dd14d8c8bf76437503cc28ae10cdbf2d7a914833c5a111b368bd1a7433ec7201

Analysis

max time kernel
141s
max time network
155s
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, 21:52

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General

Target

04e388933eab8600c45e65e2470c6b33.dll
Size

236KB
MD5

04e388933eab8600c45e65e2470c6b33
SHA1

6ab499dd9e9d14578db0bed8fb7ca63a4a08e1d2
SHA256

dd14d8c8bf76437503cc28ae10cdbf2d7a914833c5a111b368bd1a7433ec7201
SHA512

175f89cfcf465ebad4d7752d18ced332e927f2e13b9de40220305cd259c5db9f14e1b3a4480d8fe41db92116556230de650a16b1bc8282490c1fb581cf9f3864
SSDEEP

1536:1dKaTHN2ymZ0ofa5uQm4V7HG8ldINh+RhFtFftCgpcGO5lPf/XG8GmGwktbG:1Y4tIQG8XAmbFfaGc1fawk1G

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\hwt = "{78d8ab91-f050-45a5-0161-f0502319e3ec}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
2768	rundll32.exe

Drops file in System32 directory 4 IoCs

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

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{78d8ab91-f050-45a5-0161-f0502319e3ec}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{78d8ab91-f050-45a5-0161-f0502319e3ec}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{78d8ab91-f050-45a5-0161-f0502319e3ec}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{78d8ab91-f050-45a5-0161-f0502319e3ec}\InprocServer32\ = "C:\\Windows\\SysWow64\\cro.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{78d8ab91-f050-45a5-0161-f0502319e3ec}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2768	rundll32.exe
2768	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2768	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2768	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1260 wrote to memory of 2768	1260	rundll32.exe	87
PID 1260 wrote to memory of 2768	1260	rundll32.exe	87
PID 1260 wrote to memory of 2768	1260	rundll32.exe	87

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\04e388933eab8600c45e65e2470c6b33.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1260
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\04e388933eab8600c45e65e2470c6b33.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:2768

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\ujg.dll

Filesize
478KB

MD5
e99416267b61f52fa5ab994019efd359

SHA1
86d31eae707db7fe51d2556394fcf0e8e9f6b0fd

SHA256
768c286674371564b5e6095edb56e0a4231f341be895da69cfccca5160029774

SHA512
0a1c7579a9c787c2c1bef35f0660e72e74b42824e14ebea63b87ed25ddaf107e3746567bb431cab41a2f6719fad2c22d96e0715a1fe085d75805d7d66f7f05ae

Download Submit
memory/2768-0-0x0000000002230000-0x0000000002274000-memory.dmp

Filesize
272KB

Download
memory/2768-2-0x0000000002230000-0x0000000002274000-memory.dmp

Filesize
272KB

Download
memory/2768-8-0x0000000076FE0000-0x000000007705A000-memory.dmp

Filesize
488KB

Download
memory/2768-9-0x0000000002230000-0x0000000002274000-memory.dmp

Filesize
272KB

Download
memory/2768-10-0x0000000076FE0000-0x000000007705A000-memory.dmp

Filesize
488KB

Download
memory/2768-13-0x0000000002230000-0x0000000002274000-memory.dmp

Filesize
272KB

Download
memory/2768-14-0x0000000076FE0000-0x000000007705A000-memory.dmp

Filesize
488KB

Download