netwire | f9bf619a41a56cae6b8e6d5b3fb3d3afdd7976745dbe9cc7f90ba4dcadc35d9b

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	f9bf619a41a56cae6b8e6d5b3fb3d3afdd7976745dbe9cc7f90ba4dcadc35d9b.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	service.exe

Executes dropped EXE 2 IoCs

pid	Process
1660	service.exe
4072	service.exe

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-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ronies = "C:\\Users\\Admin\\AppData\\Local\\Temp\\service.exe"	service.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1660 set thread context of 4072	1660	service.exe	89

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 4 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	f9bf619a41a56cae6b8e6d5b3fb3d3afdd7976745dbe9cc7f90ba4dcadc35d9b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	service.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

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

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

System Information Discovery

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

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000_Classes\Local Settings	f9bf619a41a56cae6b8e6d5b3fb3d3afdd7976745dbe9cc7f90ba4dcadc35d9b.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

pid	Process
2880	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
4596	WINWORD.EXE
4596	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1660	service.exe
1660	service.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1660	service.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
4596	WINWORD.EXE
4596	WINWORD.EXE
4596	WINWORD.EXE
4596	WINWORD.EXE
4596	WINWORD.EXE
4596	WINWORD.EXE
4596	WINWORD.EXE
4596	WINWORD.EXE
4596	WINWORD.EXE
4596	WINWORD.EXE

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4564 wrote to memory of 1660	4564	f9bf619a41a56cae6b8e6d5b3fb3d3afdd7976745dbe9cc7f90ba4dcadc35d9b.exe	83
PID 4564 wrote to memory of 1660	4564	f9bf619a41a56cae6b8e6d5b3fb3d3afdd7976745dbe9cc7f90ba4dcadc35d9b.exe	83
PID 4564 wrote to memory of 1660	4564	f9bf619a41a56cae6b8e6d5b3fb3d3afdd7976745dbe9cc7f90ba4dcadc35d9b.exe	83
PID 4564 wrote to memory of 4596	4564	f9bf619a41a56cae6b8e6d5b3fb3d3afdd7976745dbe9cc7f90ba4dcadc35d9b.exe	85
PID 4564 wrote to memory of 4596	4564	f9bf619a41a56cae6b8e6d5b3fb3d3afdd7976745dbe9cc7f90ba4dcadc35d9b.exe	85
PID 1660 wrote to memory of 2880	1660	service.exe	87
PID 1660 wrote to memory of 2880	1660	service.exe	87
PID 1660 wrote to memory of 2880	1660	service.exe	87
PID 1660 wrote to memory of 4072	1660	service.exe	89
PID 1660 wrote to memory of 4072	1660	service.exe	89
PID 1660 wrote to memory of 4072	1660	service.exe	89
PID 1660 wrote to memory of 4072	1660	service.exe	89
PID 1660 wrote to memory of 4072	1660	service.exe	89
PID 1660 wrote to memory of 4072	1660	service.exe	89
PID 1660 wrote to memory of 4072	1660	service.exe	89
PID 1660 wrote to memory of 4072	1660	service.exe	89
PID 1660 wrote to memory of 4072	1660	service.exe	89
PID 1660 wrote to memory of 4072	1660	service.exe	89
PID 1660 wrote to memory of 4072	1660	service.exe	89

C:\Users\Admin\AppData\Local\Temp\f9bf619a41a56cae6b8e6d5b3fb3d3afdd7976745dbe9cc7f90ba4dcadc35d9b.exe
"C:\Users\Admin\AppData\Local\Temp\f9bf619a41a56cae6b8e6d5b3fb3d3afdd7976745dbe9cc7f90ba4dcadc35d9b.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4564
- C:\Users\Admin\AppData\Local\Temp\service.exe
  "C:\Users\Admin\AppData\Local\Temp\service.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1660
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\HRgFfvmwT" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7C44.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2880
- - C:\Users\Admin\AppData\Local\Temp\service.exe
    "C:\Users\Admin\AppData\Local\Temp\service.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    PID:4072
- C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
  "C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\CPA accountant COVID_19 pandemic relief (20,000$).docx" /o ""
  2⤵
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of SetWindowsHookEx
  PID:4596

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

3

System Information Discovery

4

System Location Discovery

T1614

System Language Discovery