1546f8e9257db1c4336184caaf332c710b302703f60527b6640c25a4df695f5d

Analysis

max time kernel
151s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
11-01-2024 13:37

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General

Target

53a99f633174b02d9652a773c1252b03.dll
Size

33KB
MD5

53a99f633174b02d9652a773c1252b03
SHA1

2449fce9052287a95f1e01ae10fdebf8a3fee1d3
SHA256

1546f8e9257db1c4336184caaf332c710b302703f60527b6640c25a4df695f5d
SHA512

5eaa7889222ee6a4b7508f0c89d71f56e00ea107f34a3bdbe2ee73b66bb8e0252c2ed7e5ad1e6c823004958bbb745466e903d32fbaa990fefdecc6e166de4b5b
SSDEEP

768:re4TH/zy0W5defiInLF5a/nAC+JLyrUUk/g:64fzyD5aiIZ5a/ACCCF3

Score

7^/10

persistence

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
4628	rundll32.exe
4628	rundll32.exe
3428	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\\xxyyaXoO.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

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

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{28030FA8-2428-4DE6-B0F3-CE9494E1A412}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{28030FA8-2428-4DE6-B0F3-CE9494E1A412}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{28030FA8-2428-4DE6-B0F3-CE9494E1A412}\InprocServer32\ = "C:\\Windows\\SysWow64\\xxyyaXoO.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{28030FA8-2428-4DE6-B0F3-CE9494E1A412}\InprocServer32\ThreadingModel = "Both"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4628	rundll32.exe
4628	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe
3428	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
4628	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4628	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4628	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 4628	1972	rundll32.exe	88
PID 1972 wrote to memory of 4628	1972	rundll32.exe	88
PID 1972 wrote to memory of 4628	1972	rundll32.exe	88
PID 4628 wrote to memory of 624	4628	rundll32.exe	3
PID 4628 wrote to memory of 3428	4628	rundll32.exe	103
PID 4628 wrote to memory of 3428	4628	rundll32.exe	103
PID 4628 wrote to memory of 3428	4628	rundll32.exe	103

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

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\53a99f633174b02d9652a773c1252b03.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1972
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\53a99f633174b02d9652a773c1252b03.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:4628
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Windows\system32\xxyyaXoO.dll,a
    3⤵
    - Loads dropped DLL
    - Adds Run key to start application
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    PID:3428

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\xxyyaXoO.dll

Filesize
33KB

MD5
53a99f633174b02d9652a773c1252b03

SHA1
2449fce9052287a95f1e01ae10fdebf8a3fee1d3

SHA256
1546f8e9257db1c4336184caaf332c710b302703f60527b6640c25a4df695f5d

SHA512
5eaa7889222ee6a4b7508f0c89d71f56e00ea107f34a3bdbe2ee73b66bb8e0252c2ed7e5ad1e6c823004958bbb745466e903d32fbaa990fefdecc6e166de4b5b

Download Submit
memory/3428-20-0x0000000001120000-0x0000000001125000-memory.dmp

Filesize
20KB

Download
memory/3428-19-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/3428-21-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/3428-23-0x0000000001120000-0x0000000001125000-memory.dmp

Filesize
20KB

Download
memory/4628-0-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/4628-1-0x0000000000BD0000-0x0000000000BD5000-memory.dmp

Filesize
20KB

Download
memory/4628-8-0x0000000000D00000-0x0000000000D10000-memory.dmp

Filesize
64KB

Download
memory/4628-9-0x0000000000D10000-0x0000000000D15000-memory.dmp

Filesize
20KB

Download
memory/4628-10-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/4628-14-0x0000000000BD0000-0x0000000000BD5000-memory.dmp

Filesize
20KB

Download