13bfbc005ad4a34859fd020c9620a7c02c45673957661d677a37fdbcf07e3e26

Analysis

max time kernel
147s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
24/06/2024, 02:26

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General

Target

03fd11ed56c9d749953c5201d75416be.dll
Size

241KB
MD5

03fd11ed56c9d749953c5201d75416be
SHA1

8717f6937efe3edc6d9e2f23bacecf1c40fc450b
SHA256

13bfbc005ad4a34859fd020c9620a7c02c45673957661d677a37fdbcf07e3e26
SHA512

d78e4d0c9048d0bfe67d0975b84e9c0bc0dbe4c4a2fbbf68e5039fef2bc6029ae87129b08c6919be3fdd850ab347d7a31ba7eb2484188b29be9845d0cea2b49b
SSDEEP

1536:f64nc42nBVhe6ythK0hj4QUc/lIoviS0hC2pyOd31YspvaO5PWWs0wGkG77rWkdX:fHCVk9Rhjd/4NGS3DacqO7rWkdT

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\bujowxlim = "{5cde2fb2-d456-29ab-e567-d456a73a4c2c}"	rundll32.exe

Loads dropped DLL 2 IoCs

pid	Process
4420	rundll32.exe
4420	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\ohwbjkyvz.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\ohwbjkyvz.dll	rundll32.exe
File created	C:\Windows\SysWOW64\atinvwkhl.dll	rundll32.exe
File created	C:\Windows\SysWOW64\wpejrsgdh.dll	rundll32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5cde2fb2-d456-29ab-e567-d456a73a4c2c}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5cde2fb2-d456-29ab-e567-d456a73a4c2c}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5cde2fb2-d456-29ab-e567-d456a73a4c2c}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5cde2fb2-d456-29ab-e567-d456a73a4c2c}\InprocServer32\ = "C:\\Windows\\SysWow64\\wpejrsgdh.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5cde2fb2-d456-29ab-e567-d456a73a4c2c}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4420	rundll32.exe
4420	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4420	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4420	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2360 wrote to memory of 4420	2360	rundll32.exe	80
PID 2360 wrote to memory of 4420	2360	rundll32.exe	80
PID 2360 wrote to memory of 4420	2360	rundll32.exe	80

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\03fd11ed56c9d749953c5201d75416be.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2360
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\03fd11ed56c9d749953c5201d75416be.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:4420

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\atinvwkhl.dll

Filesize
625KB

MD5
eccf28d7e5ccec24119b88edd160f8f4

SHA1
98509587a3d37a20b56b50fd57f823a1691a034c

SHA256
820c83c0533cfce2928e29edeaf6c255bc19ac9718b25a5656d99ffac30a03d6

SHA512
c1c94bbb781625b2317f0a8178d3a10d891fb71bca8f82cd831c484e8ab125301b82a14fe2ff070dc99a496cc00234300fa5536401018c40d49d44ae89409670

Download Submit
C:\Windows\SysWOW64\ohwbjkyvz.dll

Filesize
478KB

MD5
e99416267b61f52fa5ab994019efd359

SHA1
86d31eae707db7fe51d2556394fcf0e8e9f6b0fd

SHA256
768c286674371564b5e6095edb56e0a4231f341be895da69cfccca5160029774

SHA512
0a1c7579a9c787c2c1bef35f0660e72e74b42824e14ebea63b87ed25ddaf107e3746567bb431cab41a2f6719fad2c22d96e0715a1fe085d75805d7d66f7f05ae

Download Submit
memory/4420-12-0x0000000075E3E000-0x0000000075E3F000-memory.dmp

Filesize
4KB

Download
memory/4420-13-0x0000000075E20000-0x0000000075E9A000-memory.dmp

Filesize
488KB

Download
memory/4420-14-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/4420-16-0x0000000075E20000-0x0000000075E9A000-memory.dmp

Filesize
488KB

Download
memory/4420-17-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download