General
- Target boykisser.exe
- Size 1.5MB
- Sample260701-b7n1dab19p
- SHA256 26742d87cc980cc139521094d045f2f732a495431cf6d83757c3e29f34d6fa23
- MD5 19e63312d05b300aca57f65d0c133ac2
- SHA1 2a8970a6660eaa3d1d230e351fa9f25b28cbe471
- SHA512 20e9f383ee49896dc45a0d8db55be8df3b43822057a1c29740cd89d5cf5a01ebf1de04b27714f777a5a7c4d0d273306ec1e3acd3656f9136d1e8f6282a9f3c2c
- SSDEEP 24576:Ral5uHnESGtWAvp+loWgbY/v76cHpqkwD4VAJQW4NC75Rvl53Z813SWI:uoHnESaEW3M/v76cHpq5XP/lR63SW
- TLSH T18D7533C6C40C2AA7D1FCE7F3CABB65CADAD40C2721EA858451DBE9917C209C85867E74
- 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 1.5MB
- SHA256 26742d87cc980cc139521094d045f2f732a495431cf6d83757c3e29f34d6fa23
- MD5 19e63312d05b300aca57f65d0c133ac2
- SHA1 2a8970a6660eaa3d1d230e351fa9f25b28cbe471
- SHA512 20e9f383ee49896dc45a0d8db55be8df3b43822057a1c29740cd89d5cf5a01ebf1de04b27714f777a5a7c4d0d273306ec1e3acd3656f9136d1e8f6282a9f3c2c
- SSDEEP 24576:Ral5uHnESGtWAvp+loWgbY/v76cHpqkwD4VAJQW4NC75Rvl53Z813SWI:uoHnESaEW3M/v76cHpq5XP/lR63SW
- TLSH T18D7533C6C40C2AA7D1FCE7F3CABB65CADAD40C2721EA858451DBE9917C209C85867E74
- 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
-
Badlisted process makes network request
Network request originating from process or tool commonly abused by malware.
-
Disables Task Manager via registry modification
-
Disables one or more Microsoft Defender components
Uses the Powershell Set-MpPreference cmdlet to disable one or more Microsoft Defender components.
-
Credentials from Password Stores: Windows Credential Manager
Suspicious access to Credentials History.
-
Disables service(s)
-
Stops running service(s)
-
Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
-
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.
-
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
Create or Modify System Process
4Windows Service
4Power Settings
1Pre-OS Boot
1Bootkit
1Defense Evasion
Direct Volume Access
1Impair Defenses
4Disable or Modify Tools
3Indicator Removal
3Clear Windows Event Logs
1File Deletion
2Modify Registry
4Obfuscated Files or Information
1Command Obfuscation
1Pre-OS Boot
1Bootkit
1