modiloader | ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af

Bypass User Account Control

T1088

Disabling Security Tools

Modify Registry

Processes:

mstwain32.exeec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exemstwain32.exe

description	ioc	process
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"	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.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
behavioral2/memory/2816-134-0x0000000000000000-mapping.dmp	modiloader_stage2
behavioral2/memory/2816-135-0x0000000000400000-0x000000000044B000-memory.dmp	modiloader_stage2
behavioral2/memory/2816-136-0x0000000000400000-0x000000000044B000-memory.dmp	modiloader_stage2
behavioral2/memory/2816-137-0x0000000000400000-0x000000000044B000-memory.dmp	modiloader_stage2
behavioral2/memory/2816-138-0x0000000000400000-0x000000000044B000-memory.dmp	modiloader_stage2
behavioral2/memory/2816-142-0x0000000000400000-0x000000000044B000-memory.dmp	modiloader_stage2
behavioral2/memory/740-145-0x0000000000000000-mapping.dmp	modiloader_stage2
behavioral2/memory/740-149-0x0000000000400000-0x000000000044B000-memory.dmp	modiloader_stage2
behavioral2/memory/740-150-0x0000000000400000-0x000000000044B000-memory.dmp	modiloader_stage2
behavioral2/memory/740-153-0x0000000000400000-0x000000000044B000-memory.dmp	modiloader_stage2
behavioral2/memory/740-157-0x0000000000400000-0x000000000044B000-memory.dmp	modiloader_stage2

Executes dropped EXE 2 IoCs

Processes:

mstwain32.exemstwain32.exe

pid process

3400 mstwain32.exe
740 mstwain32.exe

pid	process
3400	mstwain32.exe
740	mstwain32.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe

Loads dropped DLL 4 IoCs

Processes:

mstwain32.exe

pid process

740 mstwain32.exe
740 mstwain32.exe
740 mstwain32.exe
740 mstwain32.exe

pid	process
740	mstwain32.exe
740	mstwain32.exe
740	mstwain32.exe
740	mstwain32.exe

Windows security modification 2 TTPs 2 IoCs

Disabling Security Tools

Modify Registry

Processes:

mstwain32.exeec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UACDisableNotify = "0"	mstwain32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UACDisableNotify = "0"	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.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-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\	mstwain32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\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:

mstwain32.exemstwain32.exeec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exeec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe

description	ioc	process
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
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

Suspicious use of SetThreadContext 2 IoCs

Processes:

ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exemstwain32.exe

description	pid	process	target process
PID 4880 set thread context of 2816	4880	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 3400 set thread context of 740	3400	mstwain32.exe	mstwain32.exe

Drops file in Windows directory 4 IoCs

Processes:

ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exemstwain32.exe

description	ioc	process
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
File created	C:\Windows\mstwain32.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.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	2816	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
Token: SeBackupPrivilege	2168	vssvc.exe
Token: SeRestorePrivilege	2168	vssvc.exe
Token: SeAuditPrivilege	2168	vssvc.exe
Token: SeDebugPrivilege	740	mstwain32.exe
Token: SeDebugPrivilege	740	mstwain32.exe

Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exemstwain32.exemstwain32.exe

pid process

4880 ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
3400 mstwain32.exe
740 mstwain32.exe
740 mstwain32.exe

pid	process
4880	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
3400	mstwain32.exe
740	mstwain32.exe
740	mstwain32.exe

Suspicious use of WriteProcessMemory 29 IoCs

Processes:

ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exeec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exemstwain32.exe

description	pid	process	target process
PID 4880 wrote to memory of 2816	4880	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 4880 wrote to memory of 2816	4880	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 4880 wrote to memory of 2816	4880	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 4880 wrote to memory of 2816	4880	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 4880 wrote to memory of 2816	4880	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 4880 wrote to memory of 2816	4880	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 4880 wrote to memory of 2816	4880	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 4880 wrote to memory of 2816	4880	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 4880 wrote to memory of 2816	4880	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 4880 wrote to memory of 2816	4880	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 4880 wrote to memory of 2816	4880	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 4880 wrote to memory of 2816	4880	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 4880 wrote to memory of 2816	4880	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
PID 2816 wrote to memory of 3400	2816	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	mstwain32.exe
PID 2816 wrote to memory of 3400	2816	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	mstwain32.exe
PID 2816 wrote to memory of 3400	2816	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe	mstwain32.exe
PID 3400 wrote to memory of 740	3400	mstwain32.exe	mstwain32.exe
PID 3400 wrote to memory of 740	3400	mstwain32.exe	mstwain32.exe
PID 3400 wrote to memory of 740	3400	mstwain32.exe	mstwain32.exe
PID 3400 wrote to memory of 740	3400	mstwain32.exe	mstwain32.exe
PID 3400 wrote to memory of 740	3400	mstwain32.exe	mstwain32.exe
PID 3400 wrote to memory of 740	3400	mstwain32.exe	mstwain32.exe
PID 3400 wrote to memory of 740	3400	mstwain32.exe	mstwain32.exe
PID 3400 wrote to memory of 740	3400	mstwain32.exe	mstwain32.exe
PID 3400 wrote to memory of 740	3400	mstwain32.exe	mstwain32.exe
PID 3400 wrote to memory of 740	3400	mstwain32.exe	mstwain32.exe
PID 3400 wrote to memory of 740	3400	mstwain32.exe	mstwain32.exe
PID 3400 wrote to memory of 740	3400	mstwain32.exe	mstwain32.exe
PID 3400 wrote to memory of 740	3400	mstwain32.exe	mstwain32.exe

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

Processes:

mstwain32.exeec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exemstwain32.exe

description	ioc	process
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"	ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.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:4880

C:\Users\Admin\AppData\Local\Temp\ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
C:\Users\Admin\AppData\Local\Temp\ec62f21d53859c3d31db7d7f49ccef494793f9dbb6e060f9d42d86403c2853af.exe
2⤵
- Checks computer location settings
- Checks whether UAC is enabled
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2816

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:3400

C:\Windows\mstwain32.exe
C:\Windows\mstwain32.exe
4⤵
- UAC bypass
- Executes dropped EXE
- Loads dropped DLL
- 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:740

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2168

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Bypass User Account Control

T1088

Defense Evasion

Bypass User Account Control

T1088

Disabling Security Tools

3

Modify Registry

5

Credential Access

Discovery

Query Registry