xloader | 6219d3d351b074f3015edd7e1d9a96a7a6b969deb1c8642c1e5f5f99c73af6a8

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Oracle\VirtualBox Guest Additions	RFQ0473838383.exe

Xloader payload 3 IoCs

rat

resource	yara_rule
behavioral2/memory/2208-17-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral2/memory/2208-24-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral2/memory/760-71-0x0000000000B70000-0x0000000000B99000-memory.dmp	xloader

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2632	powershell.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	RFQ0473838383.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	RFQ0473838383.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	RFQ0473838383.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	RFQ0473838383.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	RFQ0473838383.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	RFQ0473838383.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3252 set thread context of 2208	3252	RFQ0473838383.exe	93
PID 2208 set thread context of 3428	2208	RFQ0473838383.exe	56
PID 760 set thread context of 3428	760	cscript.exe	56

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	RFQ0473838383.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cscript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 44 IoCs

pid	Process
2632	powershell.exe
2208	RFQ0473838383.exe
2208	RFQ0473838383.exe
2208	RFQ0473838383.exe
2208	RFQ0473838383.exe
2632	powershell.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe
760	cscript.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2208	RFQ0473838383.exe
2208	RFQ0473838383.exe
2208	RFQ0473838383.exe
760	cscript.exe
760	cscript.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2632	powershell.exe
Token: SeDebugPrivilege	2208	RFQ0473838383.exe
Token: SeDebugPrivilege	760	cscript.exe
Token: SeShutdownPrivilege	3428	Explorer.EXE
Token: SeCreatePagefilePrivilege	3428	Explorer.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3252 wrote to memory of 2632	3252	RFQ0473838383.exe	91
PID 3252 wrote to memory of 2632	3252	RFQ0473838383.exe	91
PID 3252 wrote to memory of 2632	3252	RFQ0473838383.exe	91
PID 3252 wrote to memory of 2208	3252	RFQ0473838383.exe	93
PID 3252 wrote to memory of 2208	3252	RFQ0473838383.exe	93
PID 3252 wrote to memory of 2208	3252	RFQ0473838383.exe	93
PID 3252 wrote to memory of 2208	3252	RFQ0473838383.exe	93
PID 3252 wrote to memory of 2208	3252	RFQ0473838383.exe	93
PID 3252 wrote to memory of 2208	3252	RFQ0473838383.exe	93
PID 3428 wrote to memory of 760	3428	Explorer.EXE	95
PID 3428 wrote to memory of 760	3428	Explorer.EXE	95
PID 3428 wrote to memory of 760	3428	Explorer.EXE	95
PID 760 wrote to memory of 392	760	cscript.exe	96
PID 760 wrote to memory of 392	760	cscript.exe	96
PID 760 wrote to memory of 392	760	cscript.exe	96

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3428
- C:\Users\Admin\AppData\Local\Temp\RFQ0473838383.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ0473838383.exe"
  2⤵
  - Looks for VirtualBox Guest Additions in registry
  - Looks for VMWare Tools registry key
  - Checks BIOS information in registry
  - Checks computer location settings
  - Maps connected drives based on registry
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3252
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\RFQ0473838383.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2632
- - C:\Users\Admin\AppData\Local\Temp\RFQ0473838383.exe
    "C:\Users\Admin\AppData\Local\Temp\RFQ0473838383.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2208
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:3748
- C:\Windows\SysWOW64\cscript.exe
  "C:\Windows\SysWOW64\cscript.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:760
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\RFQ0473838383.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:392

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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