Analysis
- max time kernel
152s - max time network
164s - platform
windows7_x64 - resource
win7-20220715-en - submitted
31/07/2022, 11:42
General
- Target 835002f99b229e4c2c71f5c0a3760584ed45dd39c6220b0f14dbf232a123e175.exe
- Size 4.2MB
- Sample220731-nvb69sece5
- SHA256 835002f99b229e4c2c71f5c0a3760584ed45dd39c6220b0f14dbf232a123e175
Malware Config
Extracted
-
cryptbot
-
newyaer01.top
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
- Executes dropped EXE 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.
- Loads dropped DLL 4 IoCs
- 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
- Drops file in Program Files directory 3 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 1 IoCs
- Suspicious use of FindShellTrayWindow 12 IoCs
- Suspicious use of WriteProcessMemory 7 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\835002f99b229e4c2c71f5c0a3760584ed45dd39c6220b0f14dbf232a123e175.exe"C:\Users\Admin\AppData\Local\Temp\835002f99b229e4c2c71f5c0a3760584ed45dd39c6220b0f14dbf232a123e175.exe"1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
-
C:\Program Files (x86)\New Year\Setup.exe"C:\Program Files (x86)\New Year\Setup.exe"2⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Executes dropped EXE
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Loads dropped DLL
- 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
Setup.exe
Setup.exe
Setup.exe
Setup.exe
Setup.exe
UAC.dll
memory/1364-65-0x0000000001320000-0x000000000185E000-memory.dmp
memory/1364-70-0x0000000000DE0000-0x000000000131E000-memory.dmp
memory/1364-84-0x00000000743B1000-0x00000000743B3000-memory.dmp
memory/1364-64-0x0000000000DE0000-0x000000000131E000-memory.dmp
memory/1364-83-0x0000000074710000-0x000000007487F000-memory.dmp
memory/1364-66-0x0000000001320000-0x000000000185E000-memory.dmp
memory/1364-67-0x0000000077AB0000-0x0000000077C30000-memory.dmp
memory/1364-68-0x0000000000DE0000-0x000000000131E000-memory.dmp
memory/1364-69-0x0000000074711000-0x0000000074713000-memory.dmp
memory/1364-71-0x0000000001320000-0x000000000185E000-memory.dmp
memory/1364-72-0x0000000077AB0000-0x0000000077C30000-memory.dmp
memory/1364-73-0x0000000074511000-0x0000000074513000-memory.dmp
memory/1364-74-0x0000000000DE0000-0x000000000131E000-memory.dmp
memory/1364-77-0x0000000074710000-0x000000007487F000-memory.dmp
memory/1984-54-0x0000000076261000-0x0000000076263000-memory.dmp
memory/1984-57-0x00000000027B0000-0x0000000002CEE000-memory.dmp