amadey | c399da828c92ddf5858f839b584084927f5576ab15f842f3acbd840a89df638a

Windows Service

T1543.003

Disable or Modify Tools

T1562.001

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	86bb1eb3e4.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableIOAVProtection = "1"	86bb1eb3e4.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	86bb1eb3e4.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableRealtimeMonitoring = "1"	86bb1eb3e4.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	86bb1eb3e4.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	86bb1eb3e4.exe

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Stealc family
stealc

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 5 IoCs

evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	c399da828c92ddf5858f839b584084927f5576ab15f842f3acbd840a89df638a.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	skotes.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	17a56b6b01.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	59684fc861.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	86bb1eb3e4.exe

Downloads MZ/PE file

Checks BIOS information in registry 2 TTPs 10 IoCs

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

Query Registry

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	59684fc861.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	59684fc861.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	86bb1eb3e4.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	c399da828c92ddf5858f839b584084927f5576ab15f842f3acbd840a89df638a.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	17a56b6b01.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	17a56b6b01.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	86bb1eb3e4.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	c399da828c92ddf5858f839b584084927f5576ab15f842f3acbd840a89df638a.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	skotes.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	skotes.exe

Executes dropped EXE 4 IoCs

pid	Process
600	skotes.exe
1484	17a56b6b01.exe
2564	59684fc861.exe
1572	86bb1eb3e4.exe

Identifies Wine through registry keys 2 TTPs 5 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000\Software\Wine	59684fc861.exe
Key opened	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000\Software\Wine	86bb1eb3e4.exe
Key opened	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000\Software\Wine	c399da828c92ddf5858f839b584084927f5576ab15f842f3acbd840a89df638a.exe
Key opened	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000\Software\Wine	skotes.exe
Key opened	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000\Software\Wine	17a56b6b01.exe

Loads dropped DLL 7 IoCs

pid	Process
2264	c399da828c92ddf5858f839b584084927f5576ab15f842f3acbd840a89df638a.exe
600	skotes.exe
600	skotes.exe
600	skotes.exe
600	skotes.exe
600	skotes.exe
600	skotes.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features	86bb1eb3e4.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	86bb1eb3e4.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Run\17a56b6b01.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1004753001\\17a56b6b01.exe"	skotes.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Run\59684fc861.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1004754001\\59684fc861.exe"	skotes.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Run\86bb1eb3e4.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1004756001\\86bb1eb3e4.exe"	skotes.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs

pid	Process
2264	c399da828c92ddf5858f839b584084927f5576ab15f842f3acbd840a89df638a.exe
600	skotes.exe
1484	17a56b6b01.exe
2564	59684fc861.exe
1572	86bb1eb3e4.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\skotes.job	c399da828c92ddf5858f839b584084927f5576ab15f842f3acbd840a89df638a.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 5 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	c399da828c92ddf5858f839b584084927f5576ab15f842f3acbd840a89df638a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	skotes.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	17a56b6b01.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	59684fc861.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	86bb1eb3e4.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2264	c399da828c92ddf5858f839b584084927f5576ab15f842f3acbd840a89df638a.exe
600	skotes.exe
1484	17a56b6b01.exe
2564	59684fc861.exe
1572	86bb1eb3e4.exe
1572	86bb1eb3e4.exe
1572	86bb1eb3e4.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1572	86bb1eb3e4.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2264	c399da828c92ddf5858f839b584084927f5576ab15f842f3acbd840a89df638a.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2264 wrote to memory of 600	2264	c399da828c92ddf5858f839b584084927f5576ab15f842f3acbd840a89df638a.exe	31
PID 2264 wrote to memory of 600	2264	c399da828c92ddf5858f839b584084927f5576ab15f842f3acbd840a89df638a.exe	31
PID 2264 wrote to memory of 600	2264	c399da828c92ddf5858f839b584084927f5576ab15f842f3acbd840a89df638a.exe	31
PID 2264 wrote to memory of 600	2264	c399da828c92ddf5858f839b584084927f5576ab15f842f3acbd840a89df638a.exe	31
PID 600 wrote to memory of 1484	600	skotes.exe	33
PID 600 wrote to memory of 1484	600	skotes.exe	33
PID 600 wrote to memory of 1484	600	skotes.exe	33
PID 600 wrote to memory of 1484	600	skotes.exe	33
PID 600 wrote to memory of 2564	600	skotes.exe	35
PID 600 wrote to memory of 2564	600	skotes.exe	35
PID 600 wrote to memory of 2564	600	skotes.exe	35
PID 600 wrote to memory of 2564	600	skotes.exe	35
PID 600 wrote to memory of 1952	600	skotes.exe	36
PID 600 wrote to memory of 1952	600	skotes.exe	36
PID 600 wrote to memory of 1952	600	skotes.exe	36
PID 600 wrote to memory of 1952	600	skotes.exe	36
PID 600 wrote to memory of 1572	600	skotes.exe	37
PID 600 wrote to memory of 1572	600	skotes.exe	37
PID 600 wrote to memory of 1572	600	skotes.exe	37
PID 600 wrote to memory of 1572	600	skotes.exe	37

C:\Users\Admin\AppData\Local\Temp\c399da828c92ddf5858f839b584084927f5576ab15f842f3acbd840a89df638a.exe
"C:\Users\Admin\AppData\Local\Temp\c399da828c92ddf5858f839b584084927f5576ab15f842f3acbd840a89df638a.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:2264
- C:\Users\Admin\AppData\Local\Temp\abc3bc1985\skotes.exe
  "C:\Users\Admin\AppData\Local\Temp\abc3bc1985\skotes.exe"
  2⤵
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Identifies Wine through registry keys
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:600
- - C:\Users\Admin\AppData\Local\Temp\1004753001\17a56b6b01.exe
    "C:\Users\Admin\AppData\Local\Temp\1004753001\17a56b6b01.exe"
    3⤵
    - Identifies VirtualBox via ACPI registry values (likely anti-VM)
    - Checks BIOS information in registry
    - Executes dropped EXE
    - Identifies Wine through registry keys
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:1484
- - C:\Users\Admin\AppData\Local\Temp\1004754001\59684fc861.exe
    "C:\Users\Admin\AppData\Local\Temp\1004754001\59684fc861.exe"
    3⤵
    - Identifies VirtualBox via ACPI registry values (likely anti-VM)
    - Checks BIOS information in registry
    - Executes dropped EXE
    - Identifies Wine through registry keys
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2564
- - C:\Users\Admin\AppData\Local\Temp\abc3bc1985\skotes.exe
    "C:\Users\Admin\AppData\Local\Temp\abc3bc1985\skotes.exe"
    3⤵
    PID:1952
- - C:\Users\Admin\AppData\Local\Temp\1004756001\86bb1eb3e4.exe
    "C:\Users\Admin\AppData\Local\Temp\1004756001\86bb1eb3e4.exe"
    3⤵
    - Modifies Windows Defender Real-time Protection settings
    - Identifies VirtualBox via ACPI registry values (likely anti-VM)
    - Checks BIOS information in registry
    - Executes dropped EXE
    - Identifies Wine through registry keys
    - Windows security modification
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1572

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

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

Virtualization/Sandbox Evasion

Credential Access

Discovery

Query Registry

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion