acc0b579d50c9af5819334af22cd3f1a10275d24528f93b5ef5e7d9503d6c894

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
13-01-2024 16:13

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General

Target

59290803b74b73e1d8013b92f06d8d5d.dll
Size

37KB
MD5

59290803b74b73e1d8013b92f06d8d5d
SHA1

342b292c1316f5b837c45d551b27b75a3773a361
SHA256

acc0b579d50c9af5819334af22cd3f1a10275d24528f93b5ef5e7d9503d6c894
SHA512

81c86bcffe73243e992ad3cc9f7dfe6526fe6ec3dd740457aa1edfd0ea54712ec1c9c55d78385900c9174900c963054272b989407461b4a698e080f6f4989273
SSDEEP

768:RzAVaeJrRK8NuLDTFzxytAleIoK9HRsGBBFy:Ru1r0LDDyt4oKhRJA

Score

7^/10

persistence

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
1568	rundll32.exe
1568	rundll32.exe
436	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\\tuvVNDwv.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

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

Modifies registry class 4 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F224AAA8-3508-45FD-8D60-21799756D161}\InprocServer32\ThreadingModel = "Both"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F224AAA8-3508-45FD-8D60-21799756D161}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F224AAA8-3508-45FD-8D60-21799756D161}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F224AAA8-3508-45FD-8D60-21799756D161}\InprocServer32\ = "C:\\Windows\\SysWow64\\tuvVNDwv.dll"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1568	rundll32.exe
1568	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe
436	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
1568	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1568	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1568	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 3160 wrote to memory of 1568	3160	rundll32.exe	52
PID 3160 wrote to memory of 1568	3160	rundll32.exe	52
PID 3160 wrote to memory of 1568	3160	rundll32.exe	52
PID 1568 wrote to memory of 616	1568	rundll32.exe	5
PID 1568 wrote to memory of 436	1568	rundll32.exe	103
PID 1568 wrote to memory of 436	1568	rundll32.exe	103
PID 1568 wrote to memory of 436	1568	rundll32.exe	103

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:616

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\59290803b74b73e1d8013b92f06d8d5d.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3160
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\59290803b74b73e1d8013b92f06d8d5d.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:1568
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Windows\system32\tuvVNDwv.dll,a
    3⤵
    - Loads dropped DLL
    - Adds Run key to start application
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    PID:436

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\tuvVNDwv.dll

Filesize
37KB

MD5
59290803b74b73e1d8013b92f06d8d5d

SHA1
342b292c1316f5b837c45d551b27b75a3773a361

SHA256
acc0b579d50c9af5819334af22cd3f1a10275d24528f93b5ef5e7d9503d6c894

SHA512
81c86bcffe73243e992ad3cc9f7dfe6526fe6ec3dd740457aa1edfd0ea54712ec1c9c55d78385900c9174900c963054272b989407461b4a698e080f6f4989273

Download Submit
memory/436-17-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/436-18-0x00000000007A0000-0x00000000007A6000-memory.dmp

Filesize
24KB

Download
memory/436-19-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/1568-0-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/1568-1-0x0000000002D80000-0x0000000002D86000-memory.dmp

Filesize
24KB

Download
memory/1568-8-0x0000000002E30000-0x0000000002E40000-memory.dmp

Filesize
64KB

Download
memory/1568-9-0x0000000002E40000-0x0000000002E46000-memory.dmp

Filesize
24KB

Download
memory/1568-10-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/1568-14-0x0000000002D80000-0x0000000002D86000-memory.dmp

Filesize
24KB

Download