Analysis

  • max time kernel
    67s
  • max time network
    51s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 03:17

General

  • Target

    0020027409011933_05-13-2020.exe

  • Size

    402KB

  • MD5

    fbc66dd14f31214c68d15659f71219bf

  • SHA1

    36301d647b8549e60564c34063a4a8a7b7bd1b76

  • SHA256

    3e2931cb793d52c5e3253abd7efa9c5c5da9fe766cc93a012ff784fe48694c7a

  • SHA512

    578e2bad1dc7a5775d4b13b34cb75d054d554de7f53aa8cecc2f85bff594abd43a63fc9d1e06ba90745f225b3a17bc7fe40e78c0e2c13de51dee7240aff5c0d3

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.elhelado.com.mx
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    4042Ad@+

Signatures

  • AgentTesla

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

  • CoreEntity .NET Packer 1 IoCs

    A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

  • AgentTesla Payload 6 IoCs
  • ReZer0 packer 1 IoCs

    Detects ReZer0, a packer with multiple versions used in various campaigns.

  • 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 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0020027409011933_05-13-2020.exe
    "C:\Users\Admin\AppData\Local\Temp\0020027409011933_05-13-2020.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2036
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\HyjXbggHLexDHw" /XML "C:\Users\Admin\AppData\Local\Temp\tmpDD84.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2000
    • C:\Users\Admin\AppData\Local\Temp\0020027409011933_05-13-2020.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:1600
      • C:\Windows\SysWOW64\netsh.exe
        "netsh" wlan show profile
        3⤵
          PID:1100

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmpDD84.tmp

      Filesize

      1KB

      MD5

      758c5177ce532d480023a95785aba712

      SHA1

      f16a7885fc2e0b65177ccffc4c32d248f88cd84e

      SHA256

      b47568eabf6206a38761d4be3a79badeae8cd9f63b1e6c1fbf95da6b38a2f8d5

      SHA512

      4b3da1b99bf5f498f9e8c8ad6d77abbacaf0830c95e51095a075df3b2b0db88ec680967ff2914c67274f650d57df61f3627191e5b7f5aad71aae3d32d6b41210

    • memory/1100-72-0x0000000000000000-mapping.dmp

    • memory/1600-64-0x0000000000400000-0x0000000000450000-memory.dmp

      Filesize

      320KB

    • memory/1600-60-0x0000000000400000-0x0000000000450000-memory.dmp

      Filesize

      320KB

    • memory/1600-61-0x0000000000400000-0x0000000000450000-memory.dmp

      Filesize

      320KB

    • memory/1600-63-0x0000000000400000-0x0000000000450000-memory.dmp

      Filesize

      320KB

    • memory/1600-65-0x0000000000400000-0x0000000000450000-memory.dmp

      Filesize

      320KB

    • memory/1600-66-0x000000000044A49E-mapping.dmp

    • memory/1600-68-0x0000000000400000-0x0000000000450000-memory.dmp

      Filesize

      320KB

    • memory/1600-70-0x0000000000400000-0x0000000000450000-memory.dmp

      Filesize

      320KB

    • memory/2000-58-0x0000000000000000-mapping.dmp

    • memory/2036-57-0x0000000000730000-0x0000000000786000-memory.dmp

      Filesize

      344KB

    • memory/2036-56-0x0000000000410000-0x0000000000418000-memory.dmp

      Filesize

      32KB

    • memory/2036-54-0x0000000000B00000-0x0000000000B6A000-memory.dmp

      Filesize

      424KB

    • memory/2036-55-0x0000000075521000-0x0000000075523000-memory.dmp

      Filesize

      8KB