Analysis

  • max time kernel
    195s
  • max time network
    255s
  • 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 05:40

General

  • Target

    87de249f91629dfcdead09370c3821f93e93caf49e04705c8d7d1a0736af49b4.exe

  • Size

    2.4MB

  • MD5

    e35b75079c03f8536e2da425b17d3c1f

  • SHA1

    9738a9e337d44bdf57a926f663c45b1b73819387

  • SHA256

    87de249f91629dfcdead09370c3821f93e93caf49e04705c8d7d1a0736af49b4

  • SHA512

    381a628a429a24041383b83be5066a59b5870804e0c168e3379204ec07861fe253826dbbf2706d5723d22ef6dd8e7eb9d0e57ce33732fc1395f7568893353b81

  • SSDEEP

    49152:wQc81KnB/a/hNT/dFYa8aesY3Ot4N7G/:wDta/hNT/dFn0etD/

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 9 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 data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • 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 10 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\87de249f91629dfcdead09370c3821f93e93caf49e04705c8d7d1a0736af49b4.exe
    "C:\Users\Admin\AppData\Local\Temp\87de249f91629dfcdead09370c3821f93e93caf49e04705c8d7d1a0736af49b4.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4760
    • C:\Users\Admin\AppData\Local\Temp\kat612B.tmp
      C:\Users\Admin\AppData\Local\Temp\kat612B.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:520

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat612B.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/520-9-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/520-4-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/520-8-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/520-16-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/520-17-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/520-19-0x00000000191E0000-0x000000001943F000-memory.dmp

    Filesize

    2.4MB

  • memory/520-34-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/520-42-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/520-47-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4760-0-0x0000000000760000-0x0000000000761000-memory.dmp

    Filesize

    4KB

  • memory/4760-10-0x0000000000400000-0x0000000000663000-memory.dmp

    Filesize

    2.4MB

  • memory/4760-2-0x0000000003F60000-0x00000000040AC000-memory.dmp

    Filesize

    1.3MB