darktrack | 98d8fec346fc1865dc8b620f74826f484fe9c0c705dc9d58c5f44df934a01208

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	msm.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	msm.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	msm.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

defense_evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1161330783-2912525651-1278508834-1000\Software\Wine	msm.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

defense_evasion trojan

System Information Discovery

T1082

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

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	msm.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
3684	msm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3684 set thread context of 3380	3684	msm.exe	87

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2532	3380	WerFault.exe	87

System Location Discovery: System Language Discovery 1 TTPs 1 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	msm.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3684	msm.exe
3684	msm.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3684 wrote to memory of 3380	3684	msm.exe	87
PID 3684 wrote to memory of 3380	3684	msm.exe	87
PID 3684 wrote to memory of 3380	3684	msm.exe	87
PID 3684 wrote to memory of 3380	3684	msm.exe	87
PID 3684 wrote to memory of 3380	3684	msm.exe	87
PID 3684 wrote to memory of 3380	3684	msm.exe	87
PID 3684 wrote to memory of 3380	3684	msm.exe	87
PID 3684 wrote to memory of 3380	3684	msm.exe	87
PID 3684 wrote to memory of 3380	3684	msm.exe	87
PID 3684 wrote to memory of 3380	3684	msm.exe	87
PID 3684 wrote to memory of 3380	3684	msm.exe	87
PID 3684 wrote to memory of 3380	3684	msm.exe	87

C:\Users\Admin\AppData\Local\Temp\msm.exe
"C:\Users\Admin\AppData\Local\Temp\msm.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Checks whether UAC is enabled
- Writes to the Master Boot Record (MBR)
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3684
- C:\Users\Admin\AppData\Local\Temp\msm.exe
  "C:\Users\Admin\AppData\Local\Temp\msm.exe"
  2⤵
  PID:3380
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3380 -s 508
    3⤵
    - Program crash
    PID:2532

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3380 -ip 3380
1⤵
PID:1984

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

T1542

Bootkit

T1542.003

Virtualization/Sandbox Evasion

2

Credential Access

Discovery

Query Registry

3

System Information Discovery

2

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

2