xloader | 70974bd6d34d52bf57b2c332540f80ad80c0b4b0b3fde33551d618fe2829193f

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Oracle\VirtualBox Guest Additions	PDF_Scan-AWB#5305323204640.exe

Xloader payload 5 IoCs

rat

resource	yara_rule
behavioral1/memory/2768-8-0x0000000000400000-0x0000000000453000-memory.dmp	xloader
behavioral1/memory/2768-12-0x0000000000400000-0x0000000000453000-memory.dmp	xloader
behavioral1/memory/2768-16-0x0000000000400000-0x0000000000453000-memory.dmp	xloader
behavioral1/memory/2768-21-0x0000000000400000-0x0000000000453000-memory.dmp	xloader
behavioral1/memory/2808-28-0x00000000000C0000-0x00000000000E9000-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	PDF_Scan-AWB#5305323204640.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

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	PDF_Scan-AWB#5305323204640.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	PDF_Scan-AWB#5305323204640.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

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

Query Registry

defense_evasion privilege_escalation

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	PDF_Scan-AWB#5305323204640.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	PDF_Scan-AWB#5305323204640.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2404 set thread context of 2768	2404	PDF_Scan-AWB#5305323204640.exe	31
PID 2768 set thread context of 1156	2768	runas.exe	20
PID 2768 set thread context of 1156	2768	runas.exe	20
PID 2808 set thread context of 1156	2808	control.exe	20

Access Token Manipulation: Create Process with Token 1 TTPs 2 IoCs

Create Process with Token

T1134.002

pid	Process
2768	runas.exe
2800	cmd.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	PDF_Scan-AWB#5305323204640.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	runas.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	control.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 41 IoCs

pid	Process
2404	PDF_Scan-AWB#5305323204640.exe
2404	PDF_Scan-AWB#5305323204640.exe
2404	PDF_Scan-AWB#5305323204640.exe
2404	PDF_Scan-AWB#5305323204640.exe
2404	PDF_Scan-AWB#5305323204640.exe
2404	PDF_Scan-AWB#5305323204640.exe
2404	PDF_Scan-AWB#5305323204640.exe
2404	PDF_Scan-AWB#5305323204640.exe
2768	runas.exe
2768	runas.exe
2404	PDF_Scan-AWB#5305323204640.exe
2404	PDF_Scan-AWB#5305323204640.exe
2768	runas.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe
2808	control.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
2768	runas.exe
2768	runas.exe
2768	runas.exe
2768	runas.exe
2808	control.exe
2808	control.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2404	PDF_Scan-AWB#5305323204640.exe
Token: SeDebugPrivilege	2768	runas.exe
Token: SeDebugPrivilege	2808	control.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2404 wrote to memory of 2768	2404	PDF_Scan-AWB#5305323204640.exe	31
PID 2404 wrote to memory of 2768	2404	PDF_Scan-AWB#5305323204640.exe	31
PID 2404 wrote to memory of 2768	2404	PDF_Scan-AWB#5305323204640.exe	31
PID 2404 wrote to memory of 2768	2404	PDF_Scan-AWB#5305323204640.exe	31
PID 2404 wrote to memory of 2768	2404	PDF_Scan-AWB#5305323204640.exe	31
PID 2404 wrote to memory of 2768	2404	PDF_Scan-AWB#5305323204640.exe	31
PID 2404 wrote to memory of 2768	2404	PDF_Scan-AWB#5305323204640.exe	31
PID 2404 wrote to memory of 2768	2404	PDF_Scan-AWB#5305323204640.exe	31
PID 1156 wrote to memory of 2808	1156	Explorer.EXE	33
PID 1156 wrote to memory of 2808	1156	Explorer.EXE	33
PID 1156 wrote to memory of 2808	1156	Explorer.EXE	33
PID 1156 wrote to memory of 2808	1156	Explorer.EXE	33
PID 2808 wrote to memory of 2800	2808	control.exe	34
PID 2808 wrote to memory of 2800	2808	control.exe	34
PID 2808 wrote to memory of 2800	2808	control.exe	34
PID 2808 wrote to memory of 2800	2808	control.exe	34

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1156
- C:\Users\Admin\AppData\Local\Temp\PDF_Scan-AWB#5305323204640.exe
  "C:\Users\Admin\AppData\Local\Temp\PDF_Scan-AWB#5305323204640.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:2404
- - C:\Windows\SysWOW64\runas.exe
    "C:\Windows\SysWOW64\runas.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Access Token Manipulation: Create Process with Token
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2768
- C:\Windows\SysWOW64\control.exe
  "C:\Windows\SysWOW64\control.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:2808
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\SysWOW64\runas.exe"
    3⤵
    - Access Token Manipulation: Create Process with Token
    - System Location Discovery: System Language Discovery
    PID:2800

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Access Token Manipulation

T1134

Create Process with Token

T1134.002

Defense Evasion

Access Token Manipulation

T1134

Create Process with Token

T1134.002

Virtualization/Sandbox Evasion

2

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

2