General
- Target Installer.iso
- Size 16.2MB
- Sample261007-e54jtssse1
- SHA256 29ab58d7ef08f98ba4cb0e20b0989eb8460c6247283c530d41bc9dcf67a9e711
Malware Config
Targets
-
- Target Installer21691x64.exe
- Size 16.1MB
- SHA256 749009376b352dfd21f7289f549c0ed3ff515f813eb1eaf2e604ba75be02c9c2
Score10/10-
Family: CNBackdoor
CNBackdoor aka CNB Bot is a backdoor that polls its C2 to download and execute additional malware.
-
Enumerates VirtualBox registry keys
-
Identifies VirtualBox via ACPI registry values (likely anti-VM)
-
Looks for VirtualBox Guest Additions in registry
-
Command and Scripting Interpreter: PowerShell
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
-
Command and Scripting Interpreter: PowerShell
Run Powershell and hide display window.
-
Looks for VMWare Tools registry key
-
Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
-
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.
-
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.
-
Executes dropped EXE
-
Themida packer
Detects Themida, an advanced Windows software protection system.
-
Checks whether UAC is enabled
-
Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
-
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