Analysis

  • max time kernel
    130s
  • max time network
    137s
  • platform
    windows7_x64
  • resource
    win7
  • submitted
    09/07/2020, 17:30

General

  • Target

    RFQ 2O8372929_PDF.exe

  • Size

    553KB

  • MD5

    4239c1115b482a8cf2d015480e6e54b0

  • SHA1

    9c85da548aaaef07e9a4f0f00534a869b8e60bd1

  • SHA256

    e0946b05635011f81ce5534b1d49bec2dd2cb184af87c7ebea2f55d91e0a07cf

  • SHA512

    d1db3625db842984c2aba9266590e0dcaa1b3946fb0df4173f041b4d1407e952d65d347f727cc4a0f4e5ccf9467e7142395655ba9f615d6e4b8f4e92fb6458d3

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yandex.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    blessing2020

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 WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\RFQ 2O8372929_PDF.exe
    "C:\Users\Admin\AppData\Local\Temp\RFQ 2O8372929_PDF.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1460
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\WRBGCktxQn" /XML "C:\Users\Admin\AppData\Local\Temp\tmp956B.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1012
    • C:\Users\Admin\AppData\Local\Temp\RFQ 2O8372929_PDF.exe
      "{path}"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1644

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1644-4-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/1644-6-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/1644-7-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB