d72d2f0e6154799277900b2290c0c853cb37a2e0d6464492d6ec928c3c770811

Analysis

max time kernel
150s
max time network
128s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
02/10/2024, 02:11

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General

Target

d72d2f0e6154799277900b2290c0c853cb37a2e0d6464492d6ec928c3c770811N.exe
Size

211KB
MD5

7b1a668eb5c6d16ed9c06e6d7b5fcb40
SHA1

861076702455b7207cd93d36f7911fad16a56f89
SHA256

d72d2f0e6154799277900b2290c0c853cb37a2e0d6464492d6ec928c3c770811
SHA512

62441c1433b1b4977987f3498144a5634900333f0a599698e7323f5010169c8e9c38fcda9fd16940f40abc42baac59cf75bd331343dfdd5dc1b07aa5c4400ee5
SSDEEP

3072:WD6Xtx68yygRBE52mxkEOHLRMpZ4deth8PEAjAfIbAYGPhz6sPJBInxZqOf:Wh8cBzHLRMpZ4d1Zf

Score

10^/10

discovery evasion persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\userinit.exe"	userinit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\userinit.exe"	swchost.exe

Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	userinit.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	swchost.exe

Boot or Logon Autostart Execution: Active Setup 2 TTPs 8 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	swchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Local\\mrsys.exe MR"	swchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	swchost.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	userinit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}\StubPath = "C:\\Users\\Admin\\AppData\\Local\\mrsys.exe MR"	userinit.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}	swchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999}\StubPath = "C:\\Users\\Admin\\AppData\\Local\\mrsys.exe MR"	swchost.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666}	swchost.exe

Executes dropped EXE 4 IoCs

pid	Process
848	userinit.exe
1596	spoolsw.exe
2036	swchost.exe
3628	spoolsw.exe

Adds Run key to start application 2 TTPs 4 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\RunOnce\userinit = "c:\\windows\\userinit.exe RO"	userinit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Swchost = "c:\\windows\\swchost.exe RO"	userinit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\userinit = "c:\\windows\\userinit.exe RO"	swchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Swchost = "c:\\windows\\swchost.exe RO"	swchost.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\system\udsys.exe	userinit.exe

Drops file in Windows directory 5 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\userinit.exe	d72d2f0e6154799277900b2290c0c853cb37a2e0d6464492d6ec928c3c770811N.exe
File opened for modification	\??\c:\windows\spoolsw.exe	userinit.exe
File opened for modification	\??\c:\windows\swchost.exe	spoolsw.exe
File opened for modification	\??\c:\windows\userinit.exe	userinit.exe
File opened for modification	\??\c:\windows\swchost.exe	swchost.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d72d2f0e6154799277900b2290c0c853cb37a2e0d6464492d6ec928c3c770811N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	userinit.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	swchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	spoolsw.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4888	d72d2f0e6154799277900b2290c0c853cb37a2e0d6464492d6ec928c3c770811N.exe
4888	d72d2f0e6154799277900b2290c0c853cb37a2e0d6464492d6ec928c3c770811N.exe
848	userinit.exe
848	userinit.exe
848	userinit.exe
848	userinit.exe
848	userinit.exe
848	userinit.exe
2036	swchost.exe
2036	swchost.exe
2036	swchost.exe
2036	swchost.exe
848	userinit.exe
848	userinit.exe
2036	swchost.exe
2036	swchost.exe
848	userinit.exe
848	userinit.exe
2036	swchost.exe
2036	swchost.exe
848	userinit.exe
848	userinit.exe
2036	swchost.exe
2036	swchost.exe
848	userinit.exe
848	userinit.exe
2036	swchost.exe
2036	swchost.exe
848	userinit.exe
848	userinit.exe
2036	swchost.exe
2036	swchost.exe
848	userinit.exe
848	userinit.exe
2036	swchost.exe
2036	swchost.exe
848	userinit.exe
848	userinit.exe
2036	swchost.exe
2036	swchost.exe
848	userinit.exe
848	userinit.exe
2036	swchost.exe
2036	swchost.exe
848	userinit.exe
848	userinit.exe
2036	swchost.exe
2036	swchost.exe
848	userinit.exe
848	userinit.exe
2036	swchost.exe
2036	swchost.exe
848	userinit.exe
848	userinit.exe
2036	swchost.exe
2036	swchost.exe
848	userinit.exe
848	userinit.exe
2036	swchost.exe
2036	swchost.exe
848	userinit.exe
848	userinit.exe
2036	swchost.exe
2036	swchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
848	userinit.exe
2036	swchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
4888	d72d2f0e6154799277900b2290c0c853cb37a2e0d6464492d6ec928c3c770811N.exe
4888	d72d2f0e6154799277900b2290c0c853cb37a2e0d6464492d6ec928c3c770811N.exe
848	userinit.exe
848	userinit.exe
1596	spoolsw.exe
1596	spoolsw.exe
2036	swchost.exe
2036	swchost.exe
3628	spoolsw.exe
3628	spoolsw.exe
848	userinit.exe
848	userinit.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4888 wrote to memory of 848	4888	d72d2f0e6154799277900b2290c0c853cb37a2e0d6464492d6ec928c3c770811N.exe	90
PID 4888 wrote to memory of 848	4888	d72d2f0e6154799277900b2290c0c853cb37a2e0d6464492d6ec928c3c770811N.exe	90
PID 4888 wrote to memory of 848	4888	d72d2f0e6154799277900b2290c0c853cb37a2e0d6464492d6ec928c3c770811N.exe	90
PID 848 wrote to memory of 1596	848	userinit.exe	91
PID 848 wrote to memory of 1596	848	userinit.exe	91
PID 848 wrote to memory of 1596	848	userinit.exe	91
PID 1596 wrote to memory of 2036	1596	spoolsw.exe	92
PID 1596 wrote to memory of 2036	1596	spoolsw.exe	92
PID 1596 wrote to memory of 2036	1596	spoolsw.exe	92
PID 2036 wrote to memory of 3628	2036	swchost.exe	93
PID 2036 wrote to memory of 3628	2036	swchost.exe	93
PID 2036 wrote to memory of 3628	2036	swchost.exe	93

C:\Users\Admin\AppData\Local\Temp\d72d2f0e6154799277900b2290c0c853cb37a2e0d6464492d6ec928c3c770811N.exe
"C:\Users\Admin\AppData\Local\Temp\d72d2f0e6154799277900b2290c0c853cb37a2e0d6464492d6ec928c3c770811N.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4888
- \??\c:\windows\userinit.exe
  c:\windows\userinit.exe
  2⤵
  - Modifies WinLogon for persistence
  - Modifies visiblity of hidden/system files in Explorer
  - Boot or Logon Autostart Execution: Active Setup
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in System32 directory
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:848
- - \??\c:\windows\spoolsw.exe
    c:\windows\spoolsw.exe SE
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1596
  - - \??\c:\windows\swchost.exe
      c:\windows\swchost.exe
      4⤵
      Modifies WinLogon for persistence
      Modifies visiblity of hidden/system files in Explorer
      Boot or Logon Autostart Execution: Active Setup
      Executes dropped EXE
      Adds Run key to start application
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2036
    - - \??\c:\windows\spoolsw.exe
        
        c:\windows\spoolsw.exe PR
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:3628

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4228,i,10369132178352108590,11047993562598554317,262144 --variations-seed-version --mojo-platform-channel-handle=4184 /prefetch:8
1⤵
PID:3172

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Active Setup

T1547.014

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\mrsys.exe

Filesize
211KB

MD5
0ceea8f87dbd59baa6e2cb8f06ebf4a1

SHA1
9dea4cd321c9be5f3215f02645ae29a9e79d5a3c

SHA256
737b8e59be5d2846b2b0b5a4b1792398d1ca6dca39ad0fba365692098c574690

SHA512
85b34f3b86a811ec862fca94dff8498edfe30505e5d8ac86d4c473d792f54f476dab097d5c279b822ef96f9afbeadbd88874d94b181f171f1656558f95e714bb

Download Submit
C:\Windows\spoolsw.exe

Filesize
211KB

MD5
3c40f4e604de07c849b8aad883c1d9c6

SHA1
9b8662bc94b3614175c755f6f80141ba8b04d6e3

SHA256
ebbd49932c71ef20b4fca205fc46dc0a4e5e9419e24f29088ceddb7bafadee27

SHA512
0d4e8bcdfacee5d418789dfb0f6ec53d6f1ad179f34a282f124a02de67812a91857e3368254d536401b598a81778747cef47d0c8143bba271a86753476579c85

Download Submit
C:\Windows\swchost.exe

Filesize
211KB

MD5
8e35b41013f7114bd9040259b7a2a145

SHA1
efb9e78d863b8330374844410b34bd0938063967

SHA256
573d263010f03d026eba4c319e70d954e9898973dad6d7430ba6936d83becfe0

SHA512
060a9ca4c3399e35d1e93a64396aae2be6a68028bf7b218fddeaf610abecad7c24c988d88183dc4fcd38003d9562b91c97eeb6fb42e65c381098f8cf624c6e0f

Download Submit
C:\Windows\userinit.exe

Filesize
211KB

MD5
d08113dcd09a6947bdeaf3b34445323f

SHA1
f1ec7b118ad69a4dbe635260c5c9e7249dfdbca9

SHA256
2433b375031fd6488d3438b8e489b3ba96e1dcd5a7264248909aa4a9575e6d42

SHA512
d91fefeffb09924e01b30f8becf046b97fe0b3d46ba7ae2970257da44ffd404cbc1c088aea1bff7ca1885f74f48b61cd26734d72188784eb5a32714bb99d2edf

Download Submit
memory/848-38-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1596-35-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2036-39-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/3628-32-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/4888-0-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/4888-37-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download