Analysis

  • max time kernel
    121s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    27-10-2024 16:20

General

  • Target

    A9ZFW_file.exe

  • Size

    1.8MB

  • MD5

    5a13a0fa7c0983274d34fb5499aa2a8b

  • SHA1

    cdf4e14e103ef119c0122cadb01abca1460827a9

  • SHA256

    5ccc7cf886a54dfc66eac92fc4cb4acc8cfc5069ca3912abb4f8801831bf1fdc

  • SHA512

    5cbc92b720ba806196b312f4ef319cc70c728bb5be90e84d8eb3773d2a144feb0da476d7b8ab7f9d68168bb725bddb1a57857c4b15dbac8b59702d06dc4be6e5

  • SSDEEP

    49152:snaDFK4Arc4lvxP0xdysBnb/Quo0PTY0G:s8FK4d4mcsdoQw

Malware Config

Extracted

Family

stealc

Botnet

puma

C2

http://185.215.113.206

Attributes
  • url_path

    /e2b1563c6670f193.php

Signatures

  • Stealc

    Stealc is an infostealer written in C++.

  • Stealc family
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Deletes itself 1 IoCs
  • Identifies Wine through registry keys 2 TTPs 1 IoCs

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Unsecured Credentials: Credentials In Files 1 TTPs

    Steal credentials from unsecured files.

  • 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 NtSetInformationThreadHideFromDebugger 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\A9ZFW_file.exe
    "C:\Users\Admin\AppData\Local\Temp\A9ZFW_file.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Identifies Wine through registry keys
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • System Location Discovery: System Language Discovery
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2900
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\A9ZFW_file.exe" & del "C:\ProgramData\*.dll"" & exit
      2⤵
      • Deletes itself
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1016
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 5
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:2428

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • memory/2900-0-0x0000000000CA0000-0x000000000133F000-memory.dmp

    Filesize

    6.6MB

  • memory/2900-1-0x0000000077D20000-0x0000000077D22000-memory.dmp

    Filesize

    8KB

  • memory/2900-2-0x0000000000CA1000-0x0000000000CC4000-memory.dmp

    Filesize

    140KB

  • memory/2900-3-0x0000000000CA0000-0x000000000133F000-memory.dmp

    Filesize

    6.6MB

  • memory/2900-4-0x0000000000CA0000-0x000000000133F000-memory.dmp

    Filesize

    6.6MB

  • memory/2900-7-0x0000000000CA0000-0x000000000133F000-memory.dmp

    Filesize

    6.6MB

  • memory/2900-5-0x0000000000CA0000-0x000000000133F000-memory.dmp

    Filesize

    6.6MB

  • memory/2900-6-0x0000000000CA0000-0x000000000133F000-memory.dmp

    Filesize

    6.6MB