b8e538fccec8c22cefb09848bc8c10adfb3a7fb8159004c84a004d413ae6968c

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, 09:55

Target

b8e538fccec8c22cefb09848bc8c10adfb3a7fb8159004c84a004d413ae6968c.dll
Size

137KB
MD5

a2c4ba9d0abcd8ae7679ad1129b7c38f
SHA1

67137b6c3b7a6e3d33a2fa64bc4fbf6f1e32a1ac
SHA256

b8e538fccec8c22cefb09848bc8c10adfb3a7fb8159004c84a004d413ae6968c
SHA512

ec1e659632a1b786d2a3cae9436a1e2625f34b9cc19986699bf9b036cb8556f324ebb5e9f54daee547e15273011870384fe07073e1966455783979f2832308fb
SSDEEP

3072:SR02WMK8RJGInTlhnaBanONVk40rpg4yeF/TyUGSK9FrafcUksPxx6iTUuT:325GgFny61mrax

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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1944	2916	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 2200 wrote to memory of 2916	2200	rundll32.exe	30
PID 2200 wrote to memory of 2916	2200	rundll32.exe	30
PID 2200 wrote to memory of 2916	2200	rundll32.exe	30
PID 2200 wrote to memory of 2916	2200	rundll32.exe	30
PID 2200 wrote to memory of 2916	2200	rundll32.exe	30
PID 2200 wrote to memory of 2916	2200	rundll32.exe	30
PID 2200 wrote to memory of 2916	2200	rundll32.exe	30
PID 2916 wrote to memory of 1944	2916	rundll32.exe	31
PID 2916 wrote to memory of 1944	2916	rundll32.exe	31
PID 2916 wrote to memory of 1944	2916	rundll32.exe	31
PID 2916 wrote to memory of 1944	2916	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b8e538fccec8c22cefb09848bc8c10adfb3a7fb8159004c84a004d413ae6968c.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2200
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\b8e538fccec8c22cefb09848bc8c10adfb3a7fb8159004c84a004d413ae6968c.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:2916
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2916 -s 228
    3⤵
    - Program crash
    PID:1944

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe shell32.dll,SHCreateLocalServerRunDll {995C996E-D918-4a8c-A302-45719A6F4EA7} -Embedding
1⤵
PID:1960