Extracted

• • Target

    FunChecker.exe

  • Size

    6.6MB

  • MD5

    9dbb7c48ab076c5e10871f7b3266a579

  • SHA1

    cb5c067bbd48eb4b5b28641238bb99400caf1c2f

  • SHA256

    dbafb79e86af01c2dd0cb457e2c016b0cf1bdf3f206e9ec5b9b2c9d484f99bdf

  • SHA512

    498d76541df680c48290c6dcd7bda77b15750e31e1b3fb1c4bfe6ab99ad0aff3eeca367568e8aed37bb35d155fde3fe4c0e32256f0e092a2f43a6a47359ba3ca

  • SSDEEP

    196608:DwALGj59ddZCmZ4JAfd0qQv9N/BuAmISgLPwzYhjqK8pfPnYAmeViD:htmZ4O/Qtu1dmoz2jqK8VPYAjV2

  Score

  10^/10

  umbralbootkitevasionexecutionpersistencespywarestealertrojan

  • Detect Umbral payload

  • Modifies Windows Defender Real-time Protection settings

    evasiontrojan

  • Modifies security service

    evasion

  • Umbral

    Umbral stealer is an opensource moduler stealer written in C#.

    stealerumbral

  • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    evasion

  • Command and Scripting Interpreter: PowerShell

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    execution

  • Drops file in Drivers directory

  • Checks BIOS information in registry

    BIOS information is often read in order to detect sandboxing environments.

  • Drops startup file

  • Executes dropped EXE

  • Identifies Wine through registry keys

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

    evasion

  • Reads user/profile data of web browsers

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer

  • Adds Run key to start application

    persistence

  • Checks whether UAC is enabled

    evasiontrojan

  • Legitimate hosting services abused for malware hosting/C2

  • Looks up external IP address via web service

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Writes to the Master Boot Record (MBR)

    Bootkits write to the MBR to gain persistence at a level below the operating system.

    bootkitpersistence

  • Suspicious use of NtSetInformationThreadHideFromDebugger

  behavioral1