44eadfdc28b37838ade1899fb513e89a1f09aebcc18fd68ceb2fbf430ad22976

Analysis

max time kernel
161s
max time network
173s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
31/12/2023, 04:50

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General

Target

28dc60a6ff0ef3e13045b8e7f10fb28f.dll
Size

24KB
MD5

28dc60a6ff0ef3e13045b8e7f10fb28f
SHA1

ef552ef60e96754d046a243f5dba17722c9dc6bc
SHA256

44eadfdc28b37838ade1899fb513e89a1f09aebcc18fd68ceb2fbf430ad22976
SHA512

4650d2a8478886a8f689deb41b4c3164eab5e73486db3916042c96b3e951050f30f420d701e1d48c451b5eec7dcdb7461f9cd7f667997731d2bb2b5cdac269a1
SSDEEP

384:MBlOd2XeFT31dPM+3vnLqav2jisSdw/xID7XKyKnDDDIBDs8VeA:EOcwjPr3fYjRSG/GD/KnPcr1

Score

7^/10

persistence

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
2072	rundll32.exe
2072	rundll32.exe
4488	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\\xxyxUlLE.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

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

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8710FC9F-0816-49D7-AE14-4BA5269E838C}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8710FC9F-0816-49D7-AE14-4BA5269E838C}\InprocServer32\ = "C:\\Windows\\SysWow64\\xxyxUlLE.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8710FC9F-0816-49D7-AE14-4BA5269E838C}\InprocServer32\ThreadingModel = "Both"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8710FC9F-0816-49D7-AE14-4BA5269E838C}	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2072	rundll32.exe
2072	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe
4488	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
2072	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2072	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2072	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2288 wrote to memory of 2072	2288	rundll32.exe	90
PID 2288 wrote to memory of 2072	2288	rundll32.exe	90
PID 2288 wrote to memory of 2072	2288	rundll32.exe	90
PID 2072 wrote to memory of 612	2072	rundll32.exe	3
PID 2072 wrote to memory of 4488	2072	rundll32.exe	96
PID 2072 wrote to memory of 4488	2072	rundll32.exe	96
PID 2072 wrote to memory of 4488	2072	rundll32.exe	96

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

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\28dc60a6ff0ef3e13045b8e7f10fb28f.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2288
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\28dc60a6ff0ef3e13045b8e7f10fb28f.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:2072
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Windows\system32\xxyxUlLE.dll,a
    3⤵
    - Loads dropped DLL
    - Adds Run key to start application
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    PID:4488

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\xxyxUlLE.dll

Filesize
24KB

MD5
28dc60a6ff0ef3e13045b8e7f10fb28f

SHA1
ef552ef60e96754d046a243f5dba17722c9dc6bc

SHA256
44eadfdc28b37838ade1899fb513e89a1f09aebcc18fd68ceb2fbf430ad22976

SHA512
4650d2a8478886a8f689deb41b4c3164eab5e73486db3916042c96b3e951050f30f420d701e1d48c451b5eec7dcdb7461f9cd7f667997731d2bb2b5cdac269a1

Download Submit
memory/2072-12-0x0000000001FB0000-0x0000000001FC8000-memory.dmp

Filesize
96KB

Download
memory/2072-2-0x0000000010000000-0x0000000010018000-memory.dmp

Filesize
96KB

Download
memory/2072-3-0x0000000010000000-0x0000000010018000-memory.dmp

Filesize
96KB

Download
memory/2072-4-0x0000000010000000-0x0000000010018000-memory.dmp

Filesize
96KB

Download
memory/2072-1-0x0000000010000000-0x0000000010018000-memory.dmp

Filesize
96KB

Download
memory/2072-0-0x0000000000650000-0x0000000000655000-memory.dmp

Filesize
20KB

Download
memory/2072-11-0x0000000001FD0000-0x0000000001FD5000-memory.dmp

Filesize
20KB

Download
memory/2072-13-0x0000000000650000-0x0000000000655000-memory.dmp

Filesize
20KB

Download
memory/2072-15-0x0000000001FB0000-0x0000000001FC8000-memory.dmp

Filesize
96KB

Download
memory/2072-18-0x0000000001FD0000-0x0000000001FD5000-memory.dmp

Filesize
20KB

Download
memory/4488-23-0x0000000000C60000-0x0000000000C65000-memory.dmp

Filesize
20KB

Download
memory/4488-25-0x0000000010000000-0x0000000010018000-memory.dmp

Filesize
96KB

Download
memory/4488-26-0x0000000000C60000-0x0000000000C65000-memory.dmp

Filesize
20KB

Download