6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12

Analysis

max time kernel
120s
max time network
121s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
20/09/2024, 12:40

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General

Target

6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.exe
Size

211KB
MD5

b8d5396cea016bbc4b4911a14a8d6260
SHA1

fb87f9231e9f2e6438be13876cf9ca5345507f6f
SHA256

6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12
SHA512

969a846371efe4cf4428a32a68b4e38dcdd2bf41bcbcd9a01e27dd751cee5516aa9c971fc581e30db737bb6f5820cb324fba60724ce5f527c9dc6c1922418b73
SSDEEP

3072:JD6Xtx68yygRBE52mxkEOHLRMpZ4deth8PEAjAfIbAYGPhz6sPJBInxZqOU:Jh8cBzHLRMpZ4d1ZU

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 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
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

Executes dropped EXE 4 IoCs

pid	Process
4120	userinit.exe
720	spoolsw.exe
872	swchost.exe
2436	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	6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.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	6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.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
4016	6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.exe
4016	6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.exe
4120	userinit.exe
4120	userinit.exe
4120	userinit.exe
4120	userinit.exe
4120	userinit.exe
4120	userinit.exe
872	swchost.exe
872	swchost.exe
872	swchost.exe
872	swchost.exe
4120	userinit.exe
872	swchost.exe
4120	userinit.exe
872	swchost.exe
4120	userinit.exe
872	swchost.exe
4120	userinit.exe
872	swchost.exe
872	swchost.exe
4120	userinit.exe
872	swchost.exe
4120	userinit.exe
872	swchost.exe
4120	userinit.exe
872	swchost.exe
4120	userinit.exe
4120	userinit.exe
872	swchost.exe
4120	userinit.exe
872	swchost.exe
4120	userinit.exe
872	swchost.exe
4120	userinit.exe
872	swchost.exe
872	swchost.exe
4120	userinit.exe
4120	userinit.exe
872	swchost.exe
872	swchost.exe
4120	userinit.exe
4120	userinit.exe
872	swchost.exe
4120	userinit.exe
872	swchost.exe
872	swchost.exe
4120	userinit.exe
872	swchost.exe
4120	userinit.exe
4120	userinit.exe
872	swchost.exe
872	swchost.exe
4120	userinit.exe
872	swchost.exe
4120	userinit.exe
872	swchost.exe
4120	userinit.exe
872	swchost.exe
4120	userinit.exe
872	swchost.exe
4120	userinit.exe
4120	userinit.exe
872	swchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
4120	userinit.exe
872	swchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
4016	6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.exe
4016	6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.exe
4120	userinit.exe
4120	userinit.exe
720	spoolsw.exe
720	spoolsw.exe
872	swchost.exe
872	swchost.exe
2436	spoolsw.exe
2436	spoolsw.exe
4120	userinit.exe
4120	userinit.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4016 wrote to memory of 4120	4016	6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.exe	90
PID 4016 wrote to memory of 4120	4016	6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.exe	90
PID 4016 wrote to memory of 4120	4016	6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.exe	90
PID 4120 wrote to memory of 720	4120	userinit.exe	91
PID 4120 wrote to memory of 720	4120	userinit.exe	91
PID 4120 wrote to memory of 720	4120	userinit.exe	91
PID 720 wrote to memory of 872	720	spoolsw.exe	92
PID 720 wrote to memory of 872	720	spoolsw.exe	92
PID 720 wrote to memory of 872	720	spoolsw.exe	92
PID 872 wrote to memory of 2436	872	swchost.exe	93
PID 872 wrote to memory of 2436	872	swchost.exe	93
PID 872 wrote to memory of 2436	872	swchost.exe	93

C:\Users\Admin\AppData\Local\Temp\6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.exe
"C:\Users\Admin\AppData\Local\Temp\6966abeae5c51d169fc04e631bdb3f510c33322430151d8b8835a5a070b53c12N.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:4016
- \??\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:4120
- - \??\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:720
  - - \??\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:872
    - - \??\c:\windows\spoolsw.exe
        
        c:\windows\spoolsw.exe PR
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:2436

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=4400,i,10597648459838880772,16562651767759956329,262144 --variations-seed-version --mojo-platform-channel-handle=4164 /prefetch:8
1⤵
PID:3304

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
88aded53aaf8a9d743c62233985be66e

SHA1
0ccb0745827577f803c98776d8f80bf2e9b8061b

SHA256
13085f71a9786425a67d43fef4453b5dd44af0853af23475367a31a4f27d882a

SHA512
60c59aa163d859fa52d78edf17377ac9dd8e00ae592cbb3f03870cbdbe9d8f1f32c435be58ab5754f9e6ded9ea9ef4040b52f17de7efcbf963e2fa1c5c73e4cf

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C:\Windows\spoolsw.exe

Filesize
211KB

MD5
e8a4d15bd57dee819fddf2c0063641da

SHA1
b16edf114dbe94802b53eab4a3cebb36b7937287

SHA256
de42f15dbb6ef9ce0eb706b1922f38c218615e600650a205f14b30391f6e7f87

SHA512
d07c6d889048b9d8b82a42c808c83c8ab58716afe44c8a00599ccef75f6d0c8957b86d3bed04bfd3db3e57973a84328fd4b95a7df84a8b06df21c396cdb6fe4c

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C:\Windows\swchost.exe

Filesize
211KB

MD5
bd4be03d44ebcc2a379296fe02c9f2b1

SHA1
eaf7dba7ce54b9fc5a4101a6b753fc4e2f67c593

SHA256
cb4e3c52316a55b58529a7e5f69e0d27d5f26890774e6bf3197b143d6d272673

SHA512
b145036d9b9751ac44c714df1de926cbcde8b981838508bd1921be9aa84ee4e3d0bccf444e35e590e303eef0771ddec99ec74a798b7e9accb569691d5b622cf9

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C:\Windows\userinit.exe

Filesize
211KB

MD5
aa58f4d3ae3eec5a85c6b2596b6476db

SHA1
c64f85b944169a15dbea480e35b52217d2961ca9

SHA256
daed9c7179b6d3e576821302e706fa24489433d1bdae67a24625cc196cb0f6b5

SHA512
c78b0ec2296838bc68df376d36138ff529cc9220069a5f1a12e590cb1deef4e682a1e0693903e32d72bec2820809d14eaa8b5b377ea3c5452c0600781c4eb832

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