Analysis

  • max time kernel
    125s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/06/2024, 09:14

General

  • Target

    dd0656cfec8f2a1424ed60350dddfb43bfd5dc1e0bb6f70a7b78aa8319d0f730.exe

  • Size

    2.1MB

  • MD5

    c4bec5d4577ba541bbca18dd42d28301

  • SHA1

    36df2db5159af4d9575ec1f237626838f505b24f

  • SHA256

    dd0656cfec8f2a1424ed60350dddfb43bfd5dc1e0bb6f70a7b78aa8319d0f730

  • SHA512

    1a7bf2042d3e07b17de67b057313287fa5244ef659b4e7cfe9424490c4aa6038e1fe07e938355fb659d85abc43fcc3a64b27c3ab187c668ae3ce3d92337a77fb

  • SSDEEP

    24576:Ub4m+sws1qLVNMIlJl6DRKbAlcNRfCKFUfMxVVtes12FxwojKr98YGeGG9iO:UZXOjt6DuAwCKFUkxVVChjHZQs

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\dd0656cfec8f2a1424ed60350dddfb43bfd5dc1e0bb6f70a7b78aa8319d0f730.exe
    "C:\Users\Admin\AppData\Local\Temp\dd0656cfec8f2a1424ed60350dddfb43bfd5dc1e0bb6f70a7b78aa8319d0f730.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2440
    • C:\Users\Admin\AppData\Local\Temp\katD570.tmp
      C:\Users\Admin\AppData\Local\Temp\katD570.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:1812
  • 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 --field-trial-handle=4440,i,8998666007764333392,14724298544432336038,262144 --variations-seed-version --mojo-platform-channel-handle=4132 /prefetch:8
    1⤵
      PID:4412

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\katD570.tmp

      Filesize

      861KB

      MD5

      66064dbdb70a5eb15ebf3bf65aba254b

      SHA1

      0284fd320f99f62aca800fb1251eff4c31ec4ed7

      SHA256

      6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

      SHA512

      b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

    • memory/1812-4-0x0000000000400000-0x0000000000648000-memory.dmp

      Filesize

      2.3MB

    • memory/1812-8-0x0000000000400000-0x0000000000648000-memory.dmp

      Filesize

      2.3MB

    • memory/1812-9-0x0000000000400000-0x0000000000648000-memory.dmp

      Filesize

      2.3MB

    • memory/1812-20-0x0000000000400000-0x0000000000648000-memory.dmp

      Filesize

      2.3MB

    • memory/1812-21-0x0000000000400000-0x0000000000648000-memory.dmp

      Filesize

      2.3MB

    • memory/1812-23-0x000000001B7D0000-0x000000001BA2F000-memory.dmp

      Filesize

      2.4MB

    • memory/1812-31-0x0000000000400000-0x0000000000648000-memory.dmp

      Filesize

      2.3MB

    • memory/1812-32-0x0000000000400000-0x0000000000648000-memory.dmp

      Filesize

      2.3MB

    • memory/2440-0-0x0000000002280000-0x0000000002281000-memory.dmp

      Filesize

      4KB

    • memory/2440-2-0x0000000002A70000-0x0000000002B80000-memory.dmp

      Filesize

      1.1MB

    • memory/2440-10-0x0000000000400000-0x0000000000629000-memory.dmp

      Filesize

      2.2MB