xred | 738b2e06833209e95512dcf652b42691e38744657359828c5ac6cd664312b7b5

System Information Discovery

Processes:

RdpStealer.exeSynaptics.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	RdpStealer.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	Synaptics.exe

Executes dropped EXE 3 IoCs

Processes:

._cache_RdpStealer.exeSynaptics.exe._cache_Synaptics.exe

pid process

1380 ._cache_RdpStealer.exe
2156 Synaptics.exe
100 ._cache_Synaptics.exe

pid	process
1380	._cache_RdpStealer.exe
2156	Synaptics.exe
100	._cache_Synaptics.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

RdpStealer.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Synaptics Pointing Device Driver = "C:\\ProgramData\\Synaptics\\Synaptics.exe"	RdpStealer.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 8 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

Processes:

cmd.execmd.exetimeout.exetimeout.exeRdpStealer.exe._cache_RdpStealer.exeSynaptics.exe._cache_Synaptics.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RdpStealer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	._cache_RdpStealer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Synaptics.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	._cache_Synaptics.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

Delays execution with timeout.exe 2 IoCs
evasion

Processes:

timeout.exetimeout.exe

pid process

4268 timeout.exe
1880 timeout.exe

pid	process
4268	timeout.exe
1880	timeout.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

Modifies registry class 2 IoCs

Processes:

RdpStealer.exeSynaptics.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	RdpStealer.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	Synaptics.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

892 EXCEL.EXE
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

._cache_RdpStealer.exe._cache_Synaptics.exe

description pid process

Token: SeDebugPrivilege 1380 ._cache_RdpStealer.exe
Token: SeDebugPrivilege 100 ._cache_Synaptics.exe
Suspicious use of SetWindowsHookEx 8 IoCs

Processes:

EXCEL.EXE

pid process

892 EXCEL.EXE
892 EXCEL.EXE
892 EXCEL.EXE
892 EXCEL.EXE
892 EXCEL.EXE
892 EXCEL.EXE
892 EXCEL.EXE
892 EXCEL.EXE

pid	process
892	EXCEL.EXE

description	pid	process
Token: SeDebugPrivilege	1380	._cache_RdpStealer.exe
Token: SeDebugPrivilege	100	._cache_Synaptics.exe

pid	process
892	EXCEL.EXE
892	EXCEL.EXE
892	EXCEL.EXE
892	EXCEL.EXE
892	EXCEL.EXE
892	EXCEL.EXE
892	EXCEL.EXE
892	EXCEL.EXE

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

RdpStealer.exeSynaptics.exe._cache_Synaptics.exe._cache_RdpStealer.execmd.execmd.exe

description	pid	process	target process
PID 3104 wrote to memory of 1380	3104	RdpStealer.exe	._cache_RdpStealer.exe
PID 3104 wrote to memory of 1380	3104	RdpStealer.exe	._cache_RdpStealer.exe
PID 3104 wrote to memory of 1380	3104	RdpStealer.exe	._cache_RdpStealer.exe
PID 3104 wrote to memory of 2156	3104	RdpStealer.exe	Synaptics.exe
PID 3104 wrote to memory of 2156	3104	RdpStealer.exe	Synaptics.exe
PID 3104 wrote to memory of 2156	3104	RdpStealer.exe	Synaptics.exe
PID 2156 wrote to memory of 100	2156	Synaptics.exe	._cache_Synaptics.exe
PID 2156 wrote to memory of 100	2156	Synaptics.exe	._cache_Synaptics.exe
PID 2156 wrote to memory of 100	2156	Synaptics.exe	._cache_Synaptics.exe
PID 100 wrote to memory of 3380	100	._cache_Synaptics.exe	cmd.exe
PID 100 wrote to memory of 3380	100	._cache_Synaptics.exe	cmd.exe
PID 100 wrote to memory of 3380	100	._cache_Synaptics.exe	cmd.exe
PID 1380 wrote to memory of 3716	1380	._cache_RdpStealer.exe	cmd.exe
PID 1380 wrote to memory of 3716	1380	._cache_RdpStealer.exe	cmd.exe
PID 1380 wrote to memory of 3716	1380	._cache_RdpStealer.exe	cmd.exe
PID 3380 wrote to memory of 4268	3380	cmd.exe	timeout.exe
PID 3380 wrote to memory of 4268	3380	cmd.exe	timeout.exe
PID 3380 wrote to memory of 4268	3380	cmd.exe	timeout.exe
PID 3716 wrote to memory of 1880	3716	cmd.exe	timeout.exe
PID 3716 wrote to memory of 1880	3716	cmd.exe	timeout.exe
PID 3716 wrote to memory of 1880	3716	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\RdpStealer\RdpStealer.exe
"C:\Users\Admin\AppData\Local\Temp\RdpStealer\RdpStealer.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3104
- C:\Users\Admin\AppData\Local\Temp\RdpStealer\._cache_RdpStealer.exe
  "C:\Users\Admin\AppData\Local\Temp\RdpStealer\._cache_RdpStealer.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1380
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp191.tmp.cmd""
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3716
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 4
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:1880
- C:\ProgramData\Synaptics\Synaptics.exe
  "C:\ProgramData\Synaptics\Synaptics.exe" InjUpdate
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2156
- - C:\Users\Admin\AppData\Local\Temp\RdpStealer\._cache_Synaptics.exe
    "C:\Users\Admin\AppData\Local\Temp\RdpStealer\._cache_Synaptics.exe" InjUpdate
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:100
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp153.tmp.cmd""
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:3380
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout 4
        5⤵
        System Location Discovery: System Language Discovery
        Delays execution with timeout.exe
        
        PID:4268

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" /automation -Embedding
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:892

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

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

3

System Information Discovery

4

System Location Discovery

T1614

System Language Discovery