1646c032c7726fb2da7301eda1caeaef06645aec7b65be34e4cd4ae8dd96b36e

Analysis

max time kernel
150s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26/03/2024, 18:15

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General

Target

dfcb5869a53b77b0508febddfac186ea.dll
Size

32KB
MD5

dfcb5869a53b77b0508febddfac186ea
SHA1

e823deea9bec03a8171fb03c00224217aff78a06
SHA256

1646c032c7726fb2da7301eda1caeaef06645aec7b65be34e4cd4ae8dd96b36e
SHA512

955dd63a5853a0f36272694186bdd9de44a5698c63d1a1a5b69407edd1c7cae8aa925f44bf70bb55fd2f503442a0dc5920f015268e3bc83ee06b3108ca9cb889
SSDEEP

768:wvxxY6H50BFFZFOO+Q548Szj4g/7aygIhWk6q:CxYBBF0O+Q541j4Nuv

Score

7^/10

persistence

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
4496	rundll32.exe
4496	rundll32.exe
6076	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\\tuvUNeed.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

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

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1B44E59C-165C-4EE2-B3CD-4DFD348BE123}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1B44E59C-165C-4EE2-B3CD-4DFD348BE123}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1B44E59C-165C-4EE2-B3CD-4DFD348BE123}\InprocServer32\ = "C:\\Windows\\SysWow64\\tuvUNeed.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1B44E59C-165C-4EE2-B3CD-4DFD348BE123}\InprocServer32\ThreadingModel = "Both"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4496	rundll32.exe
4496	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe
6076	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
4496	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4496	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4496	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1096 wrote to memory of 4496	1096	rundll32.exe	87
PID 1096 wrote to memory of 4496	1096	rundll32.exe	87
PID 1096 wrote to memory of 4496	1096	rundll32.exe	87
PID 4496 wrote to memory of 612	4496	rundll32.exe	5
PID 4496 wrote to memory of 6076	4496	rundll32.exe	106
PID 4496 wrote to memory of 6076	4496	rundll32.exe	106
PID 4496 wrote to memory of 6076	4496	rundll32.exe	106

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

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\dfcb5869a53b77b0508febddfac186ea.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1096
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\dfcb5869a53b77b0508febddfac186ea.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:4496
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Windows\system32\tuvUNeed.dll,a
    3⤵
    - Loads dropped DLL
    - Adds Run key to start application
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    PID:6076

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\tuvUNeed.dll

Filesize
32KB

MD5
dfcb5869a53b77b0508febddfac186ea

SHA1
e823deea9bec03a8171fb03c00224217aff78a06

SHA256
1646c032c7726fb2da7301eda1caeaef06645aec7b65be34e4cd4ae8dd96b36e

SHA512
955dd63a5853a0f36272694186bdd9de44a5698c63d1a1a5b69407edd1c7cae8aa925f44bf70bb55fd2f503442a0dc5920f015268e3bc83ee06b3108ca9cb889

Download Submit
memory/4496-0-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/4496-1-0x00000000007E0000-0x00000000007E5000-memory.dmp

Filesize
20KB

Download
memory/4496-8-0x00000000023D0000-0x00000000023E0000-memory.dmp

Filesize
64KB

Download
memory/4496-9-0x00000000023E0000-0x00000000023E5000-memory.dmp

Filesize
20KB

Download
memory/4496-10-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/4496-14-0x00000000007E0000-0x00000000007E5000-memory.dmp

Filesize
20KB

Download
memory/6076-17-0x0000000002620000-0x0000000002625000-memory.dmp

Filesize
20KB

Download
memory/6076-18-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/6076-20-0x0000000002620000-0x0000000002625000-memory.dmp

Filesize
20KB

Download