Analysis

  • max time kernel
    134s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07-06-2024 03:35

General

  • Target

    67fbf8993a834461d0dccdad8dc8190e6851d280286e322fedc13cef37f6c5fa.exe

  • Size

    2.9MB

  • MD5

    3765f2522f3544aa1fadef36a62c0c09

  • SHA1

    c550eac426af9007e0ccec9c879021cc408e17d7

  • SHA256

    67fbf8993a834461d0dccdad8dc8190e6851d280286e322fedc13cef37f6c5fa

  • SHA512

    7ed7ede8897f65339732b705f950134ac4e2a3d2ee1aab3e29d50ed5c2894b473b9a798fb2218704a9f852f93c89fd34c19e48f074f381d839e4dd426076ba11

  • SSDEEP

    49152:rtpSxptE1AKnCtMS4cdR/z4+UVi4e9Crn:r/4nE1dCiKxx4e9Cb

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\67fbf8993a834461d0dccdad8dc8190e6851d280286e322fedc13cef37f6c5fa.exe
    "C:\Users\Admin\AppData\Local\Temp\67fbf8993a834461d0dccdad8dc8190e6851d280286e322fedc13cef37f6c5fa.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3968
    • C:\Users\Admin\AppData\Local\Temp\katE9D3.tmp
      C:\Users\Admin\AppData\Local\Temp\katE9D3.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:2988
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=1316,i,17096020621006928097,15544233752327415349,262144 --variations-seed-version --mojo-platform-channel-handle=4312 /prefetch:8
    1⤵
      PID:768

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\katE9D3.tmp

      Filesize

      861KB

      MD5

      66064dbdb70a5eb15ebf3bf65aba254b

      SHA1

      0284fd320f99f62aca800fb1251eff4c31ec4ed7

      SHA256

      6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

      SHA512

      b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

    • memory/2988-9-0x0000000000400000-0x0000000000648000-memory.dmp

      Filesize

      2.3MB

    • memory/2988-8-0x0000000000400000-0x0000000000648000-memory.dmp

      Filesize

      2.3MB

    • memory/2988-4-0x0000000000400000-0x0000000000648000-memory.dmp

      Filesize

      2.3MB

    • memory/2988-13-0x0000000000400000-0x0000000000648000-memory.dmp

      Filesize

      2.3MB

    • memory/2988-14-0x0000000000400000-0x0000000000648000-memory.dmp

      Filesize

      2.3MB

    • memory/2988-16-0x000000001B740000-0x000000001B99F000-memory.dmp

      Filesize

      2.4MB

    • memory/2988-31-0x0000000000400000-0x0000000000648000-memory.dmp

      Filesize

      2.3MB

    • memory/2988-32-0x0000000000400000-0x0000000000648000-memory.dmp

      Filesize

      2.3MB

    • memory/3968-0-0x00000000024A0000-0x00000000024A1000-memory.dmp

      Filesize

      4KB

    • memory/3968-10-0x0000000000400000-0x00000000006EF000-memory.dmp

      Filesize

      2.9MB

    • memory/3968-3-0x0000000002BD0000-0x0000000002D36000-memory.dmp

      Filesize

      1.4MB