General
- Target castle.exe
- Size 2.8MB
- Sample260626-le3yyaaz2l
- SHA256 d3e1717b09df3c8e289c261cd984e04943d1bd0f6f33aea6bd2a1e935ff110ea
- MD5 a6ff79a27d8582e2f77489693704975a
- SHA1 fae2286f89a7c5f6c05266b827381c2fad8e22a9
- SHA512 68c691f13fe26146422efe1034402e8ba45c6c5ad7455dc87890a03ab58673dec6034e2f9ccde46a4b9dd56f232701a0a0f3ea7fa3dd1aa36d2c8668de98875d
- SSDEEP 49152:4sOgp5JMo3GGxGWZ0FfznHZzQ3PYBBTC9m2TX5W:TMo3lGq0FC3PqBT
- TLSH T14AD5272136E5C325F5F36AB09938E6EA0429BD612F7494CF52C47E5F39709C28A31B63
- MD5 SHA1 SHA512 SSDEEP TLSH
Static task
static1
Behavioral task
behavioral1
Sample
castle.exe
Resource
win10v2004-20260513-en
Behavioral task
behavioral2
Sample
castle.exe
Resource
win11ltsc2024-20260617-en
Malware Config
Targets
-
- Target castle.exe
- Size 2.8MB
- SHA256 d3e1717b09df3c8e289c261cd984e04943d1bd0f6f33aea6bd2a1e935ff110ea
- MD5 a6ff79a27d8582e2f77489693704975a
- SHA1 fae2286f89a7c5f6c05266b827381c2fad8e22a9
- SHA512 68c691f13fe26146422efe1034402e8ba45c6c5ad7455dc87890a03ab58673dec6034e2f9ccde46a4b9dd56f232701a0a0f3ea7fa3dd1aa36d2c8668de98875d
- SSDEEP 49152:4sOgp5JMo3GGxGWZ0FfznHZzQ3PYBBTC9m2TX5W:TMo3lGq0FC3PqBT
- TLSH T14AD5272136E5C325F5F36AB09938E6EA0429BD612F7494CF52C47E5F39709C28A31B63
- MD5 SHA1 SHA512 SSDEEP TLSH
-
Suspicious use of NtCreateProcessExOtherParentProcess
-
Downloads MZ/PE file
-
Drops file in Drivers directory
-
Sets service image path in registry
This determines the executable launched when a service starts. It can be used to establish persistence.
-
Uses Session Manager for persistence
Creates Session Manager registry key to run executable early in system boot.
-
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
-
Event Triggered Execution: Component Object Model Hijacking
Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.
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Executes dropped EXE
-
Impair Defenses: Safe Mode Boot
-
Loads dropped DLL
-
Modifies file permissions
-
Stops running service(s)
-
Windows security modification
-
Adds Run key to start application
-
Checks for any installed AV software in registry
-
Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
-
Drops Chrome extension
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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
-
Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
-
Drops file in System32 directory
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
3Registry Run Keys / Startup Folder
3Create or Modify System Process
2Windows Service
2Event Triggered Execution
1Component Object Model Hijacking
1Pre-OS Boot
1Bootkit
1Privilege Escalation
Access Token Manipulation
1Create Process with Token
1Boot or Logon Autostart Execution
3Registry Run Keys / Startup Folder
3Create or Modify System Process
2Windows Service
2Event Triggered Execution
1Component Object Model Hijacking
1Defense Evasion
Access Token Manipulation
1Create Process with Token
1File and Directory Permissions Modification
1Impair Defenses
3Disable or Modify Tools
1Safe Mode Boot
1Modify Registry
6Pre-OS Boot
1Bootkit
1Subvert Trust Controls
1Install Root Certificate
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1Discovery
Browser Information Discovery
1Peripheral Device Discovery
2Query Registry
7Software Discovery
1Security Software Discovery
1System Information Discovery
6System Location Discovery
1System Language Discovery
1System Network Configuration Discovery
1Internet Connection Discovery
1System Time Discovery
1