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
    07-06-2024 02:33

General

  • Target

    fab9962d3eef151e53265e0cfa0e5d4daafa56bcee317f22d85e12bcb80c19a5.exe

  • Size

    2.4MB

  • MD5

    141d58eb6256aa247ce18f83cb30ff23

  • SHA1

    de76f8f1660314bef2e06be974542b11fbd62c13

  • SHA256

    fab9962d3eef151e53265e0cfa0e5d4daafa56bcee317f22d85e12bcb80c19a5

  • SHA512

    6754d58736b252e87a5251b02bbcb2ca0b282eb6de53f1a81a7d31af6439f0b8e166b66edb662b3fe2d820e06b10ce4df89fef35a2b99fe07e8a8980aa19be47

  • SSDEEP

    49152:wQc81KnB/a/hNT/dxYa8aesY3Ot4N7G/:wDta/hNT/dxn0etD/

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 6 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fab9962d3eef151e53265e0cfa0e5d4daafa56bcee317f22d85e12bcb80c19a5.exe
    "C:\Users\Admin\AppData\Local\Temp\fab9962d3eef151e53265e0cfa0e5d4daafa56bcee317f22d85e12bcb80c19a5.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4192
    • C:\Users\Admin\AppData\Local\Temp\kat62E0.tmp
      C:\Users\Admin\AppData\Local\Temp\kat62E0.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:828

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat62E0.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/828-4-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/828-9-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/828-10-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/828-25-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/828-26-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/828-28-0x0000000025F60000-0x00000000261BF000-memory.dmp

    Filesize

    2.4MB

  • memory/828-43-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/828-44-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4192-0-0x00000000007C0000-0x00000000007C1000-memory.dmp

    Filesize

    4KB

  • memory/4192-8-0x0000000000400000-0x0000000000663000-memory.dmp

    Filesize

    2.4MB

  • memory/4192-1-0x0000000003EB0000-0x0000000003FFC000-memory.dmp

    Filesize

    1.3MB