520e5c46aad0f53f5640eb05deed53849667f082d6e6af778e2d9880839633b5

Analysis

max time kernel
140s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
29/12/2023, 23:42

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General

Target

074e0e675ea532ac65749611be68ffa0.dll
Size

236KB
MD5

074e0e675ea532ac65749611be68ffa0
SHA1

ac6ba66c0adaeae092c7d67fcfebeddd6bf54efd
SHA256

520e5c46aad0f53f5640eb05deed53849667f082d6e6af778e2d9880839633b5
SHA512

1a7f5fe3d7b6ce3bec651492815f9f84a52b58212690fcec0efb7dd0be40ff952b68ffe933571ca37cff630fc4043e8f2d26db6c430524205e92dff908bf7bd0
SSDEEP

3072:SeqmgHwlaazN9U3J+P0wFp+bLrt2wkkI0:+Qj9U3jwO3rt5L

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\ocwjxds = "{4e2bb74c-c6a3-1bf8-d7b4-c6a33fc43694}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
2928	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4e2bb74c-c6a3-1bf8-d7b4-c6a33fc43694}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4e2bb74c-c6a3-1bf8-d7b4-c6a33fc43694}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4e2bb74c-c6a3-1bf8-d7b4-c6a33fc43694}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4e2bb74c-c6a3-1bf8-d7b4-c6a33fc43694}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4e2bb74c-c6a3-1bf8-d7b4-c6a33fc43694}\InprocServer32\ = "C:\\Windows\\SysWow64\\jxresyn.dll"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2928	rundll32.exe
2928	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2928	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2928	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1012 wrote to memory of 2928	1012	rundll32.exe	87
PID 1012 wrote to memory of 2928	1012	rundll32.exe	87
PID 1012 wrote to memory of 2928	1012	rundll32.exe	87

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\074e0e675ea532ac65749611be68ffa0.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1012
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\074e0e675ea532ac65749611be68ffa0.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:2928

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\bpjwkqf.dll

Filesize
478KB

MD5
e99416267b61f52fa5ab994019efd359

SHA1
86d31eae707db7fe51d2556394fcf0e8e9f6b0fd

SHA256
768c286674371564b5e6095edb56e0a4231f341be895da69cfccca5160029774

SHA512
0a1c7579a9c787c2c1bef35f0660e72e74b42824e14ebea63b87ed25ddaf107e3746567bb431cab41a2f6719fad2c22d96e0715a1fe085d75805d7d66f7f05ae

Download Submit
memory/2928-0-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/2928-7-0x0000000077A60000-0x0000000077ADA000-memory.dmp

Filesize
488KB

Download
memory/2928-10-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/2928-11-0x0000000077A60000-0x0000000077ADA000-memory.dmp

Filesize
488KB

Download