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General
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Target
https://whatismybrowser.com/
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Sample
240802-fz299axhkp
Malware Config
Targets
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Target
https://whatismybrowser.com/
Score10/10-
Modifies WinLogon for persistence
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UAC bypass
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Disables RegEdit via registry modification
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Executes dropped EXE
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Loads dropped DLL
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Reads user/profile data of web browsers
Infostealers often target stored browser data, which can include saved credentials etc.
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System Binary Proxy Execution: Rundll32
Abuse Rundll32 to proxy execution of malicious code.
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Adds Run key to start application
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Drops desktop.ini file(s)
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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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Drops file in System32 directory
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Sets desktop wallpaper using registry
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Event Triggered Execution
2Accessibility Features
1Screensaver
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Event Triggered Execution
2Accessibility Features
1Screensaver
1Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Impair Defenses
1Disable or Modify Tools
1Modify Registry
5System Binary Proxy Execution
1Rundll32
1