modiloader | e5e5e1bef25eb1961f069f2da570f77f3bbbbae4ae24fed5fcfce5b21ac281b5

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	mstwain32.exe

ModiLoader Second Stage 2 IoCs

resource	yara_rule
behavioral2/memory/2620-33-0x0000000000400000-0x00000000004FF000-memory.dmp	modiloader_stage2
behavioral2/memory/4780-68-0x0000000000400000-0x00000000004FF000-memory.dmp	modiloader_stage2

Checks BIOS information in registry 2 TTPs 4 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\SystemBiosDate	fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	mstwain32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	mstwain32.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
4780	mstwain32.exe

Executes dropped EXE 1 IoCs

pid	Process
4780	mstwain32.exe

Loads dropped DLL 4 IoCs

pid	Process
4780	mstwain32.exe
4780	mstwain32.exe
4780	mstwain32.exe
4780	mstwain32.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\mstwain32 = "C:\\Windows\\mstwain32.exe"	mstwain32.exe

Checks whether UAC is enabled 1 TTPs 3 IoCs

evasion trojan

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	mstwain32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	mstwain32.exe

UPX packed file 16 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2620-5-0x00000000006C0000-0x00000000006D1000-memory.dmp	upx
behavioral2/memory/2620-4-0x00000000006C0000-0x00000000006D1000-memory.dmp	upx
behavioral2/memory/2620-3-0x00000000006C0000-0x00000000006D1000-memory.dmp	upx
behavioral2/memory/2620-2-0x00000000006C0000-0x00000000006D1000-memory.dmp	upx
behavioral2/memory/2620-1-0x00000000006C0000-0x00000000006D1000-memory.dmp	upx
behavioral2/memory/2620-6-0x0000000002560000-0x0000000002598000-memory.dmp	upx
behavioral2/memory/2620-7-0x0000000002560000-0x0000000002598000-memory.dmp	upx
behavioral2/memory/2620-10-0x0000000077530000-0x0000000077620000-memory.dmp	upx
behavioral2/memory/2620-11-0x0000000077530000-0x0000000077620000-memory.dmp	upx
behavioral2/memory/2620-26-0x00000000006C0000-0x00000000006D1000-memory.dmp	upx
behavioral2/memory/2620-32-0x0000000002560000-0x0000000002598000-memory.dmp	upx
behavioral2/memory/4780-37-0x00000000022B0000-0x00000000022C1000-memory.dmp	upx
behavioral2/memory/4780-36-0x00000000022B0000-0x00000000022C1000-memory.dmp	upx
behavioral2/memory/4780-35-0x00000000022B0000-0x00000000022C1000-memory.dmp	upx
behavioral2/memory/4780-34-0x00000000022B0000-0x00000000022C1000-memory.dmp	upx
behavioral2/memory/4780-39-0x0000000002A60000-0x0000000002A98000-memory.dmp	upx

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\cmsetac.dll	mstwain32.exe
File created	C:\Windows\mstwain32.exe	fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe
File opened for modification	C:\Windows\mstwain32.exe	fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe
File created	C:\Windows\ntdtcstp.dll	mstwain32.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 2 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	fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mstwain32.exe

Checks processor information in registry 2 TTPs 14 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

description	ioc	Process
Key value enumerated	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\FeatureSet	mstwain32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe
Key queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\FeatureSet	fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	mstwain32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	mstwain32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	mstwain32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe
Key queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	mstwain32.exe
Key value enumerated	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	mstwain32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	mstwain32.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	mstwain32.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2620	fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe
Token: SeBackupPrivilege	2332	vssvc.exe
Token: SeRestorePrivilege	2332	vssvc.exe
Token: SeAuditPrivilege	2332	vssvc.exe
Token: SeDebugPrivilege	4780	mstwain32.exe
Token: SeDebugPrivilege	4780	mstwain32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4780	mstwain32.exe
4780	mstwain32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2620 wrote to memory of 4780	2620	fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe	85
PID 2620 wrote to memory of 4780	2620	fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe	85
PID 2620 wrote to memory of 4780	2620	fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe	85

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	mstwain32.exe

Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe"
1⤵
- Checks BIOS information in registry
- Checks computer location settings
- Checks whether UAC is enabled
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2620
- C:\Windows\mstwain32.exe
  "C:\Windows\mstwain32.exe" \melt "C:\Users\Admin\AppData\Local\Temp\fa72f3347d70bae751560d4ee404c196_JaffaCakes118.exe"
  2⤵
  - UAC bypass
  - Checks BIOS information in registry
  - Deletes itself
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Checks whether UAC is enabled
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - System policy modification
  PID:4780

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2332

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery