106171ba77bb1bbd0f4d3e52fec22430e6c1864a94c7ae80e5b0c6c590285b33

Analysis

max time kernel
39s
max time network
122s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
31/12/2023, 04:55

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General

Target

2904d2af7581f1af6e4ba7a4e8522edf.dll
Size

25KB
MD5

2904d2af7581f1af6e4ba7a4e8522edf
SHA1

0f180073f8f9714773fe762f2d2cf3024139afbb
SHA256

106171ba77bb1bbd0f4d3e52fec22430e6c1864a94c7ae80e5b0c6c590285b33
SHA512

f49b5fcebe85b6fe4549816afe571dffd297ebfc7426c80d5d6ed62aaefd1528cf5e3fb8eecf0c259d3afef2fe377d98e25422be03af50f7fb0aab546bbeabc0
SSDEEP

384:mdZibPLqEH883VHVkTlHOl4/cHK3b4y9T00TTWSyA/YNDtrHEyy:mT8qgoSpHK560TTWSqNDtrq

Score

7^/10

persistence

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
3168	rundll32.exe
3168	rundll32.exe
3496	rundll32.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSServer = "rundll32.exe C:\\Windows\\system32\\geBrqolJ.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

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

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F6BB0E4E-AC9D-496A-8984-74AE48321127}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F6BB0E4E-AC9D-496A-8984-74AE48321127}\InprocServer32\ = "C:\\Windows\\SysWow64\\geBrqolJ.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F6BB0E4E-AC9D-496A-8984-74AE48321127}\InprocServer32\ThreadingModel = "Both"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F6BB0E4E-AC9D-496A-8984-74AE48321127}	rundll32.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
3168	rundll32.exe
3168	rundll32.exe
3496	rundll32.exe
3496	rundll32.exe
3496	rundll32.exe
3496	rundll32.exe
3496	rundll32.exe
3496	rundll32.exe
3496	rundll32.exe
3496	rundll32.exe
3496	rundll32.exe
3496	rundll32.exe
3496	rundll32.exe
3496	rundll32.exe
3496	rundll32.exe
3496	rundll32.exe
3496	rundll32.exe
3496	rundll32.exe
3496	rundll32.exe
3496	rundll32.exe
3496	rundll32.exe
3496	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
3168	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3168	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3168	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 4328 wrote to memory of 3168	4328	rundll32.exe	16
PID 4328 wrote to memory of 3168	4328	rundll32.exe	16
PID 4328 wrote to memory of 3168	4328	rundll32.exe	16
PID 3168 wrote to memory of 612	3168	rundll32.exe	86
PID 3168 wrote to memory of 3496	3168	rundll32.exe	100
PID 3168 wrote to memory of 3496	3168	rundll32.exe	100
PID 3168 wrote to memory of 3496	3168	rundll32.exe	100

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2904d2af7581f1af6e4ba7a4e8522edf.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4328
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\2904d2af7581f1af6e4ba7a4e8522edf.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: RenamesItself
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3168
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Windows\system32\geBrqolJ.dll,a
    3⤵
    - Loads dropped DLL
    - Adds Run key to start application
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    PID:3496

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:612

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

memory/3168-0-0x0000000010000000-0x0000000010013000-memory.dmp

Filesize
76KB

Download
memory/3168-9-0x00000000031F0000-0x0000000003203000-memory.dmp

Filesize
76KB

Download
memory/3168-6-0x00000000031F0000-0x0000000003203000-memory.dmp

Filesize
76KB

Download
memory/3168-1-0x0000000010000000-0x0000000010013000-memory.dmp

Filesize
76KB

Download
memory/3496-16-0x0000000010000000-0x0000000010013000-memory.dmp

Filesize
76KB

Download
memory/3496-17-0x0000000010000000-0x0000000010013000-memory.dmp

Filesize
76KB

Download