Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/03/2024, 10:19

General

  • Target
    virussign.com_a5c79c967bf084953175d09c2fb51248.exe
  • Size 1.6MB
  • Sample240303-mcg45ahe38
  • SHA256 98d891eb44667ba96e6a6bbfb70101240bbece978f94a4225c05de9b9bdf5cb9
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Detects executables containing possible sandbox analysis VM usernames 18 IoCs
  • UPX dump on OEP (original entry point) 20 IoCs
  • Checks computer location settings 2 TTPs 2 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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in System32 directory 12 IoCs
  • Drops file in Program Files directory 19 IoCs
  • Drops file in Windows directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\virussign.com_a5c79c967bf084953175d09c2fb51248.exe
    "C:\Users\Admin\AppData\Local\Temp\virussign.com_a5c79c967bf084953175d09c2fb51248.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Enumerates connected drives
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2620
    • C:\Users\Admin\AppData\Local\Temp\virussign.com_a5c79c967bf084953175d09c2fb51248.exe
      "C:\Users\Admin\AppData\Local\Temp\virussign.com_a5c79c967bf084953175d09c2fb51248.exe"
      2⤵
      • Checks computer location settings
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4740
      • C:\Users\Admin\AppData\Local\Temp\virussign.com_a5c79c967bf084953175d09c2fb51248.exe
        "C:\Users\Admin\AppData\Local\Temp\virussign.com_a5c79c967bf084953175d09c2fb51248.exe"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:3164
    • C:\Users\Admin\AppData\Local\Temp\virussign.com_a5c79c967bf084953175d09c2fb51248.exe
      "C:\Users\Admin\AppData\Local\Temp\virussign.com_a5c79c967bf084953175d09c2fb51248.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      PID:368

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        tyrkish nude trambling [milf] feet (Ashley,Sylvia).mpeg.exe

        • Path C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX86\Microsoft Shared\tyrkish nude trambling [milf] feet (Ashley,Sylvia).mpeg.exe
        • Size 1.1MB
        • SHA256 60a05e3d387a0b626ab84abf4d4b4f5fea7162a4466874d61f2953be5955c051
        • MD5 SHA1 SHA512 SSDEEP

        memory/368-96-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/2620-203-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/2620-208-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/2620-249-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/2620-168-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/2620-190-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/2620-191-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/2620-195-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/2620-199-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/2620-0-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/2620-245-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/2620-212-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/2620-218-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/2620-228-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/2620-232-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/2620-236-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/2620-241-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/3164-97-0x0000000000400000-0x000000000041C000-memory.dmp

        memory/4740-11-0x0000000000400000-0x000000000041C000-memory.dmp