xworm | 883fc0b0feb4c295bdb723c9bb3817ee7c2c413f2e8b6ea961aa9173b065b930

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	CraxsRat v7.6.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

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

execution

PowerShell

T1059.001

pid	Process
1772	powershell.exe
2464	powershell.exe
4700	powershell.exe
2064	powershell.exe
3244	powershell.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	CraxsRat v7.6.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	CraxsRat v7.6.exe

Checks computer location settings 2 TTPs 3 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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	svchost.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	CraxsRat v7.6‌‌‌.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	taskhostw.exe

Drops startup file 3 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\taskhostw.lnk	taskhostw.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.exe.lnk	svchost.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\taskhostw.lnk	taskhostw.exe

Executes dropped EXE 4 IoCs

pid	Process
4568	CraxsRat v7.6.exe
5052	taskhostw.exe
2656	svchost.exe
1020	svchost.exe

Loads dropped DLL 1 IoCs

pid	Process
4568	CraxsRat v7.6.exe

Obfuscated with Agile.Net obfuscator 1 IoCs

Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

agilenet

resource	yara_rule
behavioral6/memory/4568-45-0x00000204CB260000-0x00000204CC2DC000-memory.dmp	agile_net

Themida packer 10 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral6/files/0x0007000000023ea4-34.dat	themida
behavioral6/memory/4568-37-0x0000000180000000-0x0000000181261000-memory.dmp	themida
behavioral6/memory/4568-40-0x0000000180000000-0x0000000181261000-memory.dmp	themida
behavioral6/memory/4568-42-0x0000000180000000-0x0000000181261000-memory.dmp	themida
behavioral6/memory/4568-41-0x0000000180000000-0x0000000181261000-memory.dmp	themida
behavioral6/memory/4568-43-0x0000000180000000-0x0000000181261000-memory.dmp	themida
behavioral6/memory/4568-110-0x0000000180000000-0x0000000181261000-memory.dmp	themida
behavioral6/memory/4568-162-0x0000000180000000-0x0000000181261000-memory.dmp	themida
behavioral6/memory/4568-205-0x0000000180000000-0x0000000181261000-memory.dmp	themida
behavioral6/memory/4568-214-0x0000000180000000-0x0000000181261000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	CraxsRat v7.6.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
4568	CraxsRat v7.6.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 6 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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.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
540	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

pid	Process
2560	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
5052	taskhostw.exe
1020	svchost.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3244	powershell.exe
3244	powershell.exe
1772	powershell.exe
1772	powershell.exe
2464	powershell.exe
2464	powershell.exe
4700	powershell.exe
4700	powershell.exe
5052	taskhostw.exe
2064	powershell.exe
2064	powershell.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	5052	taskhostw.exe
Token: SeDebugPrivilege	3244	powershell.exe
Token: SeDebugPrivilege	1772	powershell.exe
Token: SeDebugPrivilege	2464	powershell.exe
Token: SeDebugPrivilege	4700	powershell.exe
Token: SeDebugPrivilege	4568	CraxsRat v7.6.exe
Token: SeDebugPrivilege	2656	svchost.exe
Token: SeDebugPrivilege	2064	powershell.exe
Token: SeDebugPrivilege	1020	svchost.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4568	CraxsRat v7.6.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4568	CraxsRat v7.6.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5052	taskhostw.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3984 wrote to memory of 4568	3984	CraxsRat v7.6‌‌‌.exe	83
PID 3984 wrote to memory of 4568	3984	CraxsRat v7.6‌‌‌.exe	83
PID 3984 wrote to memory of 5052	3984	CraxsRat v7.6‌‌‌.exe	84
PID 3984 wrote to memory of 5052	3984	CraxsRat v7.6‌‌‌.exe	84
PID 5052 wrote to memory of 3244	5052	taskhostw.exe	85
PID 5052 wrote to memory of 3244	5052	taskhostw.exe	85
PID 5052 wrote to memory of 1772	5052	taskhostw.exe	87
PID 5052 wrote to memory of 1772	5052	taskhostw.exe	87
PID 5052 wrote to memory of 2464	5052	taskhostw.exe	89
PID 5052 wrote to memory of 2464	5052	taskhostw.exe	89
PID 5052 wrote to memory of 4700	5052	taskhostw.exe	91
PID 5052 wrote to memory of 4700	5052	taskhostw.exe	91
PID 3984 wrote to memory of 2656	3984	CraxsRat v7.6‌‌‌.exe	93
PID 3984 wrote to memory of 2656	3984	CraxsRat v7.6‌‌‌.exe	93
PID 3984 wrote to memory of 2656	3984	CraxsRat v7.6‌‌‌.exe	93
PID 2656 wrote to memory of 2064	2656	svchost.exe	100
PID 2656 wrote to memory of 2064	2656	svchost.exe	100
PID 2656 wrote to memory of 2064	2656	svchost.exe	100
PID 2656 wrote to memory of 2560	2656	svchost.exe	101
PID 2656 wrote to memory of 2560	2656	svchost.exe	101
PID 2656 wrote to memory of 2560	2656	svchost.exe	101
PID 2656 wrote to memory of 1020	2656	svchost.exe	110
PID 2656 wrote to memory of 1020	2656	svchost.exe	110
PID 2656 wrote to memory of 1020	2656	svchost.exe	110
PID 2656 wrote to memory of 1804	2656	svchost.exe	111
PID 2656 wrote to memory of 1804	2656	svchost.exe	111
PID 2656 wrote to memory of 1804	2656	svchost.exe	111
PID 1804 wrote to memory of 540	1804	cmd.exe	113
PID 1804 wrote to memory of 540	1804	cmd.exe	113
PID 1804 wrote to memory of 540	1804	cmd.exe	113

C:\Users\Admin\AppData\Local\Temp\CraxsRat v7.6‌‌‌\CraxsRat v7.6‌‌‌.exe
"C:\Users\Admin\AppData\Local\Temp\CraxsRat v7.6‌‌‌\CraxsRat v7.6‌‌‌.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3984
- C:\Users\Admin\AppData\Local\Temp\CraxsRat v7.6‌‌‌\CraxsRat v7.6.exe
  "C:\Users\Admin\AppData\Local\Temp\CraxsRat v7.6‌‌‌\CraxsRat v7.6.exe"
  2⤵
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks whether UAC is enabled
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:4568
- C:\Users\Admin\AppData\Roaming\taskhostw.exe
  "C:\Users\Admin\AppData\Roaming\taskhostw.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5052
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\taskhostw.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3244
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'taskhostw.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1772
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\taskhostw.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2464
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'taskhostw.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4700
- C:\ProgramData\svchost.exe
  "C:\ProgramData\svchost.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2656
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Windows Services'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2064
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /tn svchost.exe /tr "C:\Users\Admin\AppData\Local\Windows Services\svchost.exe" /st 18:08 /du 23:59 /sc daily /ri 1 /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2560
- - C:\Users\Admin\AppData\Local\Windows Services\svchost.exe
    "C:\Users\Admin\AppData\Local\Windows Services\svchost.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: AddClipboardFormatListener
    - Suspicious use of AdjustPrivilegeToken
    PID:1020
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp35C1.tmp.cmd""
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1804
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 6
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:540

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

Persistence

Scheduled Task/Job

T1053

Scheduled Task

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

System Information Discovery