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Analysis

  • max time kernel
    146s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240426-en
  • resource tags

    arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    06/06/2024, 12:07

General

  • Target

    727a881f1ddb5b179e1b6177275a7d3479bbe75092e5305c2fd967100a816389.exe

  • Size

    1.9MB

  • MD5

    71ab51dd9e666f8cc7040b9dabaf6497

  • SHA1

    dda6f9ad37192842c013e8e2d39d56fe789fca65

  • SHA256

    727a881f1ddb5b179e1b6177275a7d3479bbe75092e5305c2fd967100a816389

  • SHA512

    a201a579983cc6fe19c6cbaa8dc1806e6792963be97519c8ae8753003a7238a698017865d0f68d1378dda9544b0cf7f49ae6589e6635964c1151457d5039405e

  • SSDEEP

    24576:n/eC7bzaXi7m04Ju0LXolGLbJnR/z4+EbVbw2qug4ctOlQLernWO:nGYz0P04MS4cdR/z4+UVi4e9Crn

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/r8z0l

https://steamcommunity.com/profiles/76561199698764354

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\727a881f1ddb5b179e1b6177275a7d3479bbe75092e5305c2fd967100a816389.exe
    "C:\Users\Admin\AppData\Local\Temp\727a881f1ddb5b179e1b6177275a7d3479bbe75092e5305c2fd967100a816389.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4152
    • C:\Users\Admin\AppData\Local\Temp\kat58ED.tmp
      C:\Users\Admin\AppData\Local\Temp\kat58ED.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4460

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat58ED.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/4152-0-0x0000000002680000-0x0000000002681000-memory.dmp

    Filesize

    4KB

  • memory/4152-1-0x0000000004150000-0x00000000042B6000-memory.dmp

    Filesize

    1.4MB

  • memory/4152-9-0x0000000000400000-0x00000000005DF000-memory.dmp

    Filesize

    1.9MB

  • memory/4460-4-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4460-10-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4460-8-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4460-24-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4460-25-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4460-28-0x00000000260E0000-0x000000002633F000-memory.dmp

    Filesize

    2.4MB

  • memory/4460-42-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4460-43-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB