6c667639fccc9d38880f404e083da944270247266b0da49c99a86dda01849eb9

Analysis

max time kernel
151s
max time network
176s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
31/12/2023, 14:12

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General

Target

395a8d049132f9d3272b7ad7d921682e.dll
Size

31KB
MD5

395a8d049132f9d3272b7ad7d921682e
SHA1

a9a5d0ee3fab13df8e2d4ab62162faf93a1e7aec
SHA256

6c667639fccc9d38880f404e083da944270247266b0da49c99a86dda01849eb9
SHA512

6daad53ccc152656c1c9a4f2c3918a58794795b386c4e2ca240adc9e9c55ef57f81dc5ea1bfe8d4e5303618453bd365fb9b9e2ea9866c05f13b53dc9385cbc15
SSDEEP

384:blLU44nwgycRejM9kM/P3IdulSaxJYRQve59HC5npRJRfGe7uSUvqPvDaC:FU44nV5WK/vtise5YpxfN7LUvqjn

Score

7^/10

persistence

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
4524	rundll32.exe
4524	rundll32.exe
660	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\\wvUnOHwT.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

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

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{2A65BE74-EC8D-401E-93DF-5BDA3DC05505}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{2A65BE74-EC8D-401E-93DF-5BDA3DC05505}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{2A65BE74-EC8D-401E-93DF-5BDA3DC05505}\InprocServer32\ = "C:\\Windows\\SysWow64\\wvUnOHwT.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{2A65BE74-EC8D-401E-93DF-5BDA3DC05505}\InprocServer32\ThreadingModel = "Both"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4524	rundll32.exe
4524	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe
660	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
4524	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4524	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4524	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 4956 wrote to memory of 4524	4956	rundll32.exe	88
PID 4956 wrote to memory of 4524	4956	rundll32.exe	88
PID 4956 wrote to memory of 4524	4956	rundll32.exe	88
PID 4524 wrote to memory of 628	4524	rundll32.exe	3
PID 4524 wrote to memory of 660	4524	rundll32.exe	100
PID 4524 wrote to memory of 660	4524	rundll32.exe	100
PID 4524 wrote to memory of 660	4524	rundll32.exe	100

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:628

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\395a8d049132f9d3272b7ad7d921682e.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4956
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\395a8d049132f9d3272b7ad7d921682e.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:4524
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Windows\system32\wvUnOHwT.dll,a
    3⤵
    - Loads dropped DLL
    - Adds Run key to start application
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    PID:660

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\wvUnOHwT.dll

Filesize
31KB

MD5
395a8d049132f9d3272b7ad7d921682e

SHA1
a9a5d0ee3fab13df8e2d4ab62162faf93a1e7aec

SHA256
6c667639fccc9d38880f404e083da944270247266b0da49c99a86dda01849eb9

SHA512
6daad53ccc152656c1c9a4f2c3918a58794795b386c4e2ca240adc9e9c55ef57f81dc5ea1bfe8d4e5303618453bd365fb9b9e2ea9866c05f13b53dc9385cbc15

Download Submit
memory/660-19-0x0000000001460000-0x0000000001465000-memory.dmp

Filesize
20KB

Download
memory/660-18-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/660-20-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/4524-0-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/4524-1-0x00000000005C0000-0x00000000005C5000-memory.dmp

Filesize
20KB

Download
memory/4524-8-0x00000000005E0000-0x00000000005F0000-memory.dmp

Filesize
64KB

Download
memory/4524-9-0x00000000005F0000-0x00000000005F5000-memory.dmp

Filesize
20KB

Download
memory/4524-10-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/4524-14-0x00000000005C0000-0x00000000005C5000-memory.dmp

Filesize
20KB

Download