Analysis

  • max time kernel
    92s
  • max time network
    95s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10-06-2024 15:50

General

  • Target

    a1f8d06643d6a1f2d9dda4a3858d8f10515642d111065dc4c0dc7e9faaf8a314.exe

  • Size

    1.7MB

  • MD5

    af7143ddc7d4ec3af264e2fba7168cd5

  • SHA1

    57c85a23e4eb3ab163973cd45bf62f3149547a2b

  • SHA256

    a1f8d06643d6a1f2d9dda4a3858d8f10515642d111065dc4c0dc7e9faaf8a314

  • SHA512

    dbaae7604452db5f4084009d0edb64e124de40f0a20a3806f4fdcc2f56a60de26c3edba983656242eb750d9d1734c9ff54c4f9f467f60567c43e9e8348e974b5

  • SSDEEP

    24576:JoZYQkmdrf+oUfMxVVtes12FxwojKr98YGeGG9iH:JPYxFUkxVVChjHZQsH

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\a1f8d06643d6a1f2d9dda4a3858d8f10515642d111065dc4c0dc7e9faaf8a314.exe
    "C:\Users\Admin\AppData\Local\Temp\a1f8d06643d6a1f2d9dda4a3858d8f10515642d111065dc4c0dc7e9faaf8a314.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3336
    • C:\Users\Admin\AppData\Local\Temp\kat5321.tmp
      C:\Users\Admin\AppData\Local\Temp\kat5321.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:216

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat5321.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/216-9-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/216-10-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/216-4-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/216-13-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/216-14-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/216-16-0x000000001DBF0000-0x000000001DE4F000-memory.dmp

    Filesize

    2.4MB

  • memory/216-31-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/216-32-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/3336-0-0x00000000006A0000-0x00000000006A1000-memory.dmp

    Filesize

    4KB

  • memory/3336-1-0x0000000003FF0000-0x0000000004100000-memory.dmp

    Filesize

    1.1MB

  • memory/3336-6-0x0000000000400000-0x00000000005B8000-memory.dmp

    Filesize

    1.7MB