Analysis

  • max time kernel
    91s
  • max time network
    99s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    03/06/2024, 23:11

General

  • Target

    f1f037b2393291f7fce079a0875756e613aa2527cff0649c5f302f81b63b6755.exe

  • Size

    1.8MB

  • MD5

    f0ccfd158ab6afc054539e1ab24c9f56

  • SHA1

    020a7e8bd75b484637fc7cc64d208893dda567ec

  • SHA256

    f1f037b2393291f7fce079a0875756e613aa2527cff0649c5f302f81b63b6755

  • SHA512

    a11c15a84809d34be113377a0ccc86003f3cf0a7b041e36d49c8d6423cba6f21415e889f9332fa5a982c20b7eeea57898bf2b6bf6feaeca4b49b89a77b54f4b7

  • SSDEEP

    24576:W7YfUB7F1931tb5YaOV+rEfv0xwT3zxNOt4XigDSCuptNEynEsqqfD:W75B7FDFtb5Ya8aesY3Ot4N7G/

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 13 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 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\f1f037b2393291f7fce079a0875756e613aa2527cff0649c5f302f81b63b6755.exe
    "C:\Users\Admin\AppData\Local\Temp\f1f037b2393291f7fce079a0875756e613aa2527cff0649c5f302f81b63b6755.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2240
    • C:\Users\Admin\AppData\Local\Temp\kat9C7E.tmp
      C:\Users\Admin\AppData\Local\Temp\kat9C7E.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1236
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat9C7E.tmp" & rd /s /q "C:\ProgramData\AFCFHDHIIIEC" & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1544
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 10
          4⤵
          • Delays execution with timeout.exe
          PID:1336

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat9C7E.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/1236-50-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/1236-33-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/1236-9-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/1236-66-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/1236-8-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/1236-4-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/1236-63-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/1236-15-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/1236-18-0x00000000193C0000-0x000000001961F000-memory.dmp

    Filesize

    2.4MB

  • memory/1236-16-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/1236-34-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/1236-62-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/1236-51-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2240-0-0x0000000002420000-0x0000000002421000-memory.dmp

    Filesize

    4KB

  • memory/2240-1-0x0000000002B40000-0x0000000002C8C000-memory.dmp

    Filesize

    1.3MB

  • memory/2240-10-0x0000000000400000-0x00000000005CE000-memory.dmp

    Filesize

    1.8MB