Analysis

  • max time kernel
    78s
  • max time network
    111s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    17/12/2020, 07:47

General

  • Target
    http___webmaildocumentdownload.duckdns.org_win10.exe
  • Size 508KB
  • Sample201217-67nydfd3dj
  • SHA256 5822fa47a5eab9578ec51ee113a156f455c6c8f60ce80d084663c2f31fe25e91
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • azorult

C2
  • http://195.245.112.115/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 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.

  • JavaScript code in executable 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\http___webmaildocumentdownload.duckdns.org_win10.exe
    "C:\Users\Admin\AppData\Local\Temp\http___webmaildocumentdownload.duckdns.org_win10.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:816
    • C:\Users\Admin\AppData\Local\Temp\http___webmaildocumentdownload.duckdns.org_win10.exe
      "{path}"
      2⤵
      • Loads dropped DLL
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:1976

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/816-18-0x0000000008290000-0x00000000082E6000-memory.dmp

        memory/816-13-0x0000000004F80000-0x0000000004F81000-memory.dmp

        memory/816-14-0x000000000A370000-0x000000000A371000-memory.dmp

        memory/816-17-0x0000000005440000-0x000000000544E000-memory.dmp

        memory/816-2-0x0000000074070000-0x000000007475E000-memory.dmp

        memory/816-19-0x0000000008A40000-0x0000000008A41000-memory.dmp

        memory/816-9-0x0000000004FF0000-0x0000000004FF1000-memory.dmp

        memory/816-6-0x0000000005450000-0x0000000005451000-memory.dmp

        memory/816-5-0x00000000070D0000-0x0000000007122000-memory.dmp

        memory/816-3-0x0000000000380000-0x0000000000381000-memory.dmp

        memory/1976-22-0x0000000000400000-0x0000000000420000-memory.dmp

        memory/1976-20-0x0000000000400000-0x0000000000420000-memory.dmp