Analysis

  • max time kernel
    147s
  • max time network
    27s
  • platform
    windows7_x64
  • resource
    win7v200430
  • submitted
    09-07-2020 14:28

General

  • Target

    Over.exe

  • Size

    565KB

  • MD5

    93da8515438ce678f4524bb46b730944

  • SHA1

    63298cd943c95a626e6b129cb0628011304ef0c7

  • SHA256

    b064d18c661ab69f54f7a4f1c1ea167553a6a324a859271a17203f2741a22c8e

  • SHA512

    694f7cbf1593a42db90e951afbb7e590637f20e127165add34f5e049050abf1fcc0237a9c5b172fc47a2acd2e58814de9bad856880e8e13f49430322c87271cb

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.mexicanproduct.com.mx
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    Produccion2020.

Signatures

  • AgentTesla

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

  • AgentTesla Payload 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.

  • 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 SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Over.exe
    "C:\Users\Admin\AppData\Local\Temp\Over.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1232
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\XAznNXTNlFz" /XML "C:\Users\Admin\AppData\Local\Temp\tmp531E.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1836
    • C:\Users\Admin\AppData\Local\Temp\Over.exe
      "{path}"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:1784

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp531E.tmp

    MD5

    4efdac18a79b23b618760ebfb57a75df

    SHA1

    c5b4269b8c3b4aa56028290871216ef5508db4f3

    SHA256

    eed9e241e32ed0bc32b34b60fcb29a57b3eda316f046e96afbfc7e5e8d951f23

    SHA512

    198455b703bbaa5d7c52cc60b4fed7ce233f800f7e9ab0ebc507fb70c68f7759dc7adc950ecbb3d21a36dbf3138f0c74e5960285dc1bf47aaf86cbd2c5f6420e

  • memory/1232-1-0x0000000000000000-0x0000000000000000-disk.dmp

  • memory/1784-4-0x0000000000400000-0x000000000044E000-memory.dmp

    Filesize

    312KB

  • memory/1784-5-0x000000000044983E-mapping.dmp

  • memory/1784-6-0x0000000000400000-0x000000000044E000-memory.dmp

    Filesize

    312KB

  • memory/1784-7-0x0000000000400000-0x000000000044E000-memory.dmp

    Filesize

    312KB

  • memory/1836-2-0x0000000000000000-mapping.dmp