21ca1f3677bd9068b011552a5d03035db6f3b9af136a178a80b278c6befdc767

Analysis

max time kernel
140s
max time network
119s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
12-09-2024 20:15

Target

21ca1f3677bd9068b011552a5d03035db6f3b9af136a178a80b278c6befdc767.dll
Size

137KB
MD5

a9b21d3e1876cbe28141abc595fbf59f
SHA1

c3c745590acf994df4a1df1ef23ee335be8618b7
SHA256

21ca1f3677bd9068b011552a5d03035db6f3b9af136a178a80b278c6befdc767
SHA512

1336dc632bc79759d51af8ca56782a00dfd16975c605901b213bd89245c86d9e4df27687a06d87bff0bcdf7e0404b4169bd1b05b91da8b27972b616333c16a52
SSDEEP

3072:zR02WMK8RJGInTlhnaBanONVk40rpg4yeF/TyUGSK9FrafcUksPxx6iTUuB:e25GgFny61mraT

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
1308	2072	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 1152 wrote to memory of 2072	1152	rundll32.exe	30
PID 1152 wrote to memory of 2072	1152	rundll32.exe	30
PID 1152 wrote to memory of 2072	1152	rundll32.exe	30
PID 1152 wrote to memory of 2072	1152	rundll32.exe	30
PID 1152 wrote to memory of 2072	1152	rundll32.exe	30
PID 1152 wrote to memory of 2072	1152	rundll32.exe	30
PID 1152 wrote to memory of 2072	1152	rundll32.exe	30
PID 2072 wrote to memory of 1308	2072	rundll32.exe	31
PID 2072 wrote to memory of 1308	2072	rundll32.exe	31
PID 2072 wrote to memory of 1308	2072	rundll32.exe	31
PID 2072 wrote to memory of 1308	2072	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\21ca1f3677bd9068b011552a5d03035db6f3b9af136a178a80b278c6befdc767.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1152
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\21ca1f3677bd9068b011552a5d03035db6f3b9af136a178a80b278c6befdc767.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:2072
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2072 -s 228
    3⤵
    - Program crash
    PID:1308

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe shell32.dll,SHCreateLocalServerRunDll {995C996E-D918-4a8c-A302-45719A6F4EA7} -Embedding
1⤵
PID:2368