Analysis

  • max time kernel
    133s
  • max time network
    103s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/05/2024, 13:58

General

  • Target

    file.exe

  • Size

    406KB

  • MD5

    ca9a95daa96005c43b2402094800081a

  • SHA1

    82d78d90972f4e7d3494ff9bab33e6b3d65b82ed

  • SHA256

    0260ea7f3ee2a5b7cc6d2b648d7850ec0f96b70674ab0f9386aa6d07f59d1274

  • SHA512

    b9093fb0ec4d1888a2c07630fe07ae1c28cd61289611a8965a8b1ab5c83a59fae9e690f1fd086290988250efb4e5dcd322ff5f355402863004c21ac0f05a22a1

  • SSDEEP

    6144:jSuxvfHBpjCvTorgayosTkSqaN5K2lsmYpK8SMqvWvbbr2DCXAckx64A1vgwt4:jSIBpjCvMUXSK8SMqvWTPwCXAsh1o84

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/ta904ek

https://steamcommunity.com/profiles/76561199695752269

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

  • Detect Vidar Stealer 11 IoCs
  • Stealc

    Stealc is an infostealer written in C++.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • 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.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 1 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1960
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      2⤵
        PID:2988
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
        2⤵
        • Checks computer location settings
        • Checks processor information in registry
        • Modifies system certificate store
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:4924
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\JKJEHJKJEBGH" & exit
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:3756
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 10
            4⤵
            • Delays execution with timeout.exe
            PID:1788

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/1960-3-0x0000000000C10000-0x0000000000C11000-memory.dmp

      Filesize

      4KB

    • memory/1960-0-0x0000000000C10000-0x0000000000C11000-memory.dmp

      Filesize

      4KB

    • memory/4924-11-0x0000000000400000-0x0000000000649000-memory.dmp

      Filesize

      2.3MB

    • memory/4924-7-0x0000000000400000-0x0000000000649000-memory.dmp

      Filesize

      2.3MB

    • memory/4924-5-0x0000000000400000-0x0000000000649000-memory.dmp

      Filesize

      2.3MB

    • memory/4924-10-0x0000000000400000-0x0000000000649000-memory.dmp

      Filesize

      2.3MB

    • memory/4924-1-0x0000000000400000-0x0000000000649000-memory.dmp

      Filesize

      2.3MB

    • memory/4924-13-0x000000001B2D0000-0x000000001B52F000-memory.dmp

      Filesize

      2.4MB

    • memory/4924-28-0x0000000000400000-0x0000000000649000-memory.dmp

      Filesize

      2.3MB

    • memory/4924-29-0x0000000000400000-0x0000000000649000-memory.dmp

      Filesize

      2.3MB

    • memory/4924-45-0x0000000000400000-0x0000000000649000-memory.dmp

      Filesize

      2.3MB

    • memory/4924-46-0x0000000000400000-0x0000000000649000-memory.dmp

      Filesize

      2.3MB

    • memory/4924-60-0x0000000000400000-0x0000000000649000-memory.dmp

      Filesize

      2.3MB

    • memory/4924-61-0x0000000000400000-0x0000000000649000-memory.dmp

      Filesize

      2.3MB