Analysis

  • max time kernel
    199s
  • max time network
    299s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    03-06-2024 05:37

General

  • Target

    733e23e0d7748ad35b7fc2b785041c74d1d48ea7ca5d9d7257a185be7beb652c.exe

  • Size

    2.0MB

  • MD5

    2429592089480d6026f34386a38e6a37

  • SHA1

    6e1a875b69da9ea36702eaad5ab3bb9ae14a4bf0

  • SHA256

    733e23e0d7748ad35b7fc2b785041c74d1d48ea7ca5d9d7257a185be7beb652c

  • SHA512

    65eadeb891ddd5587af70cd483e2e201dcbeea94a86399af0e7e907a638817eab6819d8618b222242b1655a4e2d27662b0a7d549e02c03d1ddcb86435b506cec

  • SSDEEP

    49152:eqtdPVosJEQz/+VHA58ljrIY+96lJS9bZ:e6d9fJBc7jvedZ

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 10 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\733e23e0d7748ad35b7fc2b785041c74d1d48ea7ca5d9d7257a185be7beb652c.exe
    "C:\Users\Admin\AppData\Local\Temp\733e23e0d7748ad35b7fc2b785041c74d1d48ea7ca5d9d7257a185be7beb652c.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1448
    • C:\Users\Admin\AppData\Local\Temp\kat6409.tmp
      C:\Users\Admin\AppData\Local\Temp\kat6409.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4496

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat6409.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/1448-0-0x0000000002370000-0x0000000002371000-memory.dmp

    Filesize

    4KB

  • memory/1448-1-0x0000000004100000-0x000000000424C000-memory.dmp

    Filesize

    1.3MB

  • memory/1448-9-0x0000000000400000-0x0000000000614000-memory.dmp

    Filesize

    2.1MB

  • memory/4496-4-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4496-8-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4496-10-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4496-16-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4496-17-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4496-19-0x000000001B700000-0x000000001B95F000-memory.dmp

    Filesize

    2.4MB

  • memory/4496-34-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4496-35-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB