36c694d94e65408b05e8995078b32f08cd93269e8d5b6c43ef738f4af87d7e50

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
08/06/2024, 21:22

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General

Target

36c694d94e65408b05e8995078b32f08cd93269e8d5b6c43ef738f4af87d7e50.exe
Size

65KB
MD5

f34c59e9842a061d69e4cf7c3376ed6b
SHA1

05945b177f16120c8a1e708aeb3e4c34fb12d4f0
SHA256

36c694d94e65408b05e8995078b32f08cd93269e8d5b6c43ef738f4af87d7e50
SHA512

a4506e556db64874c6b3d2a7106e77bb97cfa91041fc3db6b9f90cc8b754525be9eec2de9ac55362d5613ed023e60e80c3e61939fde682135c373315339f3281
SSDEEP

1536:ECq3yRuqrI01eArdW/O7JnI2e13XiLij40MkTUVqa/Oum:7WNqkOJWmo1HpM0MkTUmum

Score

10^/10

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\\system\\explorer.exe"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Windows\\explorer.exe, c:\\windows\\system\\explorer.exe"	svchost.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-1-5-21-2539840389-1261165778-1087677076-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe

Modifies Installed Components in the registry 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

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

Executes dropped EXE 4 IoCs

pid	Process
3668	explorer.exe
4620	spoolsv.exe
3960	svchost.exe
1020	spoolsv.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\Explorer = "c:\\windows\\system\\explorer.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\system\\svchost.exe RO"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\system\\explorer.exe RO"	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Svchost = "c:\\windows\\system\\svchost.exe RO"	svchost.exe

Drops file in Windows directory 6 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\system\svchost.exe	spoolsv.exe
File opened for modification	\??\c:\windows\system\explorer.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	svchost.exe
File opened for modification	C:\Windows\system\udsys.exe	explorer.exe
File opened for modification	\??\c:\windows\system\explorer.exe	36c694d94e65408b05e8995078b32f08cd93269e8d5b6c43ef738f4af87d7e50.exe
File opened for modification	\??\c:\windows\system\spoolsv.exe	explorer.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1644	36c694d94e65408b05e8995078b32f08cd93269e8d5b6c43ef738f4af87d7e50.exe
1644	36c694d94e65408b05e8995078b32f08cd93269e8d5b6c43ef738f4af87d7e50.exe
3668	explorer.exe
3668	explorer.exe
3668	explorer.exe
3668	explorer.exe
3668	explorer.exe
3668	explorer.exe
3960	svchost.exe
3960	svchost.exe
3960	svchost.exe
3960	svchost.exe
3668	explorer.exe
3668	explorer.exe
3960	svchost.exe
3960	svchost.exe
3668	explorer.exe
3668	explorer.exe
3960	svchost.exe
3960	svchost.exe
3668	explorer.exe
3668	explorer.exe
3960	svchost.exe
3960	svchost.exe
3668	explorer.exe
3668	explorer.exe
3960	svchost.exe
3960	svchost.exe
3668	explorer.exe
3668	explorer.exe
3960	svchost.exe
3960	svchost.exe
3668	explorer.exe
3668	explorer.exe
3960	svchost.exe
3960	svchost.exe
3668	explorer.exe
3668	explorer.exe
3960	svchost.exe
3960	svchost.exe
3668	explorer.exe
3668	explorer.exe
3960	svchost.exe
3960	svchost.exe
3668	explorer.exe
3668	explorer.exe
3960	svchost.exe
3960	svchost.exe
3668	explorer.exe
3668	explorer.exe
3960	svchost.exe
3960	svchost.exe
3668	explorer.exe
3668	explorer.exe
3960	svchost.exe
3960	svchost.exe
3668	explorer.exe
3668	explorer.exe
3960	svchost.exe
3960	svchost.exe
3668	explorer.exe
3668	explorer.exe
3960	svchost.exe
3960	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
3668	explorer.exe
3960	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
1644	36c694d94e65408b05e8995078b32f08cd93269e8d5b6c43ef738f4af87d7e50.exe
1644	36c694d94e65408b05e8995078b32f08cd93269e8d5b6c43ef738f4af87d7e50.exe
3668	explorer.exe
3668	explorer.exe
4620	spoolsv.exe
4620	spoolsv.exe
3960	svchost.exe
3960	svchost.exe
1020	spoolsv.exe
1020	spoolsv.exe
3668	explorer.exe
3668	explorer.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1644 wrote to memory of 3668	1644	36c694d94e65408b05e8995078b32f08cd93269e8d5b6c43ef738f4af87d7e50.exe	80
PID 1644 wrote to memory of 3668	1644	36c694d94e65408b05e8995078b32f08cd93269e8d5b6c43ef738f4af87d7e50.exe	80
PID 1644 wrote to memory of 3668	1644	36c694d94e65408b05e8995078b32f08cd93269e8d5b6c43ef738f4af87d7e50.exe	80
PID 3668 wrote to memory of 4620	3668	explorer.exe	81
PID 3668 wrote to memory of 4620	3668	explorer.exe	81
PID 3668 wrote to memory of 4620	3668	explorer.exe	81
PID 4620 wrote to memory of 3960	4620	spoolsv.exe	82
PID 4620 wrote to memory of 3960	4620	spoolsv.exe	82
PID 4620 wrote to memory of 3960	4620	spoolsv.exe	82
PID 3960 wrote to memory of 1020	3960	svchost.exe	83
PID 3960 wrote to memory of 1020	3960	svchost.exe	83
PID 3960 wrote to memory of 1020	3960	svchost.exe	83
PID 3960 wrote to memory of 1492	3960	svchost.exe	84
PID 3960 wrote to memory of 1492	3960	svchost.exe	84
PID 3960 wrote to memory of 1492	3960	svchost.exe	84
PID 3960 wrote to memory of 1380	3960	svchost.exe	94
PID 3960 wrote to memory of 1380	3960	svchost.exe	94
PID 3960 wrote to memory of 1380	3960	svchost.exe	94
PID 3960 wrote to memory of 3944	3960	svchost.exe	96
PID 3960 wrote to memory of 3944	3960	svchost.exe	96
PID 3960 wrote to memory of 3944	3960	svchost.exe	96

