Analysis

  • max time kernel
    138s
  • max time network
    48s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 11:23

General

  • Target

    ab4da6a6eb17001b2427284b5007cd62a6cf724ba1546a13420a40fb4ecde06d.exe

  • Size

    553KB

  • MD5

    0d9af17e7af59794c369d1c480a4dc1d

  • SHA1

    3d74c23fecabe7389aedd61b07f0ab23cf11ecdd

  • SHA256

    ab4da6a6eb17001b2427284b5007cd62a6cf724ba1546a13420a40fb4ecde06d

  • SHA512

    a55bec9c2e0e5ea0e64b8366c012db07a53b15facbb857786548ca9ef2631a6279d76f537c834df7ce0b7da3d87db6b65e936f112e767b9eaa12243a0cea9cc2

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yandex.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    333link00win0303

Signatures

  • AgentTesla

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

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\ab4da6a6eb17001b2427284b5007cd62a6cf724ba1546a13420a40fb4ecde06d.exe
    "C:\Users\Admin\AppData\Local\Temp\ab4da6a6eb17001b2427284b5007cd62a6cf724ba1546a13420a40fb4ecde06d.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:360
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\LyCgiShv" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE715.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1224
    • C:\Users\Admin\AppData\Local\Temp\ab4da6a6eb17001b2427284b5007cd62a6cf724ba1546a13420a40fb4ecde06d.exe
      "{path}"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:1148
      • C:\Windows\SysWOW64\netsh.exe
        "netsh" wlan show profile
        3⤵
          PID:1192

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmpE715.tmp

      Filesize

      1KB

      MD5

      225155543e1cfaacdbe0c2a5cae32808

      SHA1

      1f0b4f31a2b8f5a53f20904ed1f13a671cfbd008

      SHA256

      377d0735568289718b51fc7b75423a53a44a5b1a40baaeed7ce0bb50ea23295d

      SHA512

      a1250e138c1507dffb3799f37af11feeec37b1ef07e703c49501c189a5f3bed9b9de1ae2e11ce398a2230727907d76d55d0b4b910432e1dbd97e9d654c8324cf

    • memory/360-55-0x0000000000420000-0x0000000000436000-memory.dmp

      Filesize

      88KB

    • memory/360-56-0x0000000000BF0000-0x0000000000C48000-memory.dmp

      Filesize

      352KB

    • memory/360-57-0x0000000075E31000-0x0000000075E33000-memory.dmp

      Filesize

      8KB

    • memory/360-54-0x00000000011F0000-0x0000000001280000-memory.dmp

      Filesize

      576KB

