Analysis

  • max time kernel
    188s
  • 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 05:33

General

  • Target

    617c19163c3fd298599f87f9a01ab89ba84c01f82f4405825df85161dad56b0f.exe

  • Size

    2.0MB

  • MD5

    7afca7d76709ef8b64f8209107476602

  • SHA1

    c01f3bdb42ca28dd2a303c2c1d7550bec75fd4dd

  • SHA256

    617c19163c3fd298599f87f9a01ab89ba84c01f82f4405825df85161dad56b0f

  • SHA512

    27b1d6f090713d47fb0768897914dcc62e43e298fc410778e69f25ba10104fb3245e13dddc7f9ec9b6a7ba01b228b10535f76f100738d71f4149e6af82256320

  • SSDEEP

    49152:eqtdPVosJEEz/+VHA58ljrIY+96lJS9bZ:e6d9fJVc7jvedZ

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 6 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 8 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\617c19163c3fd298599f87f9a01ab89ba84c01f82f4405825df85161dad56b0f.exe
    "C:\Users\Admin\AppData\Local\Temp\617c19163c3fd298599f87f9a01ab89ba84c01f82f4405825df85161dad56b0f.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3564
    • C:\Users\Admin\AppData\Local\Temp\katDDBD.tmp
      C:\Users\Admin\AppData\Local\Temp\katDDBD.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4824

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/3564-0-0x00007FF80A4D0000-0x00007FF80A6AB000-memory.dmp

    Filesize

    1.9MB

  • memory/3564-8-0x0000000000400000-0x0000000000614000-memory.dmp

    Filesize

    2.1MB

  • memory/4824-9-0x00007FF80A4D0000-0x00007FF80A6AB000-memory.dmp

    Filesize

    1.9MB

  • memory/4824-7-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4824-3-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4824-15-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4824-16-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4824-18-0x00000000192C0000-0x000000001951F000-memory.dmp

    Filesize

    2.4MB

  • memory/4824-33-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4824-34-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB