d7872c553974f4dbde417da646b2ad4b170deb805e29547993362f324846e908

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:

explorer.exesvchost.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	svchost.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
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
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

Executes dropped EXE 4 IoCs

Processes:

explorer.exespoolsv.exesvchost.exespoolsv.exe

pid process

2528 explorer.exe
2524 spoolsv.exe
2456 svchost.exe
1976 spoolsv.exe

pid	process
2528	explorer.exe
2524	spoolsv.exe
2456	svchost.exe
1976	spoolsv.exe

Loads dropped DLL 8 IoCs

Processes:

d7872c553974f4dbde417da646b2ad4b170deb805e29547993362f324846e908.exeexplorer.exespoolsv.exesvchost.exe

pid	process
3048	d7872c553974f4dbde417da646b2ad4b170deb805e29547993362f324846e908.exe
3048	d7872c553974f4dbde417da646b2ad4b170deb805e29547993362f324846e908.exe
2528	explorer.exe
2528	explorer.exe
2524	spoolsv.exe
2524	spoolsv.exe
2456	svchost.exe
2456	svchost.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

Processes:

svchost.exeexplorer.exe

description	ioc	process
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
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

Drops file in Windows directory 6 IoCs

Processes:

explorer.exesvchost.exed7872c553974f4dbde417da646b2ad4b170deb805e29547993362f324846e908.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	d7872c553974f4dbde417da646b2ad4b170deb805e29547993362f324846e908.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:

d7872c553974f4dbde417da646b2ad4b170deb805e29547993362f324846e908.exeexplorer.exesvchost.exe

pid	process
3048	d7872c553974f4dbde417da646b2ad4b170deb805e29547993362f324846e908.exe
2528	explorer.exe
2528	explorer.exe
2528	explorer.exe
2528	explorer.exe
2528	explorer.exe
2456	svchost.exe
2456	svchost.exe
2528	explorer.exe
2456	svchost.exe
2528	explorer.exe
2456	svchost.exe
2528	explorer.exe
2528	explorer.exe
2456	svchost.exe
2456	svchost.exe
2528	explorer.exe
2456	svchost.exe
2528	explorer.exe
2528	explorer.exe
2456	svchost.exe
2456	svchost.exe
2528	explorer.exe
2456	svchost.exe
2528	explorer.exe
2528	explorer.exe
2456	svchost.exe
2528	explorer.exe
2456	svchost.exe
2528	explorer.exe
2456	svchost.exe
2528	explorer.exe
2456	svchost.exe
2528	explorer.exe
2456	svchost.exe
2456	svchost.exe
2528	explorer.exe
2456	svchost.exe
2528	explorer.exe
2528	explorer.exe
2456	svchost.exe
2528	explorer.exe
2456	svchost.exe
2456	svchost.exe
2528	explorer.exe
2528	explorer.exe
2456	svchost.exe
2456	svchost.exe
2528	explorer.exe
2456	svchost.exe
2528	explorer.exe
2528	explorer.exe
2456	svchost.exe
2456	svchost.exe
2528	explorer.exe
2528	explorer.exe
2456	svchost.exe
2456	svchost.exe
2528	explorer.exe
2528	explorer.exe
2456	svchost.exe
2528	explorer.exe
2456	svchost.exe
2456	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

Processes:

explorer.exesvchost.exe

pid process

2528 explorer.exe
2456 svchost.exe

pid	process
2528	explorer.exe
2456	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

d7872c553974f4dbde417da646b2ad4b170deb805e29547993362f324846e908.exeexplorer.exespoolsv.exesvchost.exespoolsv.exe

pid	process
3048	d7872c553974f4dbde417da646b2ad4b170deb805e29547993362f324846e908.exe
3048	d7872c553974f4dbde417da646b2ad4b170deb805e29547993362f324846e908.exe
2528	explorer.exe
2528	explorer.exe
2524	spoolsv.exe
2524	spoolsv.exe
2456	svchost.exe
2456	svchost.exe
1976	spoolsv.exe
1976	spoolsv.exe
2528	explorer.exe
2528	explorer.exe

