f75bc447d88453a635e8f27b392f9834a10122a64e3952e83b1371ccab43e5ba

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20250207-en
resource tags

arch:x64arch:x86image:win7-20250207-enlocale:en-usos:windows7-x64system
submitted
09/03/2025, 00:06

Target

f75bc447d88453a635e8f27b392f9834a10122a64e3952e83b1371ccab43e5ba.dll
Size

137KB
MD5

3aac2d86eeb341c1dc05fbcd26e31556
SHA1

e67c94c7beeaf99f1aa409b201e980eda22db891
SHA256

f75bc447d88453a635e8f27b392f9834a10122a64e3952e83b1371ccab43e5ba
SHA512

5edf980a2ec1d8b649c5bbbb7716df964fb4da89c97de0e7f8300b5e6ee40da873d06a0a738bc84f2d84767c7331e8f0ee3aa1a9882844002154f764534bf4b6
SSDEEP

3072:AR02WMK8RJGInTlhnaBanONVk40rpg4yeF/TyUGSK9FrafcUksPxx6iTUun:F25GgFny61mraB

Score

8^/10

Boot or Logon Autostart Execution: Port Monitors 1 TTPs 2 IoCs

Adversaries may use port monitors to run an adversary supplied DLL during system boot for persistence or privilege escalation.

Port Monitors

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\Print\Monitors\SCSI Port Monitor	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\Print\Monitors\SCSI Port Monitor\Driver = "scsimon.dll"	rundll32.exe

Sets service image path in registry 2 TTPs 1 IoCs

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Spooler\ImagePath = "Spoolsv.exe"	rundll32.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\AppPatch\ComBack.Dll	rundll32.exe
File created	C:\Windows\AppPatch\ComBack.Dll	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2756	2396	WerFault.exe	30

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

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

System Language Discovery

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

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2640 wrote to memory of 2396	2640	rundll32.exe	30
PID 2640 wrote to memory of 2396	2640	rundll32.exe	30
PID 2640 wrote to memory of 2396	2640	rundll32.exe	30
PID 2640 wrote to memory of 2396	2640	rundll32.exe	30
PID 2640 wrote to memory of 2396	2640	rundll32.exe	30
PID 2640 wrote to memory of 2396	2640	rundll32.exe	30
PID 2640 wrote to memory of 2396	2640	rundll32.exe	30
PID 2396 wrote to memory of 2756	2396	rundll32.exe	31
PID 2396 wrote to memory of 2756	2396	rundll32.exe	31
PID 2396 wrote to memory of 2756	2396	rundll32.exe	31
PID 2396 wrote to memory of 2756	2396	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f75bc447d88453a635e8f27b392f9834a10122a64e3952e83b1371ccab43e5ba.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2640
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f75bc447d88453a635e8f27b392f9834a10122a64e3952e83b1371ccab43e5ba.dll,#1
  2⤵
  - Boot or Logon Autostart Execution: Port Monitors
  - Sets service image path in registry
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2396
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2396 -s 228
    3⤵
    - Program crash
    PID:2756