Analysis

  • max time kernel
    146s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240419-en
  • resource tags

    arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    24-05-2024 23:58

General

  • Target

    6788f9d24708c77f9911e34ea6e8e226c1220b5ea11a112a3fe8c1a58ffa6a70.exe

  • Size

    2.0MB

  • MD5

    fa51099ac0a93fa5466bfc001997868f

  • SHA1

    eb74dad1d41b4fce18dad69602aca2ad14bb162b

  • SHA256

    6788f9d24708c77f9911e34ea6e8e226c1220b5ea11a112a3fe8c1a58ffa6a70

  • SHA512

    0dea335410d79f98b7829fdff6561faddf2f35f1b1971682e57a8e5cd9662c820c1971fdd86066b5e6116b70c2c928406df6c094bf793406419f5b486e71bbb2

  • SSDEEP

    49152:s4K3x1vUWJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18WtIuoITsdZ

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 14 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 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\6788f9d24708c77f9911e34ea6e8e226c1220b5ea11a112a3fe8c1a58ffa6a70.exe
    "C:\Users\Admin\AppData\Local\Temp\6788f9d24708c77f9911e34ea6e8e226c1220b5ea11a112a3fe8c1a58ffa6a70.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2920
    • C:\Users\Admin\AppData\Local\Temp\kat5321.tmp
      C:\Users\Admin\AppData\Local\Temp\kat5321.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4064
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat5321.tmp" & rd /s /q "C:\ProgramData\JEBGIIDBKEBF" & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2216
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 10
          4⤵
          • Delays execution with timeout.exe
          PID:4268

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat5321.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/2920-10-0x0000000000400000-0x000000000060C000-memory.dmp

    Filesize

    2.0MB

  • memory/2920-2-0x00000000041B0000-0x00000000042F9000-memory.dmp

    Filesize

    1.3MB

  • memory/2920-0-0x0000000002580000-0x0000000002581000-memory.dmp

    Filesize

    4KB

  • memory/4064-20-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4064-38-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4064-8-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4064-19-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4064-4-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4064-22-0x0000000026010000-0x000000002626F000-memory.dmp

    Filesize

    2.4MB

  • memory/4064-37-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4064-9-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4064-54-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4064-55-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4064-66-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4064-67-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4064-68-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4064-69-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB