470d36a8b40c2d17fb62d16cb1e4e8786f0c77c625577fa57c31563b8838f9de

Processes:

explorer.exesvchost.exe

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

Processes:

svchost.exeexplorer.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\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

Modify Registry

Processes:

svchost.exeexplorer.exe

description	ioc	process
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
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

Executes dropped EXE 4 IoCs

Processes:

explorer.exespoolsv.exesvchost.exespoolsv.exe

pid process

2080 explorer.exe
2628 spoolsv.exe
2532 svchost.exe
2672 spoolsv.exe

pid	process
2080	explorer.exe
2628	spoolsv.exe
2532	svchost.exe
2672	spoolsv.exe

Loads dropped DLL 8 IoCs

Processes:

470d36a8b40c2d17fb62d16cb1e4e8786f0c77c625577fa57c31563b8838f9de.exeexplorer.exespoolsv.exesvchost.exe

pid	process
1244	470d36a8b40c2d17fb62d16cb1e4e8786f0c77c625577fa57c31563b8838f9de.exe
1244	470d36a8b40c2d17fb62d16cb1e4e8786f0c77c625577fa57c31563b8838f9de.exe
2080	explorer.exe
2080	explorer.exe
2628	spoolsv.exe
2628	spoolsv.exe
2532	svchost.exe
2532	svchost.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

Processes:

explorer.exesvchost.exe

description	ioc	process
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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Explorer = "c:\\windows\\system\\explorer.exe RO"	explorer.exe

Drops file in Windows directory 6 IoCs

Processes:

explorer.exesvchost.exe470d36a8b40c2d17fb62d16cb1e4e8786f0c77c625577fa57c31563b8838f9de.exespoolsv.exe

description	ioc	process
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	470d36a8b40c2d17fb62d16cb1e4e8786f0c77c625577fa57c31563b8838f9de.exe
File opened for modification	\??\c:\windows\system\spoolsv.exe	explorer.exe
File opened for modification	\??\c:\windows\system\svchost.exe	spoolsv.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

Processes:

470d36a8b40c2d17fb62d16cb1e4e8786f0c77c625577fa57c31563b8838f9de.exeexplorer.exesvchost.exe

pid	process
1244	470d36a8b40c2d17fb62d16cb1e4e8786f0c77c625577fa57c31563b8838f9de.exe
2080	explorer.exe
2080	explorer.exe
2080	explorer.exe
2532	svchost.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe
2080	explorer.exe
2532	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

Processes:

explorer.exesvchost.exe

pid process

2080 explorer.exe
2532 svchost.exe

pid	process
2080	explorer.exe
2532	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

470d36a8b40c2d17fb62d16cb1e4e8786f0c77c625577fa57c31563b8838f9de.exeexplorer.exespoolsv.exesvchost.exespoolsv.exe

pid	process
1244	470d36a8b40c2d17fb62d16cb1e4e8786f0c77c625577fa57c31563b8838f9de.exe
1244	470d36a8b40c2d17fb62d16cb1e4e8786f0c77c625577fa57c31563b8838f9de.exe
2080	explorer.exe
2080	explorer.exe
2628	spoolsv.exe
2628	spoolsv.exe
2532	svchost.exe
2532	svchost.exe
2672	spoolsv.exe
2672	spoolsv.exe
2080	explorer.exe
2080	explorer.exe

Suspicious use of WriteProcessMemory 28 IoCs

Processes:

470d36a8b40c2d17fb62d16cb1e4e8786f0c77c625577fa57c31563b8838f9de.exeexplorer.exespoolsv.exesvchost.exe

description	pid	process	target process
PID 1244 wrote to memory of 2080	1244	470d36a8b40c2d17fb62d16cb1e4e8786f0c77c625577fa57c31563b8838f9de.exe	explorer.exe
PID 1244 wrote to memory of 2080	1244	470d36a8b40c2d17fb62d16cb1e4e8786f0c77c625577fa57c31563b8838f9de.exe	explorer.exe
PID 1244 wrote to memory of 2080	1244	470d36a8b40c2d17fb62d16cb1e4e8786f0c77c625577fa57c31563b8838f9de.exe	explorer.exe
PID 1244 wrote to memory of 2080	1244	470d36a8b40c2d17fb62d16cb1e4e8786f0c77c625577fa57c31563b8838f9de.exe	explorer.exe
PID 2080 wrote to memory of 2628	2080	explorer.exe	spoolsv.exe
PID 2080 wrote to memory of 2628	2080	explorer.exe	spoolsv.exe
PID 2080 wrote to memory of 2628	2080	explorer.exe	spoolsv.exe
PID 2080 wrote to memory of 2628	2080	explorer.exe	spoolsv.exe
PID 2628 wrote to memory of 2532	2628	spoolsv.exe	svchost.exe
PID 2628 wrote to memory of 2532	2628	spoolsv.exe	svchost.exe
PID 2628 wrote to memory of 2532	2628	spoolsv.exe	svchost.exe
PID 2628 wrote to memory of 2532	2628	spoolsv.exe	svchost.exe
PID 2532 wrote to memory of 2672	2532	svchost.exe	spoolsv.exe
PID 2532 wrote to memory of 2672	2532	svchost.exe	spoolsv.exe
PID 2532 wrote to memory of 2672	2532	svchost.exe	spoolsv.exe
PID 2532 wrote to memory of 2672	2532	svchost.exe	spoolsv.exe
PID 2532 wrote to memory of 2908	2532	svchost.exe	at.exe
PID 2532 wrote to memory of 2908	2532	svchost.exe	at.exe
PID 2532 wrote to memory of 2908	2532	svchost.exe	at.exe
PID 2532 wrote to memory of 2908	2532	svchost.exe	at.exe
PID 2532 wrote to memory of 2880	2532	svchost.exe	at.exe
PID 2532 wrote to memory of 2880	2532	svchost.exe	at.exe
PID 2532 wrote to memory of 2880	2532	svchost.exe	at.exe
PID 2532 wrote to memory of 2880	2532	svchost.exe	at.exe
PID 2532 wrote to memory of 304	2532	svchost.exe	at.exe
PID 2532 wrote to memory of 304	2532	svchost.exe	at.exe
PID 2532 wrote to memory of 304	2532	svchost.exe	at.exe
PID 2532 wrote to memory of 304	2532	svchost.exe	at.exe

C:\Users\Admin\AppData\Local\Temp\470d36a8b40c2d17fb62d16cb1e4e8786f0c77c625577fa57c31563b8838f9de.exe
"C:\Users\Admin\AppData\Local\Temp\470d36a8b40c2d17fb62d16cb1e4e8786f0c77c625577fa57c31563b8838f9de.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1244
- \??\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
  - Loads dropped DLL
  - 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:2080
- - \??\c:\windows\system\spoolsv.exe
    c:\windows\system\spoolsv.exe SE
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Drops file in Windows directory
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2628
  - - \??\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
      Loads dropped DLL
      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:2532
    - - \??\c:\windows\system\spoolsv.exe
        
        c:\windows\system\spoolsv.exe PR
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:2672
    - - C:\Windows\SysWOW64\at.exe
        
        at 22:04 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:2908
    - - C:\Windows\SysWOW64\at.exe
        
        at 22:05 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:2880
    - - C:\Windows\SysWOW64\at.exe
        
        at 22:06 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
        5⤵
        
        PID:304

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

3

T1547

Registry Run Keys / Startup Folder

2

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

3

T1547

Registry Run Keys / Startup Folder

2

Winlogon Helper DLL

T1547.004

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

System Information Discovery