e87530b9e3ddcac639f0daa12a689c4c24988167bd3cd0fbdf689ca0d4e3e221

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
24/12/2023, 14:32

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General

Target

012b5ba71f5f305cc8a1e5ad9d912d5c.dll
Size

236KB
MD5

012b5ba71f5f305cc8a1e5ad9d912d5c
SHA1

596991f010966b5865d43d30b33acb257a9f63dd
SHA256

e87530b9e3ddcac639f0daa12a689c4c24988167bd3cd0fbdf689ca0d4e3e221
SHA512

2627b5cd9d2cceb65608b68e1746dca3f9b5ec298620e673c688db3192c1bcffcf4a9605b9839a3a7da3653af220402802114f2a5a9c27ddb48382c376711270
SSDEEP

1536:Iguo2K86vta10RJQYPIHL+D5IWhxRh/Ci4ucg3/+k5ltr+DRPG8Gz7wk+cQvMf:Go256vS0RJAL+lHPKi40+66iwkD0A

Score

10^/10

persistence

Malware Config

Signatures

Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\lumfkhdrh = "{9ae96dd9-1261-67b6-2372-1261e551962f}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
4800	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9ae96dd9-1261-67b6-2372-1261e551962f}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9ae96dd9-1261-67b6-2372-1261e551962f}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9ae96dd9-1261-67b6-2372-1261e551962f}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9ae96dd9-1261-67b6-2372-1261e551962f}\InprocServer32\ = "C:\\Windows\\SysWow64\\gphafcymc.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9ae96dd9-1261-67b6-2372-1261e551962f}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4800	rundll32.exe
4800	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4800	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4800	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3488 wrote to memory of 4800	3488	rundll32.exe	78
PID 3488 wrote to memory of 4800	3488	rundll32.exe	78
PID 3488 wrote to memory of 4800	3488	rundll32.exe	78

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\012b5ba71f5f305cc8a1e5ad9d912d5c.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3488
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\012b5ba71f5f305cc8a1e5ad9d912d5c.dll,#1
  2⤵
  - Adds autorun key to be loaded by Explorer.exe on startup
  - Loads dropped DLL
  - Drops file in System32 directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:4800

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\yhzsxuqeu.dll

Filesize
478KB

MD5
e99416267b61f52fa5ab994019efd359

SHA1
86d31eae707db7fe51d2556394fcf0e8e9f6b0fd

SHA256
768c286674371564b5e6095edb56e0a4231f341be895da69cfccca5160029774

SHA512
0a1c7579a9c787c2c1bef35f0660e72e74b42824e14ebea63b87ed25ddaf107e3746567bb431cab41a2f6719fad2c22d96e0715a1fe085d75805d7d66f7f05ae

Download Submit
memory/4800-1-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/4800-7-0x0000000075050000-0x00000000750CA000-memory.dmp

Filesize
488KB

Download
memory/4800-10-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/4800-11-0x0000000075050000-0x00000000750CA000-memory.dmp

Filesize
488KB

Download