c0b83b92765df26c382fed68564097c14fbaf4d4b05647fb2c80a9ca39107ef1

Peripheral Device Discovery

T1120

System Information Discovery

Processes:

regsvr32.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Sanu&Prod_Sanu_DVD-ROM\4&37ce57ba&0&010000\Service	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_&PROD_HEARTDISK\4&37CE57BA&0&000000	regsvr32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_&Prod_HeartDisk\4&37ce57ba&0&000000\DeviceDesc	regsvr32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_&Prod_HeartDisk\4&37ce57ba&0&000000\Service	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CDROM&VEN_SANU&PROD_SANU_DVD-ROM\4&37CE57BA&0&010000	regsvr32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Sanu&Prod_Sanu_DVD-ROM\4&37ce57ba&0&010000\DeviceDesc	regsvr32.exe

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

System Information Discovery

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

3808 schtasks.exe

pid	process
3808	schtasks.exe

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

System Information Discovery

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

3272 EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 18 IoCs

Processes:

regsvr32.exeWerFault.exe

pid	process
1532	regsvr32.exe
1532	regsvr32.exe
1532	regsvr32.exe
1532	regsvr32.exe
3920	WerFault.exe
3920	WerFault.exe
3920	WerFault.exe
3920	WerFault.exe
3920	WerFault.exe
3920	WerFault.exe
3920	WerFault.exe
3920	WerFault.exe
3920	WerFault.exe
3920	WerFault.exe
3920	WerFault.exe
3920	WerFault.exe
3920	WerFault.exe
3920	WerFault.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

regsvr32.exe

pid process

1532 regsvr32.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

WerFault.exe

description pid process

Token: SeRestorePrivilege 3920 WerFault.exe
Token: SeBackupPrivilege 3920 WerFault.exe
Token: SeDebugPrivilege 3920 WerFault.exe

description	pid	process
Token: SeRestorePrivilege	3920	WerFault.exe
Token: SeBackupPrivilege	3920	WerFault.exe
Token: SeDebugPrivilege	3920	WerFault.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
3272	EXCEL.EXE
3272	EXCEL.EXE
3272	EXCEL.EXE
3272	EXCEL.EXE
3272	EXCEL.EXE
3272	EXCEL.EXE
3272	EXCEL.EXE
3272	EXCEL.EXE
3272	EXCEL.EXE
3272	EXCEL.EXE
3272	EXCEL.EXE
3272	EXCEL.EXE

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

EXCEL.EXEregsvr32.exeregsvr32.exeexplorer.exe

description	pid	process	target process
PID 3272 wrote to memory of 412	3272	EXCEL.EXE	regsvr32.exe
PID 3272 wrote to memory of 412	3272	EXCEL.EXE	regsvr32.exe
PID 412 wrote to memory of 1532	412	regsvr32.exe	regsvr32.exe
PID 412 wrote to memory of 1532	412	regsvr32.exe	regsvr32.exe
PID 412 wrote to memory of 1532	412	regsvr32.exe	regsvr32.exe
PID 1532 wrote to memory of 3508	1532	regsvr32.exe	explorer.exe
PID 1532 wrote to memory of 3508	1532	regsvr32.exe	explorer.exe
PID 1532 wrote to memory of 3508	1532	regsvr32.exe	explorer.exe
PID 1532 wrote to memory of 3508	1532	regsvr32.exe	explorer.exe
PID 1532 wrote to memory of 3508	1532	regsvr32.exe	explorer.exe
PID 3508 wrote to memory of 3808	3508	explorer.exe	schtasks.exe
PID 3508 wrote to memory of 3808	3508	explorer.exe	schtasks.exe
PID 3508 wrote to memory of 3808	3508	explorer.exe	schtasks.exe

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\CompensationClaim-249761403-11242020.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3272

C:\Windows\SYSTEM32\regsvr32.exe
regsvr32.exe -s C:\LotWin\LotWin2\Horsew.dll
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:412

C:\Windows\SysWOW64\regsvr32.exe
-s C:\LotWin\LotWin2\Horsew.dll
3⤵
- Loads dropped DLL
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1532

C:\Windows\SysWOW64\explorer.exe
C:\Windows\SysWOW64\explorer.exe
4⤵
- Suspicious use of WriteProcessMemory
PID:3508

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\system32\schtasks.exe" /Create /RU "NT AUTHORITY\SYSTEM" /tn qgecujrsx /tr "regsvr32.exe -s \"\"" /SC ONCE /Z /ST 22:42 /ET 22:54
5⤵
- Creates scheduled task(s)
PID:3808

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1532 -s 772
4⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3920

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

3

Peripheral Device Discovery

T1120

System Information Discovery

3