modiloader | ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af

Bypass User Account Control

T1088

Disabling Security Tools

Modify Registry

Processes:

ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exemstwain32.exemstwain32.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	mstwain32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	mstwain32.exe

Windows security bypass 2 TTPs 2 IoCs

Disabling Security Tools

Modify Registry

Processes:

ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exemstwain32.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0"	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0"	mstwain32.exe

ModiLoader Second Stage 11 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1320-56-0x0000000000400000-0x000000000044B000-memory.dmp	modiloader_stage2
behavioral1/memory/1320-57-0x0000000000430464-mapping.dmp	modiloader_stage2
behavioral1/memory/1320-58-0x0000000000400000-0x000000000044B000-memory.dmp	modiloader_stage2
behavioral1/memory/1320-60-0x0000000000400000-0x000000000044B000-memory.dmp	modiloader_stage2
behavioral1/memory/1320-61-0x0000000000400000-0x000000000044B000-memory.dmp	modiloader_stage2
behavioral1/memory/1320-62-0x0000000000400000-0x000000000044B000-memory.dmp	modiloader_stage2
behavioral1/memory/560-69-0x0000000000430464-mapping.dmp	modiloader_stage2
behavioral1/memory/1320-74-0x0000000000400000-0x000000000044B000-memory.dmp	modiloader_stage2
behavioral1/memory/560-75-0x0000000000400000-0x000000000044B000-memory.dmp	modiloader_stage2
behavioral1/memory/560-77-0x0000000000400000-0x000000000044B000-memory.dmp	modiloader_stage2
behavioral1/memory/560-78-0x0000000000400000-0x000000000044B000-memory.dmp	modiloader_stage2

Executes dropped EXE 2 IoCs

Processes:

mstwain32.exemstwain32.exe

pid process

980 mstwain32.exe
560 mstwain32.exe

pid	process
980	mstwain32.exe
560	mstwain32.exe

Windows security modification 2 TTPs 2 IoCs

Disabling Security Tools

Modify Registry

Processes:

ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exemstwain32.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0"	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0"	mstwain32.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

Processes:

mstwain32.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\	mstwain32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run\mstwain32 = "C:\\Windows\\mstwain32.exe"	mstwain32.exe

Checks whether UAC is enabled 1 TTPs 5 IoCs

System Information Discovery

T1082

Processes:

ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exeec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exemstwain32.exemstwain32.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	mstwain32.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

Suspicious use of SetThreadContext 2 IoCs

Processes:

ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exemstwain32.exe

description	pid	process	target process
PID 2032 set thread context of 1320	2032	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 980 set thread context of 560	980	mstwain32.exe	mstwain32.exe

Drops file in Windows directory 4 IoCs

Processes:

ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exemstwain32.exe

description	ioc	process
File created	C:\Windows\mstwain32.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
File opened for modification	C:\Windows\mstwain32.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.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). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exevssvc.exemstwain32.exe

description	pid	process
Token: SeDebugPrivilege	1320	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
Token: SeBackupPrivilege	1148	vssvc.exe
Token: SeRestorePrivilege	1148	vssvc.exe
Token: SeAuditPrivilege	1148	vssvc.exe
Token: SeDebugPrivilege	560	mstwain32.exe
Token: SeDebugPrivilege	560	mstwain32.exe

Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exemstwain32.exemstwain32.exe

pid process

2032 ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
980 mstwain32.exe
560 mstwain32.exe
560 mstwain32.exe

pid	process
2032	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
980	mstwain32.exe
560	mstwain32.exe
560	mstwain32.exe

Suspicious use of WriteProcessMemory 32 IoCs

Processes:

ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exeec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exemstwain32.exe

description	pid	process	target process
PID 2032 wrote to memory of 1320	2032	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 2032 wrote to memory of 1320	2032	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 2032 wrote to memory of 1320	2032	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 2032 wrote to memory of 1320	2032	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 2032 wrote to memory of 1320	2032	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 2032 wrote to memory of 1320	2032	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 2032 wrote to memory of 1320	2032	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 2032 wrote to memory of 1320	2032	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 2032 wrote to memory of 1320	2032	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 2032 wrote to memory of 1320	2032	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 2032 wrote to memory of 1320	2032	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 2032 wrote to memory of 1320	2032	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 2032 wrote to memory of 1320	2032	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 2032 wrote to memory of 1320	2032	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 1320 wrote to memory of 980	1320	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	mstwain32.exe
PID 1320 wrote to memory of 980	1320	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	mstwain32.exe
PID 1320 wrote to memory of 980	1320	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	mstwain32.exe
PID 1320 wrote to memory of 980	1320	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	mstwain32.exe
PID 980 wrote to memory of 560	980	mstwain32.exe	mstwain32.exe
PID 980 wrote to memory of 560	980	mstwain32.exe	mstwain32.exe
PID 980 wrote to memory of 560	980	mstwain32.exe	mstwain32.exe
PID 980 wrote to memory of 560	980	mstwain32.exe	mstwain32.exe
PID 980 wrote to memory of 560	980	mstwain32.exe	mstwain32.exe
PID 980 wrote to memory of 560	980	mstwain32.exe	mstwain32.exe
PID 980 wrote to memory of 560	980	mstwain32.exe	mstwain32.exe
PID 980 wrote to memory of 560	980	mstwain32.exe	mstwain32.exe
PID 980 wrote to memory of 560	980	mstwain32.exe	mstwain32.exe
PID 980 wrote to memory of 560	980	mstwain32.exe	mstwain32.exe
PID 980 wrote to memory of 560	980	mstwain32.exe	mstwain32.exe
PID 980 wrote to memory of 560	980	mstwain32.exe	mstwain32.exe
PID 980 wrote to memory of 560	980	mstwain32.exe	mstwain32.exe
PID 980 wrote to memory of 560	980	mstwain32.exe	mstwain32.exe

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

Processes:

ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exemstwain32.exemstwain32.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	mstwain32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	mstwain32.exe

C:\Users\Admin\AppData\Local\Temp\ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
"C:\Users\Admin\AppData\Local\Temp\ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe"
1⤵
- UAC bypass
- Windows security bypass
- Windows security modification
- Checks whether UAC is enabled
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2032

C:\Users\Admin\AppData\Local\Temp\ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
C:\Users\Admin\AppData\Local\Temp\ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
2⤵
- Checks whether UAC is enabled
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1320

C:\Windows\mstwain32.exe
"C:\Windows\mstwain32.exe" \melt "C:\Users\Admin\AppData\Local\Temp\ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe"
3⤵
- UAC bypass
- Windows security bypass
- Executes dropped EXE
- Windows security modification
- Checks whether UAC is enabled
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
PID:980

C:\Windows\mstwain32.exe
C:\Windows\mstwain32.exe
4⤵
- UAC bypass
- Executes dropped EXE
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- System policy modification
PID:560

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1148

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Bypass User Account Control

1

T1088

Defense Evasion

Bypass User Account Control

1

T1088

Disabling Security Tools

3

Modify Registry

5