fabbd6a35dc9a7bc72445b5835b4f1e7791649758b7dfd3a3d7d755678e67de6

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
03/02/2024, 03:19

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General

Target

8b4311cecfd50619608949d8c5ee757f.dll
Size

33KB
MD5

8b4311cecfd50619608949d8c5ee757f
SHA1

12d54c910eeb2645fc8497fe51fcfacf457a3daa
SHA256

fabbd6a35dc9a7bc72445b5835b4f1e7791649758b7dfd3a3d7d755678e67de6
SHA512

872311c7381e3efd29c64932fdb5d2aae378dc8b0b1fbd2faf4ed4ff11086f740536d6811e2e46029e440465735e4b0c4a5ac2c9c57bbffb31df4bf1dc86a6f4
SSDEEP

768:OzrmoXyoWtKMOTe/nRrxYKGrvHfMT5WI7LgVsuK8wa:Oza8y1tCTunRrxYpj/0nfuT

Score

7^/10

persistence

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
3104	rundll32.exe
3104	rundll32.exe
5004	rundll32.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSServer = "rundll32.exe C:\\Windows\\system32\\cbXOGXPJ.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\cbXOGXPJ.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\cbXOGXPJ.dll	rundll32.exe

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{74633F37-CF9D-4EFD-B548-D847566866FC}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{74633F37-CF9D-4EFD-B548-D847566866FC}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{74633F37-CF9D-4EFD-B548-D847566866FC}\InprocServer32\ = "C:\\Windows\\SysWow64\\cbXOGXPJ.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{74633F37-CF9D-4EFD-B548-D847566866FC}\InprocServer32\ThreadingModel = "Both"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3104	rundll32.exe
3104	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe
5004	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
3104	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3104	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3104	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2184 wrote to memory of 3104	2184	rundll32.exe	85
PID 2184 wrote to memory of 3104	2184	rundll32.exe	85
PID 2184 wrote to memory of 3104	2184	rundll32.exe	85
PID 3104 wrote to memory of 612	3104	rundll32.exe	82
PID 3104 wrote to memory of 5004	3104	rundll32.exe	98
PID 3104 wrote to memory of 5004	3104	rundll32.exe	98
PID 3104 wrote to memory of 5004	3104	rundll32.exe	98

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8b4311cecfd50619608949d8c5ee757f.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2184
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\8b4311cecfd50619608949d8c5ee757f.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: RenamesItself
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3104
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Windows\system32\cbXOGXPJ.dll,a
    3⤵
    - Loads dropped DLL
    - Adds Run key to start application
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    PID:5004

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:612

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\cbXOGXPJ.dll

Filesize
33KB

MD5
8b4311cecfd50619608949d8c5ee757f

SHA1
12d54c910eeb2645fc8497fe51fcfacf457a3daa

SHA256
fabbd6a35dc9a7bc72445b5835b4f1e7791649758b7dfd3a3d7d755678e67de6

SHA512
872311c7381e3efd29c64932fdb5d2aae378dc8b0b1fbd2faf4ed4ff11086f740536d6811e2e46029e440465735e4b0c4a5ac2c9c57bbffb31df4bf1dc86a6f4

Download Submit
memory/3104-0-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/3104-1-0x0000000000D10000-0x0000000000D15000-memory.dmp

Filesize
20KB

Download
memory/3104-8-0x0000000000DE0000-0x0000000000DF0000-memory.dmp

Filesize
64KB

Download
memory/3104-9-0x0000000000DF0000-0x0000000000DF5000-memory.dmp

Filesize
20KB

Download
memory/3104-10-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/3104-14-0x0000000000D10000-0x0000000000D15000-memory.dmp

Filesize
20KB

Download
memory/5004-17-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/5004-18-0x0000000000C50000-0x0000000000C55000-memory.dmp

Filesize
20KB

Download
memory/5004-19-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download