d71e6536f07cb4e40237cf7132dd01b9d93ee06c07767f108cc1929f1f5b5b9c

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	D9A30725D248756DD74BADB45D1B3171.exe

Checks BIOS information in registry 2 TTPs 2 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	D9A30725D248756DD74BADB45D1B3171.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	D9A30725D248756DD74BADB45D1B3171.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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	D9A30725D248756DD74BADB45D1B3171.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PowerExpertNNT.lnk	D9A30725D248756DD74BADB45D1B3171.exe

Executes dropped EXE 1 IoCs

pid	Process
1144	D9A30725D248756DD74BADB45D1B3171.exe

Themida packer 9 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/files/0x000e000000023393-17.dat	themida
behavioral2/memory/1144-23-0x0000000000CF0000-0x00000000017CB000-memory.dmp	themida
behavioral2/memory/1144-32-0x0000000000CF0000-0x00000000017CB000-memory.dmp	themida
behavioral2/memory/1144-30-0x0000000000CF0000-0x00000000017CB000-memory.dmp	themida
behavioral2/memory/1144-31-0x0000000000CF0000-0x00000000017CB000-memory.dmp	themida
behavioral2/memory/1144-33-0x0000000000CF0000-0x00000000017CB000-memory.dmp	themida
behavioral2/memory/1144-34-0x0000000000CF0000-0x00000000017CB000-memory.dmp	themida
behavioral2/memory/1144-35-0x0000000000CF0000-0x00000000017CB000-memory.dmp	themida
behavioral2/memory/1144-42-0x0000000000CF0000-0x00000000017CB000-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-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ExtreamFanV6 = "C:\\Users\\Admin\\AppData\\Local\\ExtreamFanV6\\ExtreamFanV6.exe"	D9A30725D248756DD74BADB45D1B3171.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	D9A30725D248756DD74BADB45D1B3171.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
1144	D9A30725D248756DD74BADB45D1B3171.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	D9A30725D248756DD74BADB45D1B3171.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	D9A30725D248756DD74BADB45D1B3171.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
544	schtasks.exe
1732	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1144	D9A30725D248756DD74BADB45D1B3171.exe
1144	D9A30725D248756DD74BADB45D1B3171.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
4644	D9A30725D248756DD74BADB45D1B3171.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4644 wrote to memory of 544	4644	D9A30725D248756DD74BADB45D1B3171.exe	85
PID 4644 wrote to memory of 544	4644	D9A30725D248756DD74BADB45D1B3171.exe	85
PID 4644 wrote to memory of 544	4644	D9A30725D248756DD74BADB45D1B3171.exe	85
PID 4644 wrote to memory of 1732	4644	D9A30725D248756DD74BADB45D1B3171.exe	87
PID 4644 wrote to memory of 1732	4644	D9A30725D248756DD74BADB45D1B3171.exe	87
PID 4644 wrote to memory of 1732	4644	D9A30725D248756DD74BADB45D1B3171.exe	87
PID 4644 wrote to memory of 1144	4644	D9A30725D248756DD74BADB45D1B3171.exe	93
PID 4644 wrote to memory of 1144	4644	D9A30725D248756DD74BADB45D1B3171.exe	93
PID 4644 wrote to memory of 1144	4644	D9A30725D248756DD74BADB45D1B3171.exe	93

C:\Users\Admin\AppData\Local\Temp\D9A30725D248756DD74BADB45D1B3171.exe
"C:\Users\Admin\AppData\Local\Temp\D9A30725D248756DD74BADB45D1B3171.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
PID:4644
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /create /f /RU "Admin" /tr "C:\ProgramData\jewkkwnf\jewkkwnf.exe" /tn "jewkkwnf HR" /sc HOURLY /rl HIGHEST
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:544
- C:\Windows\SysWOW64\schtasks.exe
  schtasks /create /f /RU "Admin" /tr "C:\ProgramData\jewkkwnf\jewkkwnf.exe" /tn "jewkkwnf LG" /sc ONLOGON /rl HIGHEST
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1732
- C:\Users\Admin\AppData\Local\Temp\D9A30725D248756DD74BADB45D1B3171.exe
  "C:\Users\Admin\AppData\Local\Temp\D9A30725D248756DD74BADB45D1B3171.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:1144

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

T1112

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

System Information Discovery