Suspicious use of WriteProcessMemory 28 IoCs

Processes:

d7872c553974f4dbde417da646b2ad4b170deb805e29547993362f324846e908.exeexplorer.exespoolsv.exesvchost.exe

description	pid	process	target process
PID 3048 wrote to memory of 2528	3048	d7872c553974f4dbde417da646b2ad4b170deb805e29547993362f324846e908.exe	explorer.exe
PID 3048 wrote to memory of 2528	3048	d7872c553974f4dbde417da646b2ad4b170deb805e29547993362f324846e908.exe	explorer.exe
PID 3048 wrote to memory of 2528	3048	d7872c553974f4dbde417da646b2ad4b170deb805e29547993362f324846e908.exe	explorer.exe
PID 3048 wrote to memory of 2528	3048	d7872c553974f4dbde417da646b2ad4b170deb805e29547993362f324846e908.exe	explorer.exe
PID 2528 wrote to memory of 2524	2528	explorer.exe	spoolsv.exe
PID 2528 wrote to memory of 2524	2528	explorer.exe	spoolsv.exe
PID 2528 wrote to memory of 2524	2528	explorer.exe	spoolsv.exe
PID 2528 wrote to memory of 2524	2528	explorer.exe	spoolsv.exe
PID 2524 wrote to memory of 2456	2524	spoolsv.exe	svchost.exe
PID 2524 wrote to memory of 2456	2524	spoolsv.exe	svchost.exe
PID 2524 wrote to memory of 2456	2524	spoolsv.exe	svchost.exe
PID 2524 wrote to memory of 2456	2524	spoolsv.exe	svchost.exe
PID 2456 wrote to memory of 1976	2456	svchost.exe	spoolsv.exe
PID 2456 wrote to memory of 1976	2456	svchost.exe	spoolsv.exe
PID 2456 wrote to memory of 1976	2456	svchost.exe	spoolsv.exe
PID 2456 wrote to memory of 1976	2456	svchost.exe	spoolsv.exe
PID 2456 wrote to memory of 2044	2456	svchost.exe	at.exe
PID 2456 wrote to memory of 2044	2456	svchost.exe	at.exe
PID 2456 wrote to memory of 2044	2456	svchost.exe	at.exe
PID 2456 wrote to memory of 2044	2456	svchost.exe	at.exe
PID 2456 wrote to memory of 2632	2456	svchost.exe	at.exe
PID 2456 wrote to memory of 2632	2456	svchost.exe	at.exe
PID 2456 wrote to memory of 2632	2456	svchost.exe	at.exe
PID 2456 wrote to memory of 2632	2456	svchost.exe	at.exe
PID 2456 wrote to memory of 2288	2456	svchost.exe	at.exe
PID 2456 wrote to memory of 2288	2456	svchost.exe	at.exe
PID 2456 wrote to memory of 2288	2456	svchost.exe	at.exe
PID 2456 wrote to memory of 2288	2456	svchost.exe	at.exe

C:\Users\Admin\AppData\Local\Temp\d7872c553974f4dbde417da646b2ad4b170deb805e29547993362f324846e908.exe
"C:\Users\Admin\AppData\Local\Temp\d7872c553974f4dbde417da646b2ad4b170deb805e29547993362f324846e908.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3048

\??\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:2528

\??\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:2524

\??\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:2456

\??\c:\windows\system\spoolsv.exe
c:\windows\system\spoolsv.exe PR
5⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:1976

C:\Windows\SysWOW64\at.exe
at 03:59 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
5⤵
PID:2044

C:\Windows\SysWOW64\at.exe
at 04:00 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
5⤵
PID:2632

C:\Windows\SysWOW64\at.exe
at 04:01 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe
5⤵
PID:2288

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