Analysis

  • max time kernel
    82s
  • max time network
    145s
  • platform
    windows10_x64
  • resource
    win10
  • submitted
    10/07/2020, 10:21

General

  • Target
    62231fa0b731bd0aac1c55bd8ed15898.exe
  • Size 242KB
  • Sample200710-mbeh8c7r5a
  • SHA256 b699a2766f106ff77377780bad431b72ef1748bf989e09f2b82fb73cf30cbde3
  • 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.

  • Downloads MZ/PE file
  • Executes dropped EXE 6 IoCs
  • 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 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.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 3 IoCs
  • 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 AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\62231fa0b731bd0aac1c55bd8ed15898.exe
    "C:\Users\Admin\AppData\Local\Temp\62231fa0b731bd0aac1c55bd8ed15898.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3100
    • C:\Users\Admin\AppData\Local\Temp\osaz.exe
      "C:\Users\Admin\AppData\Local\Temp\osaz.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      PID:3276
      • C:\Users\Admin\AppData\Local\Temp\osaz.exe
        "{path}"
        3⤵
        • Executes dropped EXE
        PID:3136
    • C:\Users\Admin\AppData\Local\Temp\62231fa0b731bd0aac1c55bd8ed15898.exe
      "{path}"
      2⤵
      • Loads dropped DLL
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3912
      • C:\Users\Admin\AppData\Local\Temp\rc.exe
        "C:\Users\Admin\AppData\Local\Temp\rc.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:632
        • C:\Windows\SysWOW64\TapiUnattend.exe
          "C:\Windows\System32\TapiUnattend.exe"
          4⤵
            PID:2160
        • C:\Users\Admin\AppData\Local\Temp\ac.exe
          "C:\Users\Admin\AppData\Local\Temp\ac.exe"
          3⤵
          • Executes dropped EXE
          PID:852
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 852 -s 948
            4⤵
            • Program crash
            PID:4044
        • C:\Users\Admin\AppData\Local\Temp\ds1.exe
          "C:\Users\Admin\AppData\Local\Temp\ds1.exe"
          3⤵
          • Executes dropped EXE
          PID:364
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 364 -s 912
            4⤵
            • Program crash
            • Suspicious use of AdjustPrivilegeToken
            PID:3856
        • C:\Users\Admin\AppData\Local\Temp\ds2.exe
          "C:\Users\Admin\AppData\Local\Temp\ds2.exe"
          3⤵
          • Executes dropped EXE
          PID:1176
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 1176 -s 912
            4⤵
            • Program crash
            PID:1112
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\system32\cmd.exe" /c C:\Windows\system32\timeout.exe 3 & del "62231fa0b731bd0aac1c55bd8ed15898.exe"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1492
          • C:\Windows\SysWOW64\timeout.exe
            C:\Windows\system32\timeout.exe 3
            4⤵
            • Delays execution with timeout.exe
            PID:1800

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          memory/1112-155-0x0000000004100000-0x0000000004101000-memory.dmp

          memory/3136-140-0x0000000000400000-0x0000000000438000-memory.dmp

          memory/3136-135-0x0000000000400000-0x0000000000438000-memory.dmp

          memory/3856-153-0x0000000004B30000-0x0000000004B31000-memory.dmp

          memory/3912-7-0x0000000000400000-0x0000000000420000-memory.dmp

          memory/3912-5-0x0000000000400000-0x0000000000420000-memory.dmp

          memory/4044-154-0x0000000004D00000-0x0000000004D01000-memory.dmp