d922ddb5c0ab8dec2985feef448bd1d0d0a54bb588c64beb10ae50568b139eef

Analysis

max time kernel
89s
max time network
132s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
06/11/2022, 07:15

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General

Target

d922ddb5c0ab8dec2985feef448bd1d0d0a54bb588c64beb10ae50568b139eef.dll
Size

236KB
MD5

13900688bace465c21e4ec9d46691ee8
SHA1

2c13a33687516e77707225185b6205cb782d57be
SHA256

d922ddb5c0ab8dec2985feef448bd1d0d0a54bb588c64beb10ae50568b139eef
SHA512

88cf8f016c5c9b178492e8c2dab32790ff1ab003e04d73c558298d18c16667d835b43f8aec44d6af335dc63199b0f3d98b4ea1fada0289a58100b9ff72a61235
SSDEEP

3072:SeqmgHwlaazN9U3J+P0wFp+bLrt2wkkIj:+Qj9U3jwO3rt5s

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
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\lumsbkc = "{5a2812ac-d2a0-27f5-e3b1-d2a09a243753}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
3368	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5a2812ac-d2a0-27f5-e3b1-d2a09a243753}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5a2812ac-d2a0-27f5-e3b1-d2a09a243753}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5a2812ac-d2a0-27f5-e3b1-d2a09a243753}\InprocServer32\ = "C:\\Windows\\SysWow64\\gphnwfx.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5a2812ac-d2a0-27f5-e3b1-d2a09a243753}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5a2812ac-d2a0-27f5-e3b1-d2a09a243753}	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3368	rundll32.exe
3368	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3368	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3368	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5048 wrote to memory of 3368	5048	rundll32.exe	83
PID 5048 wrote to memory of 3368	5048	rundll32.exe	83
PID 5048 wrote to memory of 3368	5048	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\d922ddb5c0ab8dec2985feef448bd1d0d0a54bb588c64beb10ae50568b139eef.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5048
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\d922ddb5c0ab8dec2985feef448bd1d0d0a54bb588c64beb10ae50568b139eef.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:3368

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\yhzfoxp.dll

Filesize
478KB

MD5
e99416267b61f52fa5ab994019efd359

SHA1
86d31eae707db7fe51d2556394fcf0e8e9f6b0fd

SHA256
768c286674371564b5e6095edb56e0a4231f341be895da69cfccca5160029774

SHA512
0a1c7579a9c787c2c1bef35f0660e72e74b42824e14ebea63b87ed25ddaf107e3746567bb431cab41a2f6719fad2c22d96e0715a1fe085d75805d7d66f7f05ae

Download Submit
memory/3368-134-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/3368-135-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download