Analysis

  • max time kernel
    133s
  • max time network
    298s
  • 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

    650e8331695b791f9cf017604bc33030f50783d124b7091644c031e5866296ad.exe

  • Size

    2.0MB

  • MD5

    492e7287781bf66dc572ec9e224142fd

  • SHA1

    dbaf386f655530b765d8d34d032ab1968a345602

  • SHA256

    650e8331695b791f9cf017604bc33030f50783d124b7091644c031e5866296ad

  • SHA512

    128f012c2fce283f5bd91c0074a3770f405a758c31a97584bc9caa52ab8b3b15a1c4f65657c3917487a05986285ccf723db991bce5a3944114d5f62c2cc850a0

  • SSDEEP

    49152:eqtdPVosJEkz/+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 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 4 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\650e8331695b791f9cf017604bc33030f50783d124b7091644c031e5866296ad.exe
    "C:\Users\Admin\AppData\Local\Temp\650e8331695b791f9cf017604bc33030f50783d124b7091644c031e5866296ad.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4704
    • C:\Users\Admin\AppData\Local\Temp\kat661C.tmp
      C:\Users\Admin\AppData\Local\Temp\kat661C.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:2880

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat661C.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/2880-4-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2880-8-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2880-10-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2880-25-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2880-26-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2880-28-0x0000000028380000-0x00000000285DF000-memory.dmp

    Filesize

    2.4MB

  • memory/2880-43-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2880-44-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4704-0-0x00000000007D0000-0x00000000007D1000-memory.dmp

    Filesize

    4KB

  • memory/4704-1-0x0000000004060000-0x00000000041AC000-memory.dmp

    Filesize

    1.3MB

  • memory/4704-9-0x0000000000400000-0x0000000000614000-memory.dmp

    Filesize

    2.1MB