Analysis

  • max time kernel
    190s
  • max time network
    300s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    03-06-2024 05:41

General

  • Target

    8d1073c24d6e764f960f9c3dd5fc7efc010c1be0a61218bba2be3d1356a69c9c.exe

  • Size

    2.0MB

  • MD5

    4f902d36f72af6d61eb15999c663f651

  • SHA1

    91de120f919a43b5132136d7854b68bd483c38a5

  • SHA256

    8d1073c24d6e764f960f9c3dd5fc7efc010c1be0a61218bba2be3d1356a69c9c

  • SHA512

    ecbe7d99412e6688d2660bd26b5b31349a9915ecc33c4d28e3e16d180670cb999c258dfed759a3dabae343bf5d4881b6f0c570bed9dcf59199b1dbda554915f1

  • SSDEEP

    49152:eqtdPVosJEAz/+VHA58ljrIY+96lJS9bZ:e6d9fJRc7jvedZ

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 8 IoCs
  • Stealc

    Stealc is an infostealer written in C++.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • 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
  • Checks processor information in registry 2 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8d1073c24d6e764f960f9c3dd5fc7efc010c1be0a61218bba2be3d1356a69c9c.exe
    "C:\Users\Admin\AppData\Local\Temp\8d1073c24d6e764f960f9c3dd5fc7efc010c1be0a61218bba2be3d1356a69c9c.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1744
    • C:\Users\Admin\AppData\Local\Temp\katD6C8.tmp
      C:\Users\Admin\AppData\Local\Temp\katD6C8.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:2520

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\katD6C8.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/1744-0-0x0000000002370000-0x0000000002371000-memory.dmp

    Filesize

    4KB

  • memory/1744-2-0x0000000003FF0000-0x000000000413C000-memory.dmp

    Filesize

    1.3MB

  • memory/1744-9-0x0000000000400000-0x0000000000614000-memory.dmp

    Filesize

    2.1MB

  • memory/2520-8-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2520-10-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2520-4-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2520-16-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2520-17-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2520-20-0x000000001B670000-0x000000001B8CF000-memory.dmp

    Filesize

    2.4MB

  • memory/2520-34-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2520-35-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB