ef7f6b1c353b31f386b48557950e5a24d30144a7b8e869772109a55cbf203a3c

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06/03/2025, 14:27

Target

ef7f6b1c353b31f386b48557950e5a24d30144a7b8e869772109a55cbf203a3c.dll
Size

137KB
MD5

2a8a9853db65e81c157e9cae21fba396
SHA1

69b877967f76692462fc8d8d7df6a99bbcddf0ad
SHA256

ef7f6b1c353b31f386b48557950e5a24d30144a7b8e869772109a55cbf203a3c
SHA512

88e19227ad9b9586b65e7a35adabef4631ee339224a7f22277121bfc7532abc6a7001319c3d7791f8f16db1c20c29361d33c5600da8c450a3df4fd32011b41f2
SSDEEP

3072:UR02WMK8RJGInTlhnaBanONVk40rpg4yeF/TyUGSK9FrafcUksPxx6iTUud:R25GgFny61mraf

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 System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\com\comb.dll	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
2468	2312	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 1924 wrote to memory of 2312	1924	rundll32.exe	30
PID 1924 wrote to memory of 2312	1924	rundll32.exe	30
PID 1924 wrote to memory of 2312	1924	rundll32.exe	30
PID 1924 wrote to memory of 2312	1924	rundll32.exe	30
PID 1924 wrote to memory of 2312	1924	rundll32.exe	30
PID 1924 wrote to memory of 2312	1924	rundll32.exe	30
PID 1924 wrote to memory of 2312	1924	rundll32.exe	30
PID 2312 wrote to memory of 2468	2312	rundll32.exe	31
PID 2312 wrote to memory of 2468	2312	rundll32.exe	31
PID 2312 wrote to memory of 2468	2312	rundll32.exe	31
PID 2312 wrote to memory of 2468	2312	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ef7f6b1c353b31f386b48557950e5a24d30144a7b8e869772109a55cbf203a3c.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1924
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\ef7f6b1c353b31f386b48557950e5a24d30144a7b8e869772109a55cbf203a3c.dll,#1
  2⤵
  - Boot or Logon Autostart Execution: Port Monitors
  - Sets service image path in registry
  - Drops file in System32 directory
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2312
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2312 -s 228
    3⤵
    - Program crash
    PID:2468

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe shell32.dll,SHCreateLocalServerRunDll {995C996E-D918-4a8c-A302-45719A6F4EA7} -Embedding
1⤵
PID:2040