Analysis
- max time kernel
150s - max time network
158s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - resource tags
- submitted
18/07/2022, 19:22
General
- Target 50e7151755978244b96e5d46af62d831ab3b710e6ea65785feec36d0fde9e5b9.exe
- Size 2.3MB
- Sample220718-x3bedafeal
- SHA256 50e7151755978244b96e5d46af62d831ab3b710e6ea65785feec36d0fde9e5b9
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.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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.
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- 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.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of FindShellTrayWindow 12 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\50e7151755978244b96e5d46af62d831ab3b710e6ea65785feec36d0fde9e5b9.exe"C:\Users\Admin\AppData\Local\Temp\50e7151755978244b96e5d46af62d831ab3b710e6ea65785feec36d0fde9e5b9.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks computer location settings
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c rd /s /q C:\ProgramData\uyR70nR6q & timeout 2 & del /f /q "C:\Users\Admin\AppData\Local\Temp\50e7151755978244b96e5d46af62d831ab3b710e6ea65785feec36d0fde9e5b9.exe"2⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\timeout.exetimeout 23⤵
- Delays execution with timeout.exe
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
47283761.txt
_FILEC~1.TXT
_Info.txt
_Screen.jpg
MOZ_CO~1.DB
RMOHMS~1.ZIP
memory/2840-134-0x00000000770F0000-0x0000000077293000-memory.dmp
memory/2840-138-0x00000000770F0000-0x0000000077293000-memory.dmp
memory/2840-137-0x0000000000C00000-0x000000000117A000-memory.dmp
memory/2840-135-0x0000000000C00000-0x000000000117A000-memory.dmp
memory/2840-130-0x0000000000C00000-0x000000000117A000-memory.dmp
memory/2840-133-0x0000000000C00000-0x000000000117A000-memory.dmp
memory/2840-132-0x0000000000C00000-0x000000000117A000-memory.dmp
memory/2840-131-0x00000000770F0000-0x0000000077293000-memory.dmp