Analysis

  • max time kernel
    194s
  • max time network
    302s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    30/05/2024, 23:04

General

  • Target

    6a1b36a536af1fc526a66c79a6df44cf2d1131e96b59acfbe38fe6bb01f9d5f3.exe

  • Size

    2.0MB

  • MD5

    fbceb9fb51287ac1664b24aed6fe6027

  • SHA1

    7655f33dd6456f792933af0ef6b77ada7ef692ef

  • SHA256

    6a1b36a536af1fc526a66c79a6df44cf2d1131e96b59acfbe38fe6bb01f9d5f3

  • SHA512

    2b2397873e1fa7501a2b20d62aa8736c9b6714af22b45ff62071100192f514e14cadc889056b09be3a50e2909609355877a704023e62cec16113655f1cbfab07

  • SSDEEP

    49152:OePpQEVJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEVtIuoITsdZ

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

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 4 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6a1b36a536af1fc526a66c79a6df44cf2d1131e96b59acfbe38fe6bb01f9d5f3.exe
    "C:\Users\Admin\AppData\Local\Temp\6a1b36a536af1fc526a66c79a6df44cf2d1131e96b59acfbe38fe6bb01f9d5f3.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1092
    • C:\Users\Admin\AppData\Local\Temp\kat662C.tmp
      C:\Users\Admin\AppData\Local\Temp\kat662C.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:244

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\kat662C.tmp

          Filesize

          861KB

          MD5

          66064dbdb70a5eb15ebf3bf65aba254b

          SHA1

          0284fd320f99f62aca800fb1251eff4c31ec4ed7

          SHA256

          6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

          SHA512

          b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

        • memory/244-4-0x0000000000400000-0x0000000000646000-memory.dmp

          Filesize

          2.3MB

        • memory/244-8-0x0000000000400000-0x0000000000646000-memory.dmp

          Filesize

          2.3MB

        • memory/244-9-0x0000000000400000-0x0000000000646000-memory.dmp

          Filesize

          2.3MB

        • memory/244-16-0x0000000000400000-0x0000000000646000-memory.dmp

          Filesize

          2.3MB

        • memory/244-17-0x0000000000400000-0x0000000000646000-memory.dmp

          Filesize

          2.3MB

        • memory/244-19-0x000000001B6C0000-0x000000001B91F000-memory.dmp

          Filesize

          2.4MB

        • memory/244-34-0x0000000000400000-0x0000000000646000-memory.dmp

          Filesize

          2.3MB

        • memory/244-35-0x0000000000400000-0x0000000000646000-memory.dmp

          Filesize

          2.3MB

        • memory/1092-0-0x0000000002230000-0x0000000002231000-memory.dmp

          Filesize

          4KB

        • memory/1092-1-0x0000000003EB0000-0x0000000003FF9000-memory.dmp

          Filesize

          1.3MB

        • memory/1092-10-0x0000000000400000-0x0000000000612000-memory.dmp

          Filesize

          2.1MB