agenttesla | 85a8d0cee047255ca84d6f48058a553a783745b13196151c5dc34ade36599a0e

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Oracle\VirtualBox Guest Additions	Sleettz Virtualization.exe

Looks for VMWare Tools registry key 2 TTPs 1 IoCs

evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\VMware, Inc.\VMware Tools	Sleettz Virtualization.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS 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\SystemBiosVersion	Sleettz Virtualization.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Sleettz Virtualization.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

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

Query Registry

Peripheral Device Discovery

T1120

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	Sleettz Virtualization.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	Sleettz Virtualization.exe

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	Sleettz Virtualization.exe
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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
708	timeout.exe

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemVersion	Sleettz Virtualization.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	Sleettz Virtualization.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer	Sleettz Virtualization.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
544	Sleettz Virtualization.exe
544	Sleettz Virtualization.exe
544	Sleettz Virtualization.exe
544	Sleettz Virtualization.exe
544	Sleettz Virtualization.exe
544	Sleettz Virtualization.exe
544	Sleettz Virtualization.exe
544	Sleettz Virtualization.exe
544	Sleettz Virtualization.exe
544	Sleettz Virtualization.exe
544	Sleettz Virtualization.exe
544	Sleettz Virtualization.exe
544	Sleettz Virtualization.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	544	Sleettz Virtualization.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 544 wrote to memory of 3060	544	Sleettz Virtualization.exe	93
PID 544 wrote to memory of 3060	544	Sleettz Virtualization.exe	93
PID 544 wrote to memory of 3060	544	Sleettz Virtualization.exe	93
PID 3060 wrote to memory of 4468	3060	cmd.exe	95
PID 3060 wrote to memory of 4468	3060	cmd.exe	95
PID 3060 wrote to memory of 4468	3060	cmd.exe	95
PID 4468 wrote to memory of 708	4468	cmd.exe	97
PID 4468 wrote to memory of 708	4468	cmd.exe	97
PID 4468 wrote to memory of 708	4468	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\Sleettz Virtualization.exe
"C:\Users\Admin\AppData\Local\Temp\Sleettz Virtualization.exe"
1⤵
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Maps connected drives based on registry
- System Location Discovery: System Language Discovery
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:544
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /c start cmd /C "color b && title Error && echo You must run the function KeyAuthApp.init(); first && timeout /t 5"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3060
- - C:\Windows\SysWOW64\cmd.exe
    cmd /C "color b && title Error && echo You must run the function KeyAuthApp.init(); first && timeout /t 5"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4468
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 5
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:708

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

2

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

3

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Virtualization/Sandbox Evasion

2