Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240611-en
  • resource tags

    arch:x64arch:x86image:win11-20240611-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    29-06-2024 04:57

General

  • Target

    621ea1a4e883fb9a31ea2d42dd9a199dcad0867495850ea10a4f363c688058e1.exe

  • Size

    2.2MB

  • MD5

    3e1c716600ea33321c90d80f57454873

  • SHA1

    5d9385de2a26b840a81c53cf7455b7f76cf921e0

  • SHA256

    621ea1a4e883fb9a31ea2d42dd9a199dcad0867495850ea10a4f363c688058e1

  • SHA512

    360b41a72bf1f240635d59da6e2d600bf3a887946cd28cdc6cd0084785665ab35cd7bb4c6c5ac37136b03fb4e312278c3b38519592a70f2b4ba20da911adb176

  • SSDEEP

    49152:qpjNvr9ySAOmw4lHHO+SASagXkJr4MDkUwm:qpjNp7p4lHH8n5A

Malware Config

Extracted

Family

vidar

C2

https://t.me/g067n

https://steamcommunity.com/profiles/76561199707802586

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0

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 2 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\621ea1a4e883fb9a31ea2d42dd9a199dcad0867495850ea10a4f363c688058e1.exe
    "C:\Users\Admin\AppData\Local\Temp\621ea1a4e883fb9a31ea2d42dd9a199dcad0867495850ea10a4f363c688058e1.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2628
    • C:\Users\Admin\AppData\Local\Temp\kat79B4.tmp
      C:\Users\Admin\AppData\Local\Temp\kat79B4.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4080

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat79B4.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/2628-0-0x00000000024A0000-0x00000000024A1000-memory.dmp

    Filesize

    4KB

  • memory/2628-2-0x0000000002A60000-0x0000000002B70000-memory.dmp

    Filesize

    1.1MB

  • memory/2628-10-0x0000000000400000-0x0000000000635000-memory.dmp

    Filesize

    2.2MB

  • memory/4080-4-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4080-8-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4080-9-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4080-24-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4080-25-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4080-27-0x000000002D180000-0x000000002D3DF000-memory.dmp

    Filesize

    2.4MB

  • memory/4080-35-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4080-36-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB