privateloader | a763709cacb29bab169bea58709364f138c92fa4fa86bae2bc2524cff4637f50

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	file.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	IEUpdater1.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\SystemBiosVersion	file.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	file.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	IEUpdater1.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	IEUpdater1.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-1-5-21-1067295379-1486014338-1703171060-1000\Control Panel\International\Geo\Nation	file.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FANBooster1.lnk	file.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\OperaConnect1.lnk	file.exe

Executes dropped EXE 1 IoCs

pid	Process
4300	IEUpdater1.exe

Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Themida packer 27 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/5044-0-0x0000000000EF0000-0x0000000002123000-memory.dmp	themida
behavioral2/memory/5044-1-0x0000000000EF0000-0x0000000002123000-memory.dmp	themida
behavioral2/memory/5044-13-0x0000000000EF0000-0x0000000002123000-memory.dmp	themida
behavioral2/memory/5044-14-0x0000000000EF0000-0x0000000002123000-memory.dmp	themida
behavioral2/memory/5044-15-0x0000000000EF0000-0x0000000002123000-memory.dmp	themida
behavioral2/memory/5044-16-0x0000000000EF0000-0x0000000002123000-memory.dmp	themida
behavioral2/memory/5044-17-0x0000000000EF0000-0x0000000002123000-memory.dmp	themida
behavioral2/files/0x00080000000231e9-23.dat	themida
behavioral2/memory/5044-25-0x0000000000EF0000-0x0000000002123000-memory.dmp	themida
behavioral2/memory/5044-26-0x0000000000EF0000-0x0000000002123000-memory.dmp	themida
behavioral2/memory/5044-98-0x0000000000EF0000-0x0000000002123000-memory.dmp	themida
behavioral2/files/0x00080000000231f6-111.dat	themida
behavioral2/files/0x00080000000231f6-112.dat	themida
behavioral2/memory/4300-115-0x00000000001B0000-0x00000000013E3000-memory.dmp	themida
behavioral2/memory/4300-116-0x00000000001B0000-0x00000000013E3000-memory.dmp	themida
behavioral2/memory/5044-126-0x0000000000EF0000-0x0000000002123000-memory.dmp	themida
behavioral2/memory/4300-131-0x00000000001B0000-0x00000000013E3000-memory.dmp	themida
behavioral2/memory/4300-134-0x00000000001B0000-0x00000000013E3000-memory.dmp	themida
behavioral2/memory/4300-135-0x00000000001B0000-0x00000000013E3000-memory.dmp	themida
behavioral2/memory/4300-136-0x00000000001B0000-0x00000000013E3000-memory.dmp	themida
behavioral2/memory/4300-137-0x00000000001B0000-0x00000000013E3000-memory.dmp	themida
behavioral2/memory/4300-138-0x00000000001B0000-0x00000000013E3000-memory.dmp	themida
behavioral2/files/0x00080000000231e6-140.dat	themida
behavioral2/files/0x00060000000231ed-139.dat	themida
behavioral2/files/0x00080000000231e9-142.dat	themida
behavioral2/memory/4300-149-0x00000000001B0000-0x00000000013E3000-memory.dmp	themida
behavioral2/memory/4300-151-0x00000000001B0000-0x00000000013E3000-memory.dmp	themida

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1067295379-1486014338-1703171060-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	file.exe
Key opened	\REGISTRY\USER\S-1-5-21-1067295379-1486014338-1703171060-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	file.exe
Key opened	\REGISTRY\USER\S-1-5-21-1067295379-1486014338-1703171060-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	file.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1067295379-1486014338-1703171060-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MaxLoonaFest1 = "C:\\Users\\Admin\\AppData\\Local\\MaxLoonaFest1\\MaxLoonaFest1.exe"	file.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1067295379-1486014338-1703171060-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\LegalHelper1 = "C:\\Users\\Admin\\AppData\\Local\\LegalHelper1\\LegalHelper1.exe"	file.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

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	file.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	IEUpdater1.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
19	ipinfo.io
20	ipinfo.io

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
5044	file.exe
4300	IEUpdater1.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2156	5044	WerFault.exe	81

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	file.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	file.exe

Creates scheduled task(s) 1 TTPs 4 IoCs

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

persistence

Scheduled Task/Job

pid	Process
1140	schtasks.exe
4004	schtasks.exe
1016	schtasks.exe
2592	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5044	file.exe
5044	file.exe
5044	file.exe
5044	file.exe
4300	IEUpdater1.exe
4300	IEUpdater1.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 5044 wrote to memory of 1140	5044	file.exe	84
PID 5044 wrote to memory of 1140	5044	file.exe	84
PID 5044 wrote to memory of 1140	5044	file.exe	84
PID 5044 wrote to memory of 4004	5044	file.exe	86
PID 5044 wrote to memory of 4004	5044	file.exe	86
PID 5044 wrote to memory of 4004	5044	file.exe	86
PID 5044 wrote to memory of 1016	5044	file.exe	88
PID 5044 wrote to memory of 1016	5044	file.exe	88
PID 5044 wrote to memory of 1016	5044	file.exe	88
PID 5044 wrote to memory of 2592	5044	file.exe	90
PID 5044 wrote to memory of 2592	5044	file.exe	90
PID 5044 wrote to memory of 2592	5044	file.exe	90
PID 5044 wrote to memory of 4300	5044	file.exe	92
PID 5044 wrote to memory of 4300	5044	file.exe	92
PID 5044 wrote to memory of 4300	5044	file.exe	92

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1067295379-1486014338-1703171060-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	file.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1067295379-1486014338-1703171060-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	file.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks computer location settings
- Drops startup file
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:5044
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /create /f /RU "Admin" /tr "C:\ProgramData\OfficeTrackerNMP1\OfficeTrackerNMP1.exe" /tn "OfficeTrackerNMP1 HR" /sc HOURLY /rl HIGHEST
  2⤵
  - Creates scheduled task(s)
  PID:1140
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /create /f /RU "Admin" /tr "C:\ProgramData\OfficeTrackerNMP1\OfficeTrackerNMP1.exe" /tn "OfficeTrackerNMP1 LG" /sc ONLOGON /rl HIGHEST
  2⤵
  - Creates scheduled task(s)
  PID:4004
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /create /f /RU "Admin" /tr "C:\ProgramData\IEUpdater1\IEUpdater1.exe" /tn "IEUpdater1 HR" /sc HOURLY /rl HIGHEST
  2⤵
  - Creates scheduled task(s)
  PID:1016
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /create /f /RU "Admin" /tr "C:\ProgramData\IEUpdater1\IEUpdater1.exe" /tn "IEUpdater1 LG" /sc ONLOGON /rl HIGHEST
  2⤵
  - Creates scheduled task(s)
  PID:2592
- C:\ProgramData\IEUpdater1\IEUpdater1.exe
  "C:\ProgramData\IEUpdater1\IEUpdater1.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
  - Suspicious behavior: EnumeratesProcesses
  PID:4300
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5044 -s 1968
  2⤵
  - Program crash
  PID:2156

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 5044 -ip 5044
1⤵
PID:4148

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

Defense Evasion

Modify Registry

T1112

Virtualization/Sandbox Evasion

T1497

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

System Information Discovery