Analysis
- max time kernel
151s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20220721-en - resource tags
- submitted
24/07/2022, 17:33
General
- Target a56a438d296e4d5ec107afb712040699ea02193eb66da7b75824af11566d45a7.exe
- Size 2.3MB
- Sample220724-v5bf2scfe8
- SHA256 a56a438d296e4d5ec107afb712040699ea02193eb66da7b75824af11566d45a7
Malware Config
Signatures
- CryptBot
A C++ stealer distributed widely in bundle with other software.
- 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.
- Identifies Wine through registry keys 2 TTPs 1 IoCs
Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of FindShellTrayWindow 12 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\a56a438d296e4d5ec107afb712040699ea02193eb66da7b75824af11566d45a7.exe"C:\Users\Admin\AppData\Local\Temp\a56a438d296e4d5ec107afb712040699ea02193eb66da7b75824af11566d45a7.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/372-131-0x0000000000920000-0x0000000000E96000-memory.dmp
memory/372-132-0x0000000077AF0000-0x0000000077C93000-memory.dmp
memory/372-133-0x0000000000920000-0x0000000000E96000-memory.dmp
memory/372-134-0x0000000000920000-0x0000000000E96000-memory.dmp
memory/372-135-0x0000000077AF0000-0x0000000077C93000-memory.dmp