Analysis

  • max time kernel
    93s
  • max time network
    95s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-06-2024 06:55

General

  • Target

    5f2104232bfacfbad61fc2f509758069cbeab12f5082f7927659ddbccbcce828.exe

  • Size

    402KB

  • MD5

    6b0ed984f58e5bf958aa797ca37b2770

  • SHA1

    4cf2f8ffea5c4edb12a6276ab32b1070ee68b0aa

  • SHA256

    5f2104232bfacfbad61fc2f509758069cbeab12f5082f7927659ddbccbcce828

  • SHA512

    4a9ba5d98da78d66d166ce84e27e9917164f877215d07567c6133c1f8bbab27e0ca7637ab5fe9102edd9c673c2e580b8e84da6e2d3e1d6751ddc3f3ff5a53e55

  • SSDEEP

    12288:DCWEasOaXz2Lgg18JaW70J3iw3iC5yBxdUC:WJahaDQb8JaU0gP+yBxa

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
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5f2104232bfacfbad61fc2f509758069cbeab12f5082f7927659ddbccbcce828.exe
    "C:\Users\Admin\AppData\Local\Temp\5f2104232bfacfbad61fc2f509758069cbeab12f5082f7927659ddbccbcce828.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4076
    • 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
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3088
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\DAKJDHIEBFII" & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4816
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 10
          4⤵
          • Delays execution with timeout.exe
          PID:1896

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/3088-10-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/3088-27-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/3088-1-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/3088-4-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/3088-6-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/3088-9-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/3088-60-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/3088-59-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/3088-44-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/3088-28-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/3088-12-0x000000001B240000-0x000000001B49F000-memory.dmp

    Filesize

    2.4MB

  • memory/3088-45-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4076-0-0x0000000001510000-0x0000000001511000-memory.dmp

    Filesize

    4KB

  • memory/4076-2-0x0000000001510000-0x0000000001511000-memory.dmp

    Filesize

    4KB