General
- Target InstallerV29412x64.exe
- Size 15.8MB
- Sample260925-2khg7aybnc
- SHA256 e4eff0598023a539ffe527c32575c36e3357b5ef2a589a4b369eb1ab606ac67d
Malware Config
Targets
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- Target InstallerV29412x64.exe
- Size 15.8MB
- SHA256 e4eff0598023a539ffe527c32575c36e3357b5ef2a589a4b369eb1ab606ac67d
Score10/10-
Family: CNBackdoor
CNBackdoor aka CNB Bot is a backdoor that polls its C2 to download and execute additional malware.
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Enumerates VirtualBox registry keys
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Identifies VirtualBox via ACPI registry values (likely anti-VM)
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Looks for VirtualBox Guest Additions in registry
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Command and Scripting Interpreter: PowerShell
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
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Command and Scripting Interpreter: PowerShell
Run Powershell and hide display window.
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Looks for VMWare Tools registry key
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Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
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Creates a file in the Startup directory
A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.
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Executes a file named after a Windows system binary
The file runs from a user directory while carrying the name of an executable that normally only exists in System32.
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Executes dropped EXE
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Themida packer
Detects Themida, an advanced Windows software protection system.
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Checks whether UAC is enabled
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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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Suspicious use of NtSetInformationThreadHideFromDebugger
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
3PowerShell
2Windows Command Shell
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Defense Evasion
Debugger Evasion
1Masquerading
1Match Legitimate Name or Location
1Virtualization/Sandbox Evasion
4