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Analysis

  • max time kernel
    90s
  • max time network
    123s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    08/06/2024, 17:59

General

  • Target

    65ed96ae24698ed824cdc50cd54d85ffe36148e5a70e7093243fb446b7d71c41.exe

  • Size

    1.9MB

  • MD5

    6090b8a6aa613fa717b03676f6d2c1dd

  • SHA1

    60c24ad8f163be51c1ba0224670004cc11594e18

  • SHA256

    65ed96ae24698ed824cdc50cd54d85ffe36148e5a70e7093243fb446b7d71c41

  • SHA512

    9516647b87c4eea8a47dcebed184cd79f73d6a814175cf29bb759ff9bd1acda28811e0901bc4ea21b9834abed499613c2ffa50c9c6b49e4503f6d89cc498d9ab

  • SSDEEP

    49152:zsC/lYEBY3sEAQACR07Q3byRD8aXY658:zsCdYEBOfAw07QLyLn

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\65ed96ae24698ed824cdc50cd54d85ffe36148e5a70e7093243fb446b7d71c41.exe
    "C:\Users\Admin\AppData\Local\Temp\65ed96ae24698ed824cdc50cd54d85ffe36148e5a70e7093243fb446b7d71c41.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1284
    • C:\Users\Admin\AppData\Local\Temp\kat7B6A.tmp
      C:\Users\Admin\AppData\Local\Temp\kat7B6A.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4540

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat7B6A.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/1284-0-0x00000000008A0000-0x00000000008A1000-memory.dmp

    Filesize

    4KB

  • memory/1284-2-0x00000000040E0000-0x0000000004243000-memory.dmp

    Filesize

    1.4MB

  • memory/1284-10-0x0000000000400000-0x00000000005EE000-memory.dmp

    Filesize

    1.9MB

  • memory/4540-4-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4540-9-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4540-8-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4540-24-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4540-25-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4540-27-0x000000001DC80000-0x000000001DEDF000-memory.dmp

    Filesize

    2.4MB

  • memory/4540-42-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4540-43-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB