Analysis

  • max time kernel
    119s
  • max time network
    123s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    01/11/2021, 03:47

General

  • Target
    dffc949523ddd2ac73b8a498979c836a.exe
  • Size 345KB
  • Sample211101-eb7z6aghf3
  • SHA256 da0fd8df1c9f16dfcff0e35a20d287d9985cd3c81ac08f370b5121376862154e
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • azorult

C2
  • http://45.133.1.13/xsaz/index.php

Signatures

  • Azorult

    An information stealer that was first discovered in 2016, targeting browsing history and passwords.

  • Loads dropped DLL 4 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads local data of messenger clients 2 TTPs

    Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

  • 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 Microsoft Outlook profiles 1 TTPs 3 IoCs
  • 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.

  • Enumerates physical storage devices 1 TTPs

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

  • 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 6 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\dffc949523ddd2ac73b8a498979c836a.exe
    "C:\Users\Admin\AppData\Local\Temp\dffc949523ddd2ac73b8a498979c836a.exe"
    1⤵
    • Loads dropped DLL
    • Accesses Microsoft Outlook profiles
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    • outlook_office_path
    • outlook_win_path
    PID:584
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c C:\Windows\system32\timeout.exe 3 & del "dffc949523ddd2ac73b8a498979c836a.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3892
      • C:\Windows\SysWOW64\timeout.exe
        C:\Windows\system32\timeout.exe 3
        3⤵
        • Delays execution with timeout.exe
        PID:1912

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/584-115-0x0000000002E39000-0x0000000002E4A000-memory.dmp

        memory/584-116-0x0000000002C60000-0x0000000002DAA000-memory.dmp

        memory/584-117-0x0000000000400000-0x0000000002BB0000-memory.dmp