Analysis

  • max time kernel
    152s
  • max time network
    181s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    20-05-2022 22:56

General

  • Target

    MT103.exe

  • Size

    446KB

  • MD5

    50a9dad5978b55b81a7fb08506479570

  • SHA1

    648be1895b2d47d2132dceec7d18bfa43486ee4c

  • SHA256

    7815b27fca27429b09059eda7dfe2f60012d73463ab15b95d6eb624f1f7681ff

  • SHA512

    764f8c7ea986dc5348f1c87373894126b2c385359c36c0d70783e311634111fd3a1fc8bef476ab6bcc8db08a0d53e57cfd312a3696885442f9315a2edbceea8f

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yandex.ru
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    Pussy12345

Signatures

  • AgentTesla

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

  • AgentTesla Payload 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\MT103.exe
    "C:\Users\Admin\AppData\Local\Temp\MT103.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1356
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\XXEsoHSDrof" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4707.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:4580
    • C:\Users\Admin\AppData\Local\Temp\MT103.exe
      "{path}"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:3460
      • C:\Windows\SysWOW64\netsh.exe
        "netsh" wlan show profile
        3⤵
          PID:3324

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\MT103.exe.log

      Filesize

      408B

      MD5

      8adbb2cb7759fdcbc51cfbf0bfd7c867

      SHA1

      f7549e6ea430e7d64b3afb3fc27c77ed5122f85b

      SHA256

      c67092561e4b1472672374c3439004e2bc0191d9a901cde2b8b69a2d34dc6297

      SHA512

      f465311e884dd82e3152959b6a59ac8d6be0a056a1cfddabbcc6714079a2269cd5c09b2b8fbc87a9ec3323c531383526ae19ef24fed100dec80730fae0d79991

    • C:\Users\Admin\AppData\Local\Temp\tmp4707.tmp

      Filesize

      1KB

      MD5

      432b88d6d5b45a981ad4b500d4ecd129

      SHA1

      2ba337e060989d436ee5a3b2ede4aef3bcf8ec5a

      SHA256

      c5f6b8b80ab4c3069fcdd4d0a57c129b8efbddc41db1adeed387d18446e55aaa

      SHA512

      081e920f2b9565fb8ed40d0d435c38749066842137b22793428b4eb1bd104fc280ded09099d9aad4b241519d0b602a6a2d0b8c317baf29609cf7262d7dd5e33f

    • memory/1356-130-0x0000000075000000-0x00000000755B1000-memory.dmp

      Filesize

      5.7MB

    • memory/3324-137-0x0000000000000000-mapping.dmp

    • memory/3460-133-0x0000000000000000-mapping.dmp

    • memory/3460-134-0x0000000000400000-0x0000000000452000-memory.dmp

      Filesize

      328KB

    • memory/3460-136-0x0000000075000000-0x00000000755B1000-memory.dmp

      Filesize

      5.7MB

    • memory/4580-131-0x0000000000000000-mapping.dmp