Analysis

  • max time kernel
    94s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-06-2024 07:39

General

  • Target

    6e5b34cf55d69f86e0b6404db41a0542a1c2eb27e3effb07781b056af6e7fe83.exe

  • Size

    2.4MB

  • MD5

    d4443519e2e81af0f0e936f42e91b0a2

  • SHA1

    f44089a0a4ef3527374950ec69a859411d8053a4

  • SHA256

    6e5b34cf55d69f86e0b6404db41a0542a1c2eb27e3effb07781b056af6e7fe83

  • SHA512

    6c2c3319dbaf7938d6616674e60438bb4670ff5d6888244b9f3a288d6ce5475954c0054f6f7d1b50b1bb855b0e8b16d6aab65e78c95753674b31202c14cea1d8

  • SSDEEP

    49152:wQc81KnB/a/hNT/dJYa8aesY3Ot4N7G/:wDta/hNT/dJn0etD/

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\6e5b34cf55d69f86e0b6404db41a0542a1c2eb27e3effb07781b056af6e7fe83.exe
    "C:\Users\Admin\AppData\Local\Temp\6e5b34cf55d69f86e0b6404db41a0542a1c2eb27e3effb07781b056af6e7fe83.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:928
    • C:\Users\Admin\AppData\Local\Temp\kat4AE4.tmp
      C:\Users\Admin\AppData\Local\Temp\kat4AE4.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4656

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat4AE4.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/928-0-0x00000000023D0000-0x00000000023D1000-memory.dmp

    Filesize

    4KB

  • memory/928-2-0x0000000004050000-0x000000000419C000-memory.dmp

    Filesize

    1.3MB

  • memory/928-9-0x0000000000400000-0x0000000000663000-memory.dmp

    Filesize

    2.4MB

  • memory/4656-4-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4656-8-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4656-10-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4656-22-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4656-23-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4656-25-0x000000001B770000-0x000000001B9CF000-memory.dmp

    Filesize

    2.4MB

  • memory/4656-40-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4656-41-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB