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

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

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-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	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

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 3 IoCs

description	pid	Process	procid_target
PID 2496 set thread context of 1052	2496	OtKlDrIky.exe	102
PID 1052 set thread context of 3420	1052	RegSvcs.exe	56
PID 2292 set thread context of 3420	2292	cscript.exe	56

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	OtKlDrIky.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cscript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
652	schtasks.exe

Suspicious behavior: EnumeratesProcesses 50 IoCs

pid	Process
2496	OtKlDrIky.exe
2496	OtKlDrIky.exe
2496	OtKlDrIky.exe
2496	OtKlDrIky.exe
1052	RegSvcs.exe
1052	RegSvcs.exe
1052	RegSvcs.exe
1052	RegSvcs.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe
2292	cscript.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
1052	RegSvcs.exe
1052	RegSvcs.exe
1052	RegSvcs.exe
2292	cscript.exe
2292	cscript.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2496	OtKlDrIky.exe
Token: SeDebugPrivilege	1052	RegSvcs.exe
Token: SeDebugPrivilege	2292	cscript.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2496 wrote to memory of 652	2496	OtKlDrIky.exe	100
PID 2496 wrote to memory of 652	2496	OtKlDrIky.exe	100
PID 2496 wrote to memory of 652	2496	OtKlDrIky.exe	100
PID 2496 wrote to memory of 1052	2496	OtKlDrIky.exe	102
PID 2496 wrote to memory of 1052	2496	OtKlDrIky.exe	102
PID 2496 wrote to memory of 1052	2496	OtKlDrIky.exe	102
PID 2496 wrote to memory of 1052	2496	OtKlDrIky.exe	102
PID 2496 wrote to memory of 1052	2496	OtKlDrIky.exe	102
PID 2496 wrote to memory of 1052	2496	OtKlDrIky.exe	102
PID 3420 wrote to memory of 2292	3420	Explorer.EXE	103
PID 3420 wrote to memory of 2292	3420	Explorer.EXE	103
PID 3420 wrote to memory of 2292	3420	Explorer.EXE	103
PID 2292 wrote to memory of 3872	2292	cscript.exe	104
PID 2292 wrote to memory of 3872	2292	cscript.exe	104
PID 2292 wrote to memory of 3872	2292	cscript.exe	104

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:3420
- C:\Users\Admin\AppData\Local\Temp\OtKlDrIky.exe
  "C:\Users\Admin\AppData\Local\Temp\OtKlDrIky.exe"
  2⤵
  - Looks for VirtualBox Guest Additions in registry
  - Looks for VMWare Tools registry key
  - Checks BIOS information in registry
  - Checks computer location settings
  - 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:2496
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OtKlDrIky" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6F11.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:652
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
    "{path}"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:1052
- C:\Windows\SysWOW64\cscript.exe
  "C:\Windows\SysWOW64\cscript.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2292
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3872

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

4

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

2