Analysis
- user interaction
yes - max time kernel
298s - max time network
160s - platform
windows10-2004_x64 - resource
win10v2004-20260911-en - resource tags
- submitted
07/11/2026, 18:46
General
- Target Chimera-setup.exe
- Size 33.5MB
- Sample261107-xeqjdset7y
- SHA256 4d534abb91cbafed0bd49abce72007d54303168caed0823b32565d9648bbf624
Malware Config
Signatures
- Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- Executes dropped EXE 2 IoCs
- Loads dropped DLL 1 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Checks whether UAC is enabled 1 TTPs 1 IoCs
- Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
- Suspicious use of NtSetInformationThreadHideFromDebugger 1 TTPs 1 IoCs
- Direct Volume Access: Opens a physical disk for reading 1 TTPs 2 IoCs
Opens a raw handle to a physical disk, which bypasses file system access controls and is used for disk inspection, anti-VM checks and privilege checks.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Modifies registry class 7 IoCs
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of WriteProcessMemory 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Chimera-setup.exe"C:\Users\Admin\AppData\Local\Temp\Chimera-setup.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\chimera-installer-89d69369-66d1-4db0-a737-fd2d3597641c\engine.exe"C:\Users\Admin\AppData\Local\Temp\chimera-installer-89d69369-66d1-4db0-a737-fd2d3597641c\engine.exe" /S /DESKTOP_SHORTCUT /D=C:\Users\Admin\AppData\Local\Programs\Chimera2⤵
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
-
-
C:\Users\Admin\AppData\Local\Programs\Chimera\Chimera.exe"C:\Users\Admin\AppData\Local\Programs\Chimera\Chimera.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Checks whether UAC is enabled
- Writes to the Master Boot Record (MBR)
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Direct Volume Access: Opens a physical disk for reading
- Modifies registry class
Network
MITRE ATT&CK Enterprise v16
Defense Evasion
Debugger Evasion
1Direct Volume Access
1Pre-OS Boot
1Bootkit
1Virtualization/Sandbox Evasion
1Replay Monitor
Loading Replay Monitor...
Downloads
.chimera-install
.chimera-transaction.ini
.chimera-transaction.ini.pending
.chimera-transaction.ini.pending
Chimera.exe
Cleanup.exe
chimera-decompiler.exe
engine.exe
System.dll
memory/1776-83-0x0000000140000000-0x00000001438B1000-memory.dmp
memory/1776-88-0x0000000140000000-0x00000001438B1000-memory.dmp
memory/1776-89-0x0000000140000000-0x00000001438B1000-memory.dmp
memory/1776-90-0x0000000140000000-0x00000001438B1000-memory.dmp
memory/1776-91-0x0000000140000000-0x00000001438B1000-memory.dmp
memory/1776-87-0x0000000140000000-0x00000001438B1000-memory.dmp
memory/1776-92-0x0000000140000000-0x00000001438B1000-memory.dmp