16ea9a8841b481476dea7c8471653b58cd2969c529b0a9aa1fd4dc0b987c34eb

Analysis

max time kernel
90s
max time network
154s
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, 05:54

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General

Target

16ea9a8841b481476dea7c8471653b58cd2969c529b0a9aa1fd4dc0b987c34eb.dll
Size

231KB
MD5

5c99f42e80422ce649f52c623ab045d2
SHA1

d6c1761de7f2a59acf73d004227101511ee4af43
SHA256

16ea9a8841b481476dea7c8471653b58cd2969c529b0a9aa1fd4dc0b987c34eb
SHA512

1461dd32d4c0f5fdc89d27b69ca39693c0f0b3d8a6eb72f7748f811357ac218b6dbd8b7b3b0d82d0e513a26c2ca0dd60e873efc41ac4e1baed7c05b0d6395cd7
SSDEEP

3072:zysX0WxnWd/IkmL+PViEbmzwtz/wk8YWbG:mskd/IkmuVfyWdMG

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\dejop = "{983279c5-10ba-650f-21cb-10baf14de5ed}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
4940	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{983279c5-10ba-650f-21cb-10baf14de5ed}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{983279c5-10ba-650f-21cb-10baf14de5ed}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{983279c5-10ba-650f-21cb-10baf14de5ed}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{983279c5-10ba-650f-21cb-10baf14de5ed}\InprocServer32\ = "C:\\Windows\\SysWow64\\yzejk.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{983279c5-10ba-650f-21cb-10baf14de5ed}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4940	rundll32.exe
4940	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4940	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4940	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4204 wrote to memory of 4940	4204	rundll32.exe	80
PID 4204 wrote to memory of 4940	4204	rundll32.exe	80
PID 4204 wrote to memory of 4940	4204	rundll32.exe	80

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\16ea9a8841b481476dea7c8471653b58cd2969c529b0a9aa1fd4dc0b987c34eb.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4204
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\16ea9a8841b481476dea7c8471653b58cd2969c529b0a9aa1fd4dc0b987c34eb.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:4940

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\qrwbc.dll

Filesize
478KB

MD5
e99416267b61f52fa5ab994019efd359

SHA1
86d31eae707db7fe51d2556394fcf0e8e9f6b0fd

SHA256
768c286674371564b5e6095edb56e0a4231f341be895da69cfccca5160029774

SHA512
0a1c7579a9c787c2c1bef35f0660e72e74b42824e14ebea63b87ed25ddaf107e3746567bb431cab41a2f6719fad2c22d96e0715a1fe085d75805d7d66f7f05ae

Download Submit
memory/4940-133-0x0000000000850000-0x0000000000893000-memory.dmp

Filesize
268KB

Download
memory/4940-135-0x0000000000850000-0x0000000000893000-memory.dmp

Filesize
268KB

Download
memory/4940-136-0x0000000000850000-0x0000000000893000-memory.dmp

Filesize
268KB

Download