022728f678d8dcc6cba20147595ed4099e9c98be0582c0f67518d5664e3b8523

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Ransomware\\Annabelle.exe"	Annabelle.exe

Modifies Windows Defender Real-time Protection settings 3 TTPs 2 IoCs

evasion trojan

Modify Registry

Windows Service

Disable or Modify Tools

T1562.001

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	Annabelle.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableRealtimeMonitoring = "1"	Annabelle.exe

UAC bypass 3 TTPs 1 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	Annabelle.exe

Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1070.004

Inhibit System Recovery
T1490

Disables RegEdit via registry modification 2 IoCs

evasion

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	Annabelle.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	Annabelle.exe

Disables Task Manager via registry modification
evasion
Disables use of System Restore points 1 TTPs
evasion

Inhibit System Recovery
T1490

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

Disable or Modify System Firewall

T1562.004

pid	Process
2540	NetSh.exe

Sets file execution options in registry 2 TTPs 64 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\wmplayer.exe\Debugger = "RIP"	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\mpg4dmod.dll\Debugger = "RIP"	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\control.exe\Debugger = "RIP"	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\firefox.exe\Debugger = "RIP"	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\notepad++.exe	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\powershell.exe	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rasman.dll	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\shellstyle.dll\Debugger = "RIP"	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\logoff.exe	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\control.exe	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\notepad++.exe\Debugger = "RIP"	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\MSASCuiL.exe\Debugger = "RIP"	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Autoruns64.exe	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\microsoftedgecp.exe	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\yandex.exe	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\usbui.dll	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\wmplayer.exe	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\shellstyle.dll	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\recoverydrive.exe\Debugger = "RIP"	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\gpedit.msc\Debugger = "RIP"	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\systemexplorer.exe	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\DCIMAN32.exe\Debugger = "RIP"	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\sethc.exe	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\chkdsk.exe	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ksuser.dll\Debugger = "RIP"	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\usbui.dll\Debugger = "RIP"	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\logoff.exe\Debugger = "RIP"	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msconfig.exe\Debugger = "RIP"	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\notepad.exe	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\MSASCuiL.exe	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskkill.exe\Debugger = "RIP"	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\attrib.exe	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\cabinet.dll\Debugger = "RIP"	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\webcheck.dll	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\recoverydrive.exe	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\notepad.exe\Debugger = "RIP"	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\bcdedit.exe\Debugger = "RIP"	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\dllhost.exe\Debugger = "RIP"	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\dllhost.exe	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rundll.exe	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\DBGHELP.exe\Debugger = "RIP"	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\mydocs.dll\Debugger = "RIP"	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rasman.dll\Debugger = "RIP"	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe\Debugger = "RIP"	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\attrib.exe\Debugger = "RIP"	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\mmc.exe\Debugger = "RIP"	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ksuser.dll	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\secpol.msc	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rundll32.exe\Debugger = "RIP"	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\UserAccountControlSettings.exe\Debugger = "RIP"	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\powershell.exe\Debugger = "RIP"	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rundll.exe\Debugger = "RIP"	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskkill.exe	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\sethc.exe\Debugger = "RIP"	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\mspaint.exe	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\webcheck.dll\Debugger = "RIP"	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\cmd.exe\Debugger = "RIP"	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\opera.exe	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\microsoftedge.exe\Debugger = "RIP"	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Autoruns64.exe\Debugger = "RIP"	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Autoruns.exe	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\mspaint.exe\Debugger = "RIP"	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\mpg4dmod.dll	Annabelle.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\UpdateBackup = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Ransomware\\Annabelle.exe"	Annabelle.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Run\UpdateBackup = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Ransomware\\Annabelle.exe"	Annabelle.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\UpdateBackup = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Ransomware\\Annabelle.exe"	Annabelle.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	Annabelle.exe

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

System Information Discovery
T1082

Interacts with shadow copies 2 TTPs 3 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

pid	Process
2148	vssadmin.exe
2256	vssadmin.exe
2952	vssadmin.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeBackupPrivilege	2804	vssvc.exe
Token: SeRestorePrivilege	2804	vssvc.exe
Token: SeAuditPrivilege	2804	vssvc.exe
Token: SeShutdownPrivilege	908	shutdown.exe
Token: SeRemoteShutdownPrivilege	908	shutdown.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2872 wrote to memory of 2148	2872	Annabelle.exe	28
PID 2872 wrote to memory of 2148	2872	Annabelle.exe	28
PID 2872 wrote to memory of 2148	2872	Annabelle.exe	28
PID 2872 wrote to memory of 2256	2872	Annabelle.exe	29
PID 2872 wrote to memory of 2256	2872	Annabelle.exe	29
PID 2872 wrote to memory of 2256	2872	Annabelle.exe	29
PID 2872 wrote to memory of 2952	2872	Annabelle.exe	31
PID 2872 wrote to memory of 2952	2872	Annabelle.exe	31
PID 2872 wrote to memory of 2952	2872	Annabelle.exe	31
PID 2872 wrote to memory of 2540	2872	Annabelle.exe	32
PID 2872 wrote to memory of 2540	2872	Annabelle.exe	32
PID 2872 wrote to memory of 2540	2872	Annabelle.exe	32
PID 2872 wrote to memory of 908	2872	Annabelle.exe	38
PID 2872 wrote to memory of 908	2872	Annabelle.exe	38
PID 2872 wrote to memory of 908	2872	Annabelle.exe	38

System policy modification 1 TTPs 9 IoCs

evasion

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoRun = "1"	Annabelle.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	Annabelle.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\WindowsDefenderMAJ = "1"	Annabelle.exe
Key created	\REGISTRY\MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System	Annabelle.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	Annabelle.exe
Key created	\REGISTRY\MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer	Annabelle.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoControlPanel = "1"	Annabelle.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System	Annabelle.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableTaskMgr = "1"	Annabelle.exe

Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\Ransomware\Annabelle.exe
"C:\Users\Admin\AppData\Local\Temp\Ransomware\Annabelle.exe"
1⤵
- Modifies WinLogon for persistence
- Modifies Windows Defender Real-time Protection settings
- UAC bypass
- Disables RegEdit via registry modification
- Sets file execution options in registry
- Adds Run key to start application
- Checks whether UAC is enabled
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2872
- C:\Windows\system32\vssadmin.exe
  vssadmin delete shadows /all /quiet
  2⤵
  - Interacts with shadow copies
  PID:2148
- C:\Windows\system32\vssadmin.exe
  vssadmin delete shadows /all /quiet
  2⤵
  - Interacts with shadow copies
  PID:2256
- C:\Windows\system32\vssadmin.exe
  vssadmin delete shadows /all /quiet
  2⤵
  - Interacts with shadow copies
  PID:2952
- C:\Windows\system32\NetSh.exe
  NetSh Advfirewall set allprofiles state off
  2⤵
  - Modifies Windows Firewall
  PID:2540
- C:\Windows\System32\shutdown.exe
  "C:\Windows\System32\shutdown.exe" -r -t 00 -f
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:908

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2804

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0
1⤵
PID:1032

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x1
1⤵
PID:1776

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

T1562.001

Indicator Removal

T1070

File Deletion

T1070.004

Modify Registry