combase.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\shcore.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\win32u.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\imagehlp.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\sechost.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\uxtheme.dll	rundll32.exe

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4264	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3436	rundll32.exe
3436	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4392 wrote to memory of 3436	4392	rundll32.exe	83
PID 3436 wrote to memory of 3776	3436	rundll32.exe	85
PID 3436 wrote to memory of 4264	3436	rundll32.exe	87

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\1.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4392
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\1.dll,#1
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3436
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /query /tn "WindowsUpdateHelper_3436"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3776
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /tn "WindowsUpdateHelper_3436" /tr "\"C:\Windows\SysWOW64\rundll32.exe\"" /sc onlogon /rl highest /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4264