dc5a7b8b6dc7f144bbe3226b50d0d12ea0ea2580ee2f39a7e69223d2e2f9ae61

Analysis

max time kernel
151s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
03-02-2024 19:16

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General

Target

8d21ac0aabeadb9c9ada5da147273841.dll
Size

25KB
MD5

8d21ac0aabeadb9c9ada5da147273841
SHA1

651840a45cc930a91ccfeb12bd3928d1c6ee06a8
SHA256

dc5a7b8b6dc7f144bbe3226b50d0d12ea0ea2580ee2f39a7e69223d2e2f9ae61
SHA512

aec5fa885c4fa246e231ad078f30071fd7dad8ea92b77c8e5481c7ee1a342702cc547ba72e01547bac4c6e95cbb3d700b35e2a06931a2a1ff0f08ace333051cf
SSDEEP

384:u09M5tj+MiQ7JGi+x1OTS4xDrXmvdJnGtM3oIjDQLtYH4bxj6/fWjxbkpjtJ:f9W6Q4dOmgXsdJnZ3JQRYHcRypjz

Score

7^/10

persistence

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
5092	rundll32.exe
5092	rundll32.exe
2252	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\\ljJYRLDS.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

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

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{E469A9C0-FF61-4815-932E-B93AF90D49C9}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{E469A9C0-FF61-4815-932E-B93AF90D49C9}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{E469A9C0-FF61-4815-932E-B93AF90D49C9}\InprocServer32\ = "C:\\Windows\\SysWow64\\ljJYRLDS.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{E469A9C0-FF61-4815-932E-B93AF90D49C9}\InprocServer32\ThreadingModel = "Both"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
5092	rundll32.exe
5092	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe
2252	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
5092	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5092	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5092	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 4528 wrote to memory of 5092	4528	rundll32.exe	84
PID 4528 wrote to memory of 5092	4528	rundll32.exe	84
PID 4528 wrote to memory of 5092	4528	rundll32.exe	84
PID 5092 wrote to memory of 624	5092	rundll32.exe	4
PID 5092 wrote to memory of 2252	5092	rundll32.exe	93
PID 5092 wrote to memory of 2252	5092	rundll32.exe	93
PID 5092 wrote to memory of 2252	5092	rundll32.exe	93

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:624

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8d21ac0aabeadb9c9ada5da147273841.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4528
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\8d21ac0aabeadb9c9ada5da147273841.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:5092
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Windows\system32\ljJYRLDS.dll,a
    3⤵
    - Loads dropped DLL
    - Adds Run key to start application
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    PID:2252

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\ljJYRLDS.dll

Filesize
25KB

MD5
8d21ac0aabeadb9c9ada5da147273841

SHA1
651840a45cc930a91ccfeb12bd3928d1c6ee06a8

SHA256
dc5a7b8b6dc7f144bbe3226b50d0d12ea0ea2580ee2f39a7e69223d2e2f9ae61

SHA512
aec5fa885c4fa246e231ad078f30071fd7dad8ea92b77c8e5481c7ee1a342702cc547ba72e01547bac4c6e95cbb3d700b35e2a06931a2a1ff0f08ace333051cf

Download Submit
memory/2252-18-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download
memory/2252-19-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download
memory/2252-20-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download
memory/5092-0-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download
memory/5092-1-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download
memory/5092-8-0x0000000000A20000-0x0000000000A32000-memory.dmp

Filesize
72KB

Download
memory/5092-9-0x0000000000A20000-0x0000000000A32000-memory.dmp

Filesize
72KB

Download
memory/5092-10-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download