bdd3f0e846f4c3aa1531049ad6c833e1ad5afae1c869063410ea927061f599cd

Analysis

max time kernel
146s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
01/12/2022, 18:32

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General

Target

bdd3f0e846f4c3aa1531049ad6c833e1ad5afae1c869063410ea927061f599cd.dll
Size

236KB
MD5

e4c2d1e7df0e33ee1996bf1efd8fba0b
SHA1

2f2af265b0802113318a09f4b792e28f217aa90a
SHA256

bdd3f0e846f4c3aa1531049ad6c833e1ad5afae1c869063410ea927061f599cd
SHA512

d58d53000d5f7dd9387dce329ca2729ee3f7108b5916de97e2c43375a3641971907cdb00ffa09a10b6bf0ac53c8a583e763cc42cfb2455b588774dfce31db662
SSDEEP

3072:3F24fliN+7XlmZKxbLYH1rhAwHL5K2W5QVgxwkFy:3F24flic7X8ZibLYHFhAkKZYgny

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\lumepezjn = "{9ae4fcdb-126c-67b1-237d-126c7453d4f8}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
3284	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9ae4fcdb-126c-67b1-237d-126c7453d4f8}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9ae4fcdb-126c-67b1-237d-126c7453d4f8}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9ae4fcdb-126c-67b1-237d-126c7453d4f8}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9ae4fcdb-126c-67b1-237d-126c7453d4f8}\InprocServer32\ = "C:\\Windows\\SysWow64\\gphzkzuei.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9ae4fcdb-126c-67b1-237d-126c7453d4f8}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3284	rundll32.exe
3284	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3284	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3284	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1104 wrote to memory of 3284	1104	rundll32.exe	81
PID 1104 wrote to memory of 3284	1104	rundll32.exe	81
PID 1104 wrote to memory of 3284	1104	rundll32.exe	81

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\bdd3f0e846f4c3aa1531049ad6c833e1ad5afae1c869063410ea927061f599cd.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1104
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\bdd3f0e846f4c3aa1531049ad6c833e1ad5afae1c869063410ea927061f599cd.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:3284

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\yhzrcrmwa.dll

Filesize
478KB

MD5
e99416267b61f52fa5ab994019efd359

SHA1
86d31eae707db7fe51d2556394fcf0e8e9f6b0fd

SHA256
768c286674371564b5e6095edb56e0a4231f341be895da69cfccca5160029774

SHA512
0a1c7579a9c787c2c1bef35f0660e72e74b42824e14ebea63b87ed25ddaf107e3746567bb431cab41a2f6719fad2c22d96e0715a1fe085d75805d7d66f7f05ae

Download Submit
memory/3284-134-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/3284-135-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download