e80c6585c56434eb0b2085157e4493e1f027fb5d8e3683abfd205d053e38b19f

Virtualization/Sandbox Evasion

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

Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs

evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	sohomsloader.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	sohomsloader.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	sohomsloader.exe

Themida packer 6 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/2112-0-0x00007FF608010000-0x00007FF6089FE000-memory.dmp	themida
behavioral2/memory/2112-2-0x00007FF608010000-0x00007FF6089FE000-memory.dmp	themida
behavioral2/memory/2112-3-0x00007FF608010000-0x00007FF6089FE000-memory.dmp	themida
behavioral2/memory/2112-4-0x00007FF608010000-0x00007FF6089FE000-memory.dmp	themida
behavioral2/memory/2112-5-0x00007FF608010000-0x00007FF6089FE000-memory.dmp	themida
behavioral2/memory/2112-6-0x00007FF608010000-0x00007FF6089FE000-memory.dmp	themida

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	sohomsloader.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 3 IoCs

pid	Process
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe

Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 1 IoCs

Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.

System Information Discovery

description	ioc	Process
File opened (read-only)	\??\VBoxMiniRdrDN	sohomsloader.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe
2112	sohomsloader.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2112 wrote to memory of 3792	2112	sohomsloader.exe	86
PID 2112 wrote to memory of 3792	2112	sohomsloader.exe	86
PID 3792 wrote to memory of 2816	3792	cmd.exe	87
PID 3792 wrote to memory of 2816	3792	cmd.exe	87
PID 3792 wrote to memory of 4760	3792	cmd.exe	88
PID 3792 wrote to memory of 4760	3792	cmd.exe	88
PID 3792 wrote to memory of 1152	3792	cmd.exe	89
PID 3792 wrote to memory of 1152	3792	cmd.exe	89
PID 2112 wrote to memory of 2920	2112	sohomsloader.exe	91
PID 2112 wrote to memory of 2920	2112	sohomsloader.exe	91
PID 2112 wrote to memory of 2328	2112	sohomsloader.exe	93
PID 2112 wrote to memory of 2328	2112	sohomsloader.exe	93

C:\Users\Admin\AppData\Local\Temp\sohomsloader.exe
"C:\Users\Admin\AppData\Local\Temp\sohomsloader.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Looks for VirtualBox Guest Additions in registry
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks for VirtualBox DLLs, possible anti-VM trick
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2112
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\sohomsloader.exe" MD5 | find /i /v "md5" | find /i /v "certutil"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3792
- - C:\Windows\system32\certutil.exe
    certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\sohomsloader.exe" MD5
    3⤵
    PID:2816
- - C:\Windows\system32\find.exe
    find /i /v "md5"
    3⤵
    PID:4760
- - C:\Windows\system32\find.exe
    find /i /v "certutil"
    3⤵
    PID:1152
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c cls
  2⤵
  PID:2920
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c cls
  2⤵
  PID:2328

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

Credential Access

Discovery

Query Registry

System Information Discovery

Virtualization/Sandbox Evasion