General
- Target boykisser.exe
- Size 3.7MB
- Sample260629-trbdfshw3t
- SHA256 5309581fb2e70135caea7cdfbb84ca6da98f313795e090a2d9727315eb26323a
- MD5 9afb4ec6d09a982d09da4adf5dc7590f
- SHA1 87bafb1de49a7ec95ae0bf0591f3b115051934c6
- SHA512 08be9b05b12fce19f9f1277b707dda9368149beb4a0da597eb6fb379756956df8d9dc7b0803cfe16431aceb8b62fe984522fa60517ef25d4118d5289950de419
- SSDEEP 49152:7GjbwbGaVCMUWsFao6Lnyj1Jk3hrQdfioSfivzsk12pr5DtFdDhNgfotZi:nCaVXUhFaoeyhUrQbSfivHmr5DtrAoH
- TLSH T1D5063352146F81DBD16598BBFBB0FD22CF73B7601D625191392B92289EA43B639303D3
- MD5 SHA1 SHA512 SSDEEP TLSH
Behavioral task
behavioral1
Sample
boykisser.exe
Resource
win10v2004-20260513-en
Behavioral task
behavioral2
Sample
boykisser.exe
Resource
win11ltsc2024-20260629-en
Malware Config
Targets
-
- Target boykisser.exe
- Size 3.7MB
- SHA256 5309581fb2e70135caea7cdfbb84ca6da98f313795e090a2d9727315eb26323a
- MD5 9afb4ec6d09a982d09da4adf5dc7590f
- SHA1 87bafb1de49a7ec95ae0bf0591f3b115051934c6
- SHA512 08be9b05b12fce19f9f1277b707dda9368149beb4a0da597eb6fb379756956df8d9dc7b0803cfe16431aceb8b62fe984522fa60517ef25d4118d5289950de419
- SSDEEP 49152:7GjbwbGaVCMUWsFao6Lnyj1Jk3hrQdfioSfivzsk12pr5DtFdDhNgfotZi:nCaVXUhFaoeyhUrQbSfivHmr5DtrAoH
- TLSH T1D5063352146F81DBD16598BBFBB0FD22CF73B7601D625191392B92289EA43B639303D3
- MD5 SHA1 SHA512 SSDEEP TLSH
-
Modifies Windows Defender Real-time Protection settings
-
Clears Windows event logs
-
Deletes shadow copies
Ransomware often targets backup files to inhibit system recovery.
-
Modifies boot configuration data using bcdedit
-
Disables one or more Microsoft Defender components
Uses the Powershell Set-MpPreference cmdlet to disable one or more Microsoft Defender components.
-
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
-
Disables service(s)
-
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.
-
Executes dropped EXE
-
Loads dropped DLL
-
Modifies system executable filetype association
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Stops running service(s)
-
Adds Run key to start application
-
Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
-
Obfuscated Files or Information: Command Obfuscation
Adversaries may obfuscate content during command execution to impede detection.
-
Power Settings
powercfg controls all configurable power system settings on a Windows system and can be abused to prevent an infected host from locking or shutting down.
-
Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
-
Checks system information in the registry
System information is often read in order to detect sandboxing environments.
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Drops file in System32 directory
-
Sets desktop wallpaper using registry
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
1PowerShell
1System Services
2Service Execution
2Windows Management Instrumentation
1Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
4Windows Service
4Event Triggered Execution
2Change Default File Association
1Component Object Model Hijacking
1Power Settings
1Pre-OS Boot
1Bootkit
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
4Windows Service
4Event Triggered Execution
2Change Default File Association
1Component Object Model Hijacking
1Defense Evasion
Direct Volume Access
1Impair Defenses
4Disable or Modify Tools
3Indicator Removal
3Clear Windows Event Logs
1File Deletion
2Modify Registry
7Obfuscated Files or Information
1Command Obfuscation
1Pre-OS Boot
1Bootkit
1