modiloader | 9dcc417585e00375d96009b5ee6036f508e5807212cb85d8587bdca6dde44b3b

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	e8b1b4afc6ea42f7b8973f5498ad548a_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	mstwain32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	mstwain32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	e8b1b4afc6ea42f7b8973f5498ad548a_JaffaCakes118.exe

Deletes itself 1 IoCs

pid	Process
2296	mstwain32.exe

Executes dropped EXE 1 IoCs

pid	Process
2296	mstwain32.exe

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral1/memory/3024-4-0x00000000002B0000-0x00000000002C1000-memory.dmp	upx
behavioral1/memory/3024-3-0x00000000002B0000-0x00000000002C1000-memory.dmp	upx
behavioral1/memory/3024-2-0x00000000002B0000-0x00000000002C1000-memory.dmp	upx
behavioral1/memory/3024-1-0x00000000002B0000-0x00000000002C1000-memory.dmp	upx
behavioral1/memory/3024-5-0x00000000002B0000-0x00000000002C1000-memory.dmp	upx
behavioral1/memory/3024-18-0x00000000002B0000-0x00000000002C1000-memory.dmp	upx
behavioral1/memory/2296-25-0x0000000000350000-0x0000000000361000-memory.dmp	upx
behavioral1/memory/2296-26-0x0000000000350000-0x0000000000361000-memory.dmp	upx
behavioral1/memory/2296-24-0x0000000000350000-0x0000000000361000-memory.dmp	upx
behavioral1/memory/2296-23-0x0000000000350000-0x0000000000361000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\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	e8b1b4afc6ea42f7b8973f5498ad548a_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

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\mstwain32.exe	e8b1b4afc6ea42f7b8973f5498ad548a_JaffaCakes118.exe
File opened for modification	C:\Windows\mstwain32.exe	e8b1b4afc6ea42f7b8973f5498ad548a_JaffaCakes118.exe
File created	C:\Windows\ntdtcstp.dll	mstwain32.exe
File created	C:\Windows\cmsetac.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	e8b1b4afc6ea42f7b8973f5498ad548a_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 opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	e8b1b4afc6ea42f7b8973f5498ad548a_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	e8b1b4afc6ea42f7b8973f5498ad548a_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	e8b1b4afc6ea42f7b8973f5498ad548a_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	mstwain32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\FeatureSet	mstwain32.exe
Key queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	e8b1b4afc6ea42f7b8973f5498ad548a_JaffaCakes118.exe
Key value enumerated	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	e8b1b4afc6ea42f7b8973f5498ad548a_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\FeatureSet	e8b1b4afc6ea42f7b8973f5498ad548a_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	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\ProcessorNameString	e8b1b4afc6ea42f7b8973f5498ad548a_JaffaCakes118.exe
Key queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	mstwain32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	mstwain32.exe
Key value enumerated	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	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	mstwain32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	e8b1b4afc6ea42f7b8973f5498ad548a_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	3024	e8b1b4afc6ea42f7b8973f5498ad548a_JaffaCakes118.exe
Token: SeBackupPrivilege	2132	vssvc.exe
Token: SeRestorePrivilege	2132	vssvc.exe
Token: SeAuditPrivilege	2132	vssvc.exe
Token: SeDebugPrivilege	2296	mstwain32.exe
Token: SeDebugPrivilege	2296	mstwain32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2296	mstwain32.exe
2296	mstwain32.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3024 wrote to memory of 2296	3024	e8b1b4afc6ea42f7b8973f5498ad548a_JaffaCakes118.exe	33
PID 3024 wrote to memory of 2296	3024	e8b1b4afc6ea42f7b8973f5498ad548a_JaffaCakes118.exe	33
PID 3024 wrote to memory of 2296	3024	e8b1b4afc6ea42f7b8973f5498ad548a_JaffaCakes118.exe	33
PID 3024 wrote to memory of 2296	3024	e8b1b4afc6ea42f7b8973f5498ad548a_JaffaCakes118.exe	33

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

T1112

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\e8b1b4afc6ea42f7b8973f5498ad548a_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e8b1b4afc6ea42f7b8973f5498ad548a_JaffaCakes118.exe"
1⤵
- Checks BIOS information in registry
- 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:3024
- C:\Windows\mstwain32.exe
  "C:\Windows\mstwain32.exe" \melt "C:\Users\Admin\AppData\Local\Temp\e8b1b4afc6ea42f7b8973f5498ad548a_JaffaCakes118.exe"
  2⤵
  - UAC bypass
  - Checks BIOS information in registry
  - Deletes itself
  - Executes dropped EXE
  - 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:2296

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2132

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

Modify Registry

Credential Access

Discovery

Query Registry

3

System Information Discovery

5

System Location Discovery

T1614

System Language Discovery