Analysis

  • max time kernel
    92s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-06-2024 01:35

General

  • Target

    3ab231d18be903a1364b8ed968ee9ac3fe1a82bb75235ec8e7088b76b87b518a.exe

  • Size

    416KB

  • MD5

    3e54245fb579c525a1ee9f8830a12194

  • SHA1

    ccc3d6422f19b824051841eb58698536a8f223d7

  • SHA256

    3ab231d18be903a1364b8ed968ee9ac3fe1a82bb75235ec8e7088b76b87b518a

  • SHA512

    f0d6db9fea61aafa8a9c0b3ba25110bbc3ca9ae32e7cc5416872a6683f2dee6a5909f4f206f9c934f0e42711f4a88f8a3513214de7de74fcb18e8266b4714558

  • SSDEEP

    12288:RdkUBLHCIUDuVVCTh3pbB1r7Dt5r88s0CTEO:RdNhCIFVCTh3pb7rF5Dkt

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\3ab231d18be903a1364b8ed968ee9ac3fe1a82bb75235ec8e7088b76b87b518a.exe
    "C:\Users\Admin\AppData\Local\Temp\3ab231d18be903a1364b8ed968ee9ac3fe1a82bb75235ec8e7088b76b87b518a.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4508
    • 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:4272
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\HCFBFBAEBKJK" & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2192
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 10
          4⤵
          • Delays execution with timeout.exe
          PID:5688

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/4272-21-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4272-38-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4272-1-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4272-6-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4272-4-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4272-20-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4272-71-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4272-70-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4272-55-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4272-39-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4272-23-0x000000001B8D0000-0x000000001BB2F000-memory.dmp

    Filesize

    2.4MB

  • memory/4272-56-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4508-0-0x00000000003D0000-0x00000000003D1000-memory.dmp

    Filesize

    4KB

  • memory/4508-2-0x00000000003D0000-0x00000000003D1000-memory.dmp

    Filesize

    4KB