Analysis

  • max time kernel
    125s
  • max time network
    105s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    29-01-2021 14:38

General

  • Target

    Y6YUOzu5ynWpiPp.exe

  • Size

    738KB

  • MD5

    634e050470e5dd1bbe3a70eb8e728246

  • SHA1

    545edebaf3e37197a4fcc75b4e0c2ee0af225ef2

  • SHA256

    6eb0affd63b0d85be603948881fc6b643103e96e3f68acf1350969e8d09cc7e1

  • SHA512

    f3085d7193a7ecd74f26d650a2ad56d4b66fc81ef2928e2c413438775deb3d27cc5e22ca0f0fc94700f10c8456de56c1ab745c20b2b69cee11ff73e0d4f52179

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yatchbabara.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    j$Mk$NE7

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • AgentTesla Payload 2 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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Y6YUOzu5ynWpiPp.exe
    "C:\Users\Admin\AppData\Local\Temp\Y6YUOzu5ynWpiPp.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4772
    • C:\Users\Admin\AppData\Local\Temp\Y6YUOzu5ynWpiPp.exe
      "{path}"
      2⤵
        PID:528
      • C:\Users\Admin\AppData\Local\Temp\Y6YUOzu5ynWpiPp.exe
        "{path}"
        2⤵
          PID:568
        • C:\Users\Admin\AppData\Local\Temp\Y6YUOzu5ynWpiPp.exe
          "{path}"
          2⤵
          • Adds Run key to start application
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:676

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Persistence

      Registry Run Keys / Startup Folder

      1
      T1060

      Defense Evasion

      Modify Registry

      1
      T1112

      Credential Access

      Credentials in Files

      3
      T1081

      Collection

      Data from Local System

      3
      T1005

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • memory/676-12-0x0000000000400000-0x000000000043C000-memory.dmp
        Filesize

        240KB

      • memory/676-24-0x0000000005511000-0x0000000005512000-memory.dmp
        Filesize

        4KB

      • memory/676-21-0x0000000006110000-0x0000000006111000-memory.dmp
        Filesize

        4KB

      • memory/676-20-0x00000000054F0000-0x00000000054F1000-memory.dmp
        Filesize

        4KB

      • memory/676-19-0x0000000005510000-0x0000000005511000-memory.dmp
        Filesize

        4KB

      • memory/676-14-0x0000000073150000-0x000000007383E000-memory.dmp
        Filesize

        6.9MB

      • memory/676-13-0x00000000004375DE-mapping.dmp
      • memory/4772-7-0x0000000005670000-0x0000000005671000-memory.dmp
        Filesize

        4KB

      • memory/4772-11-0x0000000007A40000-0x0000000007AA0000-memory.dmp
        Filesize

        384KB

      • memory/4772-10-0x00000000058B0000-0x00000000058B1000-memory.dmp
        Filesize

        4KB

      • memory/4772-9-0x0000000007AE0000-0x0000000007AE1000-memory.dmp
        Filesize

        4KB

      • memory/4772-8-0x0000000005790000-0x0000000005794000-memory.dmp
        Filesize

        16KB

      • memory/4772-2-0x0000000073150000-0x000000007383E000-memory.dmp
        Filesize

        6.9MB

      • memory/4772-6-0x00000000056F0000-0x00000000056F1000-memory.dmp
        Filesize

        4KB

      • memory/4772-5-0x0000000005CB0000-0x0000000005CB1000-memory.dmp
        Filesize

        4KB

      • memory/4772-3-0x0000000000D90000-0x0000000000D91000-memory.dmp
        Filesize

        4KB