Analysis

  • max time kernel
    133s
  • max time network
    244s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    07-06-2024 01:36

General

  • Target

    c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe

  • Size

    3.6MB

  • MD5

    131e367009cf014321e7a70e70c4067c

  • SHA1

    4c02332af53519fdae235f804f5144ba9c7e725d

  • SHA256

    c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89

  • SHA512

    3702fefbcf4eab279484359f61d997b7c32d9c77dd9e255a44e96de9373d18b68ff262037494203f181c359aca549020dcfea3db01d11f8f51e224261259f99e

  • SSDEEP

    49152:fWN3Bsjz4Ddee7wE4o40nQaoJab9Xejv2aH0n2EBvnE8/8OhkqdHG22T9d:f6ujz4DdeClnE8f4T

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 2 IoCs
  • Stealc

    Stealc is an infostealer written in C++.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • 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
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Checks processor information in registry 2 TTPs 1 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe
    "C:\Users\Admin\AppData\Local\Temp\c4c7045103f42bea7bc9afb11433e4f49d767be0d0b28b678a824e5627804b89.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4684
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      2⤵
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2880
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" & rd /s /q "C:\ProgramData\JDAKJJDBGCAK" & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4916
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 10
          4⤵
          • Delays execution with timeout.exe
          PID:4240

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/2880-67-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/2880-69-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4684-50-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-16-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-4-0x0000000005720000-0x000000000580E000-memory.dmp

    Filesize

    952KB

  • memory/4684-5-0x0000000005810000-0x00000000058DC000-memory.dmp

    Filesize

    816KB

  • memory/4684-6-0x0000000005540000-0x000000000555C000-memory.dmp

    Filesize

    112KB

  • memory/4684-8-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-18-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-66-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-64-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-2-0x0000000005630000-0x00000000056CC000-memory.dmp

    Filesize

    624KB

  • memory/4684-1-0x0000000000A00000-0x0000000000D96000-memory.dmp

    Filesize

    3.6MB

  • memory/4684-73-0x0000000073CA0000-0x000000007438E000-memory.dmp

    Filesize

    6.9MB

  • memory/4684-62-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-46-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-58-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-56-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-54-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-52-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-41-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-3-0x0000000073CA0000-0x000000007438E000-memory.dmp

    Filesize

    6.9MB

  • memory/4684-60-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-44-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-42-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-38-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-36-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-34-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-32-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-30-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-28-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-26-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-24-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-22-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-20-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-48-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-14-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-12-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-10-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB

  • memory/4684-0-0x0000000073CAE000-0x0000000073CAF000-memory.dmp

    Filesize

    4KB

  • memory/4684-7-0x0000000005540000-0x0000000005555000-memory.dmp

    Filesize

    84KB