General
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Target
Bloxstrap-v2.7.0.exe
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Size
10.1MB
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Sample
241016-xazw9svgrb
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MD5
2c752edef5b0aa0962a3e01c4c82a2fa
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SHA1
9c3afd1c63f2b0dbdc2dc487709471222d2cb81e
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SHA256
891846bf656253ca1cdd28584a28681e9604e2a03d74cd6b99313e3bff11daf8
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SHA512
04d25fe7d40c8c320ffc545a038ad6ea458df6a8a552b0e0393b369a03b9bf273c72f30169bd54e8eb10757c04bdddf3859c601c1eb9e1a12fe4d15658906dfe
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SSDEEP
98304:TYd5DQd5Dk9Tsed5DogTrBKvGWD3nIOYoHwfLk3vSmaR0+Mc4AN0edaAHDfysrT4:Tasx3vG6IObAbN0T
Static task
static1
Behavioral task
behavioral1
Sample
Bloxstrap-v2.7.0.exe
Resource
win11-20241007-en
Malware Config
Targets
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Target
Bloxstrap-v2.7.0.exe
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Size
10.1MB
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MD5
2c752edef5b0aa0962a3e01c4c82a2fa
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SHA1
9c3afd1c63f2b0dbdc2dc487709471222d2cb81e
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SHA256
891846bf656253ca1cdd28584a28681e9604e2a03d74cd6b99313e3bff11daf8
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SHA512
04d25fe7d40c8c320ffc545a038ad6ea458df6a8a552b0e0393b369a03b9bf273c72f30169bd54e8eb10757c04bdddf3859c601c1eb9e1a12fe4d15658906dfe
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SSDEEP
98304:TYd5DQd5Dk9Tsed5DogTrBKvGWD3nIOYoHwfLk3vSmaR0+Mc4AN0edaAHDfysrT4:Tasx3vG6IObAbN0T
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Modifies WinLogon for persistence
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Suspicious use of NtCreateProcessExOtherParentProcess
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Suspicious use of NtCreateUserProcessOtherParentProcess
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Renames multiple (69) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Boot or Logon Autostart Execution: Active Setup
Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.
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Downloads MZ/PE file
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Drops file in Drivers directory
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Event Triggered Execution: Image File Execution Options Injection
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Modifies RDP port number used by Windows
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Sets service image path in registry
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Uses Session Manager for persistence
Creates Session Manager registry key to run executable early in system boot.
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Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Credentials from Password Stores: Windows Credential Manager
Suspicious access to Credentials History.
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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
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Impair Defenses: Safe Mode Boot
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Loads dropped DLL
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Adds Run key to start application
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Checks for any installed AV software in registry
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Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
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Legitimate hosting services abused for malware hosting/C2
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Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
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Boot or Logon Autostart Execution: Authentication Package
Suspicious Windows Authentication Registry Modification.
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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
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
6Active Setup
1Authentication Package
1Registry Run Keys / Startup Folder
3Winlogon Helper DLL
1Event Triggered Execution
2Component Object Model Hijacking
1Image File Execution Options Injection
1Pre-OS Boot
1Bootkit
1Privilege Escalation
Boot or Logon Autostart Execution
6Active Setup
1Authentication Package
1Registry Run Keys / Startup Folder
3Winlogon Helper DLL
1Event Triggered Execution
2Component Object Model Hijacking
1Image File Execution Options Injection
1Defense Evasion
Impair Defenses
2Disable or Modify Tools
1Safe Mode Boot
1Modify Registry
8Pre-OS Boot
1Bootkit
1Subvert Trust Controls
2Install Root Certificate
1SIP and Trust Provider Hijacking
1Credential Access
Credentials from Password Stores
2Credentials from Web Browsers
1Windows Credential Manager
1Unsecured Credentials
1Credentials In Files
1Discovery
Browser Information Discovery
1Peripheral Device Discovery
2Query Registry
9Software Discovery
1Security Software Discovery
1System Information Discovery
9System Location Discovery
1System Language Discovery
1System Network Configuration Discovery
1Internet Connection Discovery
1