Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-05-2024 21:05

General

  • Target

    861d3b4691309a6e24138665a6c960e1fcba5229e049b10012064f3e450ce9ce.exe

  • Size

    2.0MB

  • MD5

    14231efb0c56ea43b9f2ef328540f07a

  • SHA1

    0f358db9469597b5424385b30b52c9680d971fb4

  • SHA256

    861d3b4691309a6e24138665a6c960e1fcba5229e049b10012064f3e450ce9ce

  • SHA512

    c680bc5514fabe66cf9a916a787cfe7ac28299d98b8ffa9d046ee77919ae1068b12c2c82d48fed5752c951ccc43ca5ed90726b2aed7fa8706dc5eba685c77de8

  • SSDEEP

    49152:7QzHt472DwJtTF+TxMoxc1TU+j+dAzGwlrh:7QzHtatIuoITsdZ

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

  • Detect Vidar Stealer 14 IoCs
  • Stealc

    Stealc is an infostealer written in C++.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • 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 WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\861d3b4691309a6e24138665a6c960e1fcba5229e049b10012064f3e450ce9ce.exe
    "C:\Users\Admin\AppData\Local\Temp\861d3b4691309a6e24138665a6c960e1fcba5229e049b10012064f3e450ce9ce.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3668
    • C:\Users\Admin\AppData\Local\Temp\kat47D6.tmp
      C:\Users\Admin\AppData\Local\Temp\kat47D6.tmp
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:976
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat47D6.tmp" & rd /s /q "C:\ProgramData\HJJEGCAAECBF" & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3604
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 10
          4⤵
          • Delays execution with timeout.exe
          PID:4224

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat47D6.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/976-15-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/976-61-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/976-17-0x000000001B780000-0x000000001B9DF000-memory.dmp

    Filesize

    2.4MB

  • memory/976-10-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/976-32-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/976-4-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/976-14-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/976-33-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/976-8-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/976-66-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/976-63-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/976-49-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/976-50-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/976-62-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/3668-1-0x00000000041E0000-0x0000000004329000-memory.dmp

    Filesize

    1.3MB

  • memory/3668-0-0x0000000000710000-0x0000000000711000-memory.dmp

    Filesize

    4KB

  • memory/3668-9-0x0000000000400000-0x0000000000601000-memory.dmp

    Filesize

    2.0MB