Analysis
- max time kernel
146s - max time network
156s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
25/06/2022, 01:38
General
- Target a7c197851b0d857569e0f4711d965bfdf3da7da820ea95caa6ee1317e9f8602d.exe
- Size 4.0MB
- Sample220625-b2dbpabef4
- SHA256 a7c197851b0d857569e0f4711d965bfdf3da7da820ea95caa6ee1317e9f8602d
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
- 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 1 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 5 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
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\a7c197851b0d857569e0f4711d965bfdf3da7da820ea95caa6ee1317e9f8602d.exe"C:\Users\Admin\AppData\Local\Temp\a7c197851b0d857569e0f4711d965bfdf3da7da820ea95caa6ee1317e9f8602d.exe"1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
-
C:\Program Files (x86)\Cyper\Setup.exe"C:\Program Files (x86)\Cyper\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
- 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
UAC.dll
memory/5108-134-0x0000000000D00000-0x0000000001252000-memory.dmp
memory/5108-135-0x0000000077580000-0x0000000077723000-memory.dmp
memory/5108-136-0x0000000000D00000-0x0000000001252000-memory.dmp
memory/5108-137-0x0000000000D00000-0x0000000001252000-memory.dmp
memory/5108-138-0x0000000077580000-0x0000000077723000-memory.dmp
memory/5108-139-0x0000000000D00000-0x0000000001252000-memory.dmp