xloader | 00094c5f5f67e1a091ddbdf88ea507bae9ee4bdb06a0306e27ba4b9285c6e13b

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Oracle\VirtualBox Guest Additions	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe

Xloader payload 4 IoCs

rat

resource	yara_rule
behavioral2/memory/2364-8-0x0000000000400000-0x000000000042A000-memory.dmp	xloader
behavioral2/memory/2364-11-0x0000000000400000-0x000000000042A000-memory.dmp	xloader
behavioral2/memory/2364-18-0x0000000000400000-0x000000000042A000-memory.dmp	xloader
behavioral2/memory/2264-24-0x0000000000E90000-0x0000000000EB9000-memory.dmp	xloader

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	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.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	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.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 opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1048 set thread context of 2364	1048	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe	83
PID 2364 set thread context of 3488	2364	mstsc.exe	56
PID 2364 set thread context of 3488	2364	mstsc.exe	56
PID 2264 set thread context of 3488	2264	chkdsk.exe	56

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	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mstsc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chkdsk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1048	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe
1048	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe
1048	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe
1048	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe
1048	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe
1048	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe
1048	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe
1048	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe
2364	mstsc.exe
2364	mstsc.exe
2364	mstsc.exe
2364	mstsc.exe
1048	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe
1048	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe
2364	mstsc.exe
2364	mstsc.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe
2264	chkdsk.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
2364	mstsc.exe
2364	mstsc.exe
2364	mstsc.exe
2364	mstsc.exe
2264	chkdsk.exe
2264	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1048	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe
Token: SeDebugPrivilege	2364	mstsc.exe
Token: SeDebugPrivilege	2264	chkdsk.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1048 wrote to memory of 2364	1048	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe	83
PID 1048 wrote to memory of 2364	1048	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe	83
PID 1048 wrote to memory of 2364	1048	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe	83
PID 1048 wrote to memory of 2364	1048	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe	83
PID 1048 wrote to memory of 2364	1048	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe	83
PID 1048 wrote to memory of 2364	1048	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe	83
PID 1048 wrote to memory of 2364	1048	00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe	83
PID 3488 wrote to memory of 2264	3488	Explorer.EXE	86
PID 3488 wrote to memory of 2264	3488	Explorer.EXE	86
PID 3488 wrote to memory of 2264	3488	Explorer.EXE	86
PID 2264 wrote to memory of 3144	2264	chkdsk.exe	90
PID 2264 wrote to memory of 3144	2264	chkdsk.exe	90
PID 2264 wrote to memory of 3144	2264	chkdsk.exe	90

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:3488
- C:\Users\Admin\AppData\Local\Temp\00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe
  "C:\Users\Admin\AppData\Local\Temp\00094C5F5F67E1A091DDBDF88EA507BAE9EE4BDB06A0306E27BA4B9285C6E13B.exe"
  2⤵
  - Looks for VirtualBox Guest Additions in registry
  - Looks for VMWare Tools registry key
  - Checks BIOS information in registry
  - Maps connected drives based on registry
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1048
- - C:\Windows\SysWOW64\mstsc.exe
    "C:\Windows\SysWOW64\mstsc.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2364
- C:\Windows\SysWOW64\autochk.exe
  "C:\Windows\SysWOW64\autochk.exe"
  2⤵
  PID:2844
- C:\Windows\SysWOW64\autochk.exe
  "C:\Windows\SysWOW64\autochk.exe"
  2⤵
  PID:3552
- C:\Windows\SysWOW64\chkdsk.exe
  "C:\Windows\SysWOW64\chkdsk.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Enumerates system info in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2264
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\SysWOW64\mstsc.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3144

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

System Information Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion