Analysis

  • max time kernel
    138s
  • max time network
    32s
  • platform
    windows7_x64
  • resource
    win7v200430
  • submitted
    07-07-2020 05:39

General

  • Target

    cotización.exe

  • Size

    553KB

  • MD5

    24c35b47082e767b4ac22680441e832f

  • SHA1

    dc2d57055bbcd9378d81944d8f599d036df64d30

  • SHA256

    c01753dd68c42bc2c0378b93891b424d671cfc6a58a8726e40fa9675122ea028

  • SHA512

    1e2fdd25ed01b96cfde47d9ada29b1b0d6b65b16d62298b4155e820effc99cb7489660dc5bb26b9cbf46874a7e22f0378a339acb485dcaccd0fd3386976b849b

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yandex.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    SENEGAL12345

Signatures

  • AgentTesla

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

  • AgentTesla Payload 4 IoCs
  • Looks for VirtualBox Guest Additions in registry 2 TTPs
  • Looks for VMWare Tools registry key 2 TTPs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Maps connected drives based on registry 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • 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 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cotización.exe
    "C:\Users\Admin\AppData\Local\Temp\cotización.exe"
    1⤵
    • Checks BIOS information in registry
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1492
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\KmsdsyKNaSj" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4A77.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:652
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "{path}"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:844

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp4A77.tmp

    MD5

    a4be62b9b3524e459b3e2613272e1de7

    SHA1

    d93c89477bb2fcb4d794f90557b99788efc1c2a5

    SHA256

    f40073cb6f9483f667d5f4ae771f35bdd22c098dc153bcdad232281f1d40a873

    SHA512

    0f1aa7b902287c91fe6d8a0e8657861527ed1d60156e5509cfd8eaef7c63ffe8c88de6adf1343c669ffcd352b291ee5c27e342ffb2bafc21e8fd5e252a460945

  • memory/652-2-0x0000000000000000-mapping.dmp

  • memory/844-4-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/844-5-0x0000000000446D2E-mapping.dmp

  • memory/844-6-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/844-7-0x0000000000400000-0x000000000044C000-memory.dmp

    Filesize

    304KB

  • memory/1492-1-0x0000000000000000-0x0000000000000000-disk.dmp