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Analysis

  • max time kernel
    92s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/06/2024, 01:08

General

  • Target

    07a00c230e9e8e0a6898952e757407cef0134e67910848fa4db4bdc30d5c9a31.exe

  • Size

    2.4MB

  • MD5

    e2f8d4aac13ce25e82c537628370bc7b

  • SHA1

    55716e80307385c2ea4e2f01f2308d8639626ebd

  • SHA256

    07a00c230e9e8e0a6898952e757407cef0134e67910848fa4db4bdc30d5c9a31

  • SHA512

    1ae7139cb940cc5de4ba581ce7f172a5f0bed9ac7cf323e4949f18e2cc7860c51a04bface6169ce8041d405f28b4879f7c43681e4d76bf7967e22bb41f33e68a

  • SSDEEP

    49152:wQc81KnB/a/hNT/d1Ya8aesY3Ot4N7G/:wDta/hNT/d1n0etD/

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 9 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\07a00c230e9e8e0a6898952e757407cef0134e67910848fa4db4bdc30d5c9a31.exe
    "C:\Users\Admin\AppData\Local\Temp\07a00c230e9e8e0a6898952e757407cef0134e67910848fa4db4bdc30d5c9a31.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3448
    • C:\Users\Admin\AppData\Local\Temp\kat4B32.tmp
      C:\Users\Admin\AppData\Local\Temp\kat4B32.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4284

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat4B32.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/3448-9-0x0000000000400000-0x0000000000663000-memory.dmp

    Filesize

    2.4MB

  • memory/3448-1-0x0000000002B70000-0x0000000002CBC000-memory.dmp

    Filesize

    1.3MB

  • memory/3448-0-0x0000000002510000-0x0000000002511000-memory.dmp

    Filesize

    4KB

  • memory/4284-4-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4284-8-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4284-10-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4284-22-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4284-25-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4284-26-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4284-28-0x000000001B7A0000-0x000000001B9FF000-memory.dmp

    Filesize

    2.4MB

  • memory/4284-43-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4284-44-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB