privateloader | 27836c4dd6f897064edfb77d782735115be6316f4718599c2ac221a1ac8fa771

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe

Checks BIOS information in registry 2 TTPs 4 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000\Control Panel\International\Geo\Nation	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PowerExpertNT.lnk	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe

Executes dropped EXE 1 IoCs

pid	Process
2792	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe

Themida packer 19 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/1960-0-0x0000000000C70000-0x0000000001524000-memory.dmp	themida
behavioral2/memory/1960-7-0x0000000000C70000-0x0000000001524000-memory.dmp	themida
behavioral2/memory/1960-8-0x0000000000C70000-0x0000000001524000-memory.dmp	themida
behavioral2/memory/1960-9-0x0000000000C70000-0x0000000001524000-memory.dmp	themida
behavioral2/memory/1960-10-0x0000000000C70000-0x0000000001524000-memory.dmp	themida
behavioral2/memory/1960-11-0x0000000000C70000-0x0000000001524000-memory.dmp	themida
behavioral2/memory/1960-12-0x0000000000C70000-0x0000000001524000-memory.dmp	themida
behavioral2/files/0x00070000000234e8-18.dat	themida
behavioral2/memory/1960-19-0x0000000000C70000-0x0000000001524000-memory.dmp	themida
behavioral2/files/0x00070000000234ed-31.dat	themida
behavioral2/memory/1960-36-0x0000000000C70000-0x0000000001524000-memory.dmp	themida
behavioral2/memory/2792-38-0x0000000000190000-0x0000000000F83000-memory.dmp	themida
behavioral2/memory/2792-43-0x0000000000190000-0x0000000000F83000-memory.dmp	themida
behavioral2/memory/2792-45-0x0000000000190000-0x0000000000F83000-memory.dmp	themida
behavioral2/memory/2792-46-0x0000000000190000-0x0000000000F83000-memory.dmp	themida
behavioral2/memory/2792-44-0x0000000000190000-0x0000000000F83000-memory.dmp	themida
behavioral2/memory/2792-47-0x0000000000190000-0x0000000000F83000-memory.dmp	themida
behavioral2/memory/2792-54-0x0000000000190000-0x0000000000F83000-memory.dmp	themida
behavioral2/memory/2792-56-0x0000000000190000-0x0000000000F83000-memory.dmp	themida

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ExtreamFanV5 = "C:\\Users\\Admin\\AppData\\Local\\ExtreamFanV5\\ExtreamFanV5.exe"	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1960	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe
2792	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.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 4 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	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Modifies Internet Explorer settings 1 TTPs 2 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000\SOFTWARE\Microsoft\Internet Explorer\GPU	SearchApp.exe
Key created	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000\Software\Microsoft\Internet Explorer\GPU	SearchApp.exe

Modifies registry class 21 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\SOFTWARE\Microsoft\Speech_OneCore\Isolated\ohDO1Sgy3MzgdEgEb4WYfDS4eik	SearchApp.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Settings\Cache\Content\CachePrefix	SearchApp.exe
Key created	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\EdpDomStorage\microsoft.windows.search	SearchApp.exe
Key created	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\EdpDomStorage\windows.search	SearchApp.exe
Key created	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\Total	SearchApp.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\microsoft.windows.search\ = "56"	SearchApp.exe
Key created	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\MuiCache	SearchApp.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\SOFTWARE\Microsoft\Speech_OneCore\Isolated\ohDO1Sgy3MzgdEgEb4WYfDS4eik = "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Speech_OneCore\\Recognizers\\Tokens\\MS-1033-110-WINMO-DNN"	SearchApp.exe
Key created	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DomStorageState	SearchApp.exe
Key created	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\microsoft.windows.search	SearchApp.exe
Key created	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\windows.search	SearchApp.exe
Key created	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\EdpDomStorage\Total	SearchApp.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\windows.search\Total = "56"	SearchApp.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\microsoft.windows.search\ = "23"	SearchApp.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\windows.search\Total = "23"	SearchApp.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\Total\ = "185"	SearchApp.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Settings\Cache\Cookies\CachePrefix = "Cookie:"	SearchApp.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Settings\Cache\History\CachePrefix = "Visited:"	SearchApp.exe
Key created	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage	SearchApp.exe
Key created	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\EdpDomStorage	SearchApp.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.search_cw5n1h2txyewy\Internet Explorer\DOMStorage\Total\ = "152"	SearchApp.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

pid	Process
4288	schtasks.exe
1836	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1960	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe
1960	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe
2792	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe
2792	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
1960	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
264	SearchApp.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1960 wrote to memory of 4288	1960	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe	87
PID 1960 wrote to memory of 4288	1960	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe	87
PID 1960 wrote to memory of 4288	1960	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe	87
PID 1960 wrote to memory of 1836	1960	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe	89
PID 1960 wrote to memory of 1836	1960	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe	89
PID 1960 wrote to memory of 1836	1960	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe	89
PID 1960 wrote to memory of 2792	1960	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe	96
PID 1960 wrote to memory of 2792	1960	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe	96
PID 1960 wrote to memory of 2792	1960	fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe	96

C:\Users\Admin\AppData\Local\Temp\fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe
"C:\Users\Admin\AppData\Local\Temp\fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:1960
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /create /f /RU "Admin" /tr "C:\ProgramData\WinTrackerSP\WinTrackerSP.exe" /tn "WinTrackerSP HR" /sc HOURLY /rl HIGHEST
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4288
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /create /f /RU "Admin" /tr "C:\ProgramData\WinTrackerSP\WinTrackerSP.exe" /tn "WinTrackerSP LG" /sc ONLOGON /rl HIGHEST
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1836
- C:\Users\Admin\AppData\Local\Temp\fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe
  "C:\Users\Admin\AppData\Local\Temp\fee76384c8607145aea5e8e60f00feebe357e404202460c5a0bdb01718bc1db7.exe"
  2⤵
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Checks whether UAC is enabled
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2792

C:\Windows\system32\werfault.exe
werfault.exe /hc /shared Global\9a0e28b0051042a7bc58dcf8d43ad48c /t 1540 /p 780
1⤵
PID:1452

C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
"C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
1⤵
- Modifies Internet Explorer settings
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:264

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

Modify Registry

2

T1112

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

3

System Information Discovery

4

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion