formbook | 77bf79df6d50b57cbefcfa784584e8827d5a9d8823b7d5df433f93869ccad0dc

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Oracle\VirtualBox Guest Additions	OtKlDrIky.exe

Looks for VMWare Tools registry key 2 TTPs 1 IoCs

evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\VMware, Inc.\VMware Tools	OtKlDrIky.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

T1082

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

Maps connected drives based on registry 3 TTPs 2 IoCs

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

Query Registry

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	OtKlDrIky.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	OtKlDrIky.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1740 set thread context of 2864	1740	OtKlDrIky.exe	33

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
2856	2864	WerFault.exe	33

System Location Discovery: System Language Discovery 1 TTPs 3 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	OtKlDrIky.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

pid	Process
2016	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1740	OtKlDrIky.exe
1740	OtKlDrIky.exe
1740	OtKlDrIky.exe
1740	OtKlDrIky.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1740	OtKlDrIky.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1740 wrote to memory of 2016	1740	OtKlDrIky.exe	31
PID 1740 wrote to memory of 2016	1740	OtKlDrIky.exe	31
PID 1740 wrote to memory of 2016	1740	OtKlDrIky.exe	31
PID 1740 wrote to memory of 2016	1740	OtKlDrIky.exe	31
PID 1740 wrote to memory of 2864	1740	OtKlDrIky.exe	33
PID 1740 wrote to memory of 2864	1740	OtKlDrIky.exe	33
PID 1740 wrote to memory of 2864	1740	OtKlDrIky.exe	33
PID 1740 wrote to memory of 2864	1740	OtKlDrIky.exe	33
PID 1740 wrote to memory of 2864	1740	OtKlDrIky.exe	33
PID 1740 wrote to memory of 2864	1740	OtKlDrIky.exe	33
PID 1740 wrote to memory of 2864	1740	OtKlDrIky.exe	33
PID 1740 wrote to memory of 2864	1740	OtKlDrIky.exe	33
PID 1740 wrote to memory of 2864	1740	OtKlDrIky.exe	33
PID 1740 wrote to memory of 2864	1740	OtKlDrIky.exe	33
PID 2864 wrote to memory of 2856	2864	RegSvcs.exe	34
PID 2864 wrote to memory of 2856	2864	RegSvcs.exe	34
PID 2864 wrote to memory of 2856	2864	RegSvcs.exe	34
PID 2864 wrote to memory of 2856	2864	RegSvcs.exe	34

C:\Users\Admin\AppData\Local\Temp\OtKlDrIky.exe
"C:\Users\Admin\AppData\Local\Temp\OtKlDrIky.exe"
1⤵
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1740
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OtKlDrIky" /XML "C:\Users\Admin\AppData\Local\Temp\tmp45C7.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2016
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "{path}"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2864
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2864 -s 36
    3⤵
    - Program crash
    PID:2856

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

Persistence

Scheduled Task/Job

T1053

Scheduled Task

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

Virtualization/Sandbox Evasion

2

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

2