Analysis
- max time kernel
91s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
24/10/2022, 08:34
General
- Target library.exe
- Size 3.4MB
- Sample221024-kgf2hsfec4
- SHA256 f1d76f93fe7eee3f845d8b849054d5f268616734c10c941977c5b3e3017a295c
Malware Config
Extracted
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cryptbot
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[<
Signatures
- CryptBot
A C++ stealer distributed widely in bundle with other software.
- Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs
- Executes dropped EXE 2 IoCs
- Checks BIOS information in registry 2 TTPs 4 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.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Themida packer 13 IoCs
Detects Themida, an advanced Windows software protection system.
- 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.
- Checks whether UAC is enabled 1 TTPs 2 IoCs
- Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 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 3 IoCs
Processor information is often read in order to detect sandboxing environments.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: AddClipboardFormatListener 1 IoCs
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious use of WriteProcessMemory 15 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\library.exe"C:\Users\Admin\AppData\Local\Temp\library.exe"1⤵
- Checks computer location settings
- Maps connected drives based on registry
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c C:\Users\Admin\AppData\Roaming\A3A745C586DC263D\helmed.exe2⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\A3A745C586DC263D\helmed.exeC:\Users\Admin\AppData\Roaming\A3A745C586DC263D\helmed.exe3⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Executes dropped EXE
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe"C:\Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe"4⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Executes dropped EXE
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: AddClipboardFormatListener
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout -t 5 && del "C:\Users\Admin\AppData\Local\Temp\library.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout -t 53⤵
- Delays execution with timeout.exe
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
helmed.exe
helmed.exe
DpEditor.exe
DpEditor.exe
memory/872-143-0x0000000077520000-0x00000000776C3000-memory.dmp
memory/872-142-0x0000000000400000-0x0000000000AD5000-memory.dmp
memory/872-147-0x0000000077520000-0x00000000776C3000-memory.dmp
memory/872-141-0x0000000000400000-0x0000000000AD5000-memory.dmp
memory/872-148-0x0000000000400000-0x0000000000AD5000-memory.dmp
memory/872-150-0x0000000077520000-0x00000000776C3000-memory.dmp
memory/920-135-0x00000000027C0000-0x000000000287F000-memory.dmp
memory/920-132-0x00000000027C0000-0x000000000287F000-memory.dmp
memory/4180-149-0x00000000001D0000-0x00000000008A5000-memory.dmp
memory/4180-151-0x00000000001D0000-0x00000000008A5000-memory.dmp
memory/4180-152-0x00000000001D0000-0x00000000008A5000-memory.dmp
memory/4180-153-0x00000000001D0000-0x00000000008A5000-memory.dmp
memory/4180-154-0x00000000001D0000-0x00000000008A5000-memory.dmp
memory/4180-155-0x0000000077520000-0x00000000776C3000-memory.dmp
memory/4180-156-0x00000000001D0000-0x00000000008A5000-memory.dmp
memory/4180-157-0x0000000077520000-0x00000000776C3000-memory.dmp