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Analysis

  • max time kernel
    133s
  • 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
    03/06/2024, 05:27

General

  • Target

    d7f71655dfc3e37930f5cd3f1b11e671b82fe6710575954597772ee67f972048.exe

  • Size

    2.4MB

  • MD5

    e3ed1d1fc684a58bcb6b319b2660796b

  • SHA1

    efe295ada71c63daebeb83b64faa0e10df6e541b

  • SHA256

    d7f71655dfc3e37930f5cd3f1b11e671b82fe6710575954597772ee67f972048

  • SHA512

    c0de3f17fd64962e200cc61b4bf14ab6c19dd8fc5fd1d5a759d2e7d4bee0e3d20412de5f4bb768977dc37ae8161186a56dd38c732bbff6a7144098c9052fbbf8

  • SSDEEP

    49152:wQc81KnB/a/hNT/ddYa8aesY3Ot4N7G/:wDta/hNT/ddn0etD/

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/ta904ek

https://steamcommunity.com/profiles/76561199695752269

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\d7f71655dfc3e37930f5cd3f1b11e671b82fe6710575954597772ee67f972048.exe
    "C:\Users\Admin\AppData\Local\Temp\d7f71655dfc3e37930f5cd3f1b11e671b82fe6710575954597772ee67f972048.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:720
    • C:\Users\Admin\AppData\Local\Temp\katF194.tmp
      C:\Users\Admin\AppData\Local\Temp\katF194.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4520
  • 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=4104,i,10373433614523925616,13586256558317053467,262144 --variations-seed-version --mojo-platform-channel-handle=3976 /prefetch:8
    1⤵
      PID:4412

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\katF194.tmp

      Filesize

      861KB

      MD5

      66064dbdb70a5eb15ebf3bf65aba254b

      SHA1

      0284fd320f99f62aca800fb1251eff4c31ec4ed7

      SHA256

      6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

      SHA512

      b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

    • memory/720-0-0x00000000023E0000-0x00000000023E1000-memory.dmp

      Filesize

      4KB

    • memory/720-2-0x00000000029D0000-0x0000000002B1C000-memory.dmp

      Filesize

      1.3MB

    • memory/720-10-0x0000000000400000-0x0000000000663000-memory.dmp

      Filesize

      2.4MB

    • memory/4520-4-0x0000000000400000-0x0000000000649000-memory.dmp

      Filesize

      2.3MB

    • memory/4520-8-0x0000000000400000-0x0000000000649000-memory.dmp

      Filesize

      2.3MB

    • memory/4520-9-0x0000000000400000-0x0000000000649000-memory.dmp

      Filesize

      2.3MB

    • memory/4520-13-0x0000000000400000-0x0000000000649000-memory.dmp

      Filesize

      2.3MB

    • memory/4520-14-0x0000000000400000-0x0000000000649000-memory.dmp

      Filesize

      2.3MB

    • memory/4520-16-0x000000001B7C0000-0x000000001BA1F000-memory.dmp

      Filesize

      2.4MB

    • memory/4520-31-0x0000000000400000-0x0000000000649000-memory.dmp

      Filesize

      2.3MB

    • memory/4520-32-0x0000000000400000-0x0000000000649000-memory.dmp

      Filesize

      2.3MB