C:\Users\Admin\AppData\Local\Temp\36c694d94e65408b05e8995078b32f08cd93269e8d5b6c43ef738f4af87d7e50.exe
"C:\Users\Admin\AppData\Local\Temp\36c694d94e65408b05e8995078b32f08cd93269e8d5b6c43ef738f4af87d7e50.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1644
- \??\c:\windows\system\explorer.exe
  c:\windows\system\explorer.exe
  2⤵
  - Modifies WinLogon for persistence
  - Modifies visiblity of hidden/system files in Explorer
  - Modifies Installed Components in the registry
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Windows directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3668
- - \??\c:\windows\system\spoolsv.exe
    c:\windows\system\spoolsv.exe SE
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4620
  - - \??\c:\windows\system\svchost.exe
      c:\windows\system\svchost.exe
      4⤵
      Modifies WinLogon for persistence
      Modifies visiblity of hidden/system files in Explorer
      Modifies Installed Components in the registry
      Executes dropped EXE
      Adds Run key to start application
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:3960
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:1020
    - - C:\Windows\SysWOW64\at.exe
        
        at 21:24 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:1492
    - - C:\Windows\SysWOW64\at.exe
        
        at 21:25 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:1380
    - - C:\Windows\SysWOW64\at.exe
        
        at 21:26 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:3944

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

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
65KB

MD5
f519e1ec1d3f0e3750ce04854923f5e4

SHA1
dfe09156b87cb02df5e0296aacd4cd643ee647ff

SHA256
e0d2170d17dfffcc7bd79306bbefb097b86e8ec05108842fc32811cc2df02895

SHA512
7404b9cd081ef2249f84fcbbc97826c35ac32e1b8e1b24892489153f35e57b505ccf440c5cfd0933e8265c5c38e5f3492eb6604a98e0c7e6f3571dc81076bede

Download Submit
C:\Windows\System\explorer.exe

Filesize
65KB

MD5
81df875280196978b2a8bf05306b195e

SHA1
14f65468f29f08c4ce3b2b040d0e43f7ee1fc0ce

SHA256
9c46ca9a5123e71770ba142bd5b4e568a565cdbb9577ed828a43e9c0e6c37e9f

SHA512
d4597af6c2a62741ea6bfd76c6e5957e9dd7b20ffa0bccbed25ba7c14b3d773f47813546963bfdee849044c0c25ffd96efc7ad49486f6b9dbdd8db37d62ba026

Download Submit
C:\Windows\System\spoolsv.exe

Filesize
65KB

MD5
38075ea83aa8dffbdc1e07e0fb5a0038

SHA1
5450d7af0492cdecf5ab8570edc6098cb69df038

SHA256
b6b94d86b5cfd06075280ff609b0086a15fd2a642476f260e86612db9b064c57

SHA512
1ddf4ffd767207fbb6be51d426d67777fef27b7ef8fd4ce616ff316782cf681aff0de63385613db64aa2d85f59cf59b47970dfcf7d119474728a6fb91cfa4284

Download Submit
C:\Windows\System\svchost.exe

Filesize
65KB

MD5
f8b9879475d94ae7a487d77d8bb39eb3

SHA1
b3c5bb5f21f2598294491d03136d551fa61cbf2d

SHA256
e80c4a331919c2f7dd38add723a1874d7b16fe6df1c24af6d045d2d210507a25

SHA512
a2274f3a32d569cfaaaa20d576f3e4cc906f90e2d79db0b329f4a63887e5fa0932ee40c35d148c47906b386e2be48ae45b09ae911ebde4b6a5f5a26265bdf7c0

Download Submit
memory/1020-45-0x0000000074DA0000-0x0000000074EFD000-memory.dmp

Filesize
1.4MB

Download
memory/1020-53-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1644-0-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1644-6-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/1644-56-0x0000000000401000-0x000000000042E000-memory.dmp

Filesize
180KB

Download
memory/1644-55-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1644-3-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/1644-2-0x0000000074DA0000-0x0000000074EFD000-memory.dmp

Filesize
1.4MB

Download
memory/1644-1-0x00000000001C0000-0x00000000001C4000-memory.dmp

Filesize
16KB

Download
memory/3668-14-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3668-17-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3668-15-0x0000000074DA0000-0x0000000074EFD000-memory.dmp

Filesize
1.4MB

Download
memory/3668-13-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3668-58-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3668-69-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3960-38-0x0000000074DA0000-0x0000000074EFD000-memory.dmp

Filesize
1.4MB

Download
memory/3960-42-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/3960-60-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/4620-31-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/4620-27-0x0000000074DA0000-0x0000000074EFD000-memory.dmp

Filesize
1.4MB

Download
memory/4620-26-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download
memory/4620-54-0x0000000000400000-0x0000000000431000-memory.dmp

Filesize
196KB

Download