751fdabcd6c0ad8dd48018975e8102478d74a91115e5d9866d786873749d2291

Analysis

max time kernel
113s
max time network
130s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
29/11/2022, 07:43

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General

Target

751fdabcd6c0ad8dd48018975e8102478d74a91115e5d9866d786873749d2291.dll
Size

236KB
MD5

f542dac395c13cbac3c48e0db4bd5aed
SHA1

1a0faaaf10bb478143a221812605f0712ff8e649
SHA256

751fdabcd6c0ad8dd48018975e8102478d74a91115e5d9866d786873749d2291
SHA512

0638a9d48e19de38422736181b797435768f792dc0157c7af69296d308cf65d4b107113ac390c2edf31baddb6b408abb9114b66b1b44f26f5de1c144a42967f2
SSDEEP

3072:SeqmgHwlaazN9U3J+P0wFp+bLrt2wkkI8:+Qj9U3jwO3rt5P

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

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\afaxomwnb = "{cfaf6ead-4727-9c7c-5838-4727e625fb0e}"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
2124	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{cfaf6ead-4727-9c7c-5838-4727e625fb0e}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{cfaf6ead-4727-9c7c-5838-4727e625fb0e}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{cfaf6ead-4727-9c7c-5838-4727e625fb0e}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{cfaf6ead-4727-9c7c-5838-4727e625fb0e}\InprocServer32\ = "C:\\Windows\\SysWow64\\vavsjhriw.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{cfaf6ead-4727-9c7c-5838-4727e625fb0e}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2124	rundll32.exe
2124	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2124	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2124	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1180 wrote to memory of 2124	1180	rundll32.exe	80
PID 1180 wrote to memory of 2124	1180	rundll32.exe	80
PID 1180 wrote to memory of 2124	1180	rundll32.exe	80

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\751fdabcd6c0ad8dd48018975e8102478d74a91115e5d9866d786873749d2291.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1180
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\751fdabcd6c0ad8dd48018975e8102478d74a91115e5d9866d786873749d2291.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:2124

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\nsnkbzjao.dll

Filesize
478KB

MD5
e99416267b61f52fa5ab994019efd359

SHA1
86d31eae707db7fe51d2556394fcf0e8e9f6b0fd

SHA256
768c286674371564b5e6095edb56e0a4231f341be895da69cfccca5160029774

SHA512
0a1c7579a9c787c2c1bef35f0660e72e74b42824e14ebea63b87ed25ddaf107e3746567bb431cab41a2f6719fad2c22d96e0715a1fe085d75805d7d66f7f05ae

Download Submit
memory/2124-134-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/2124-135-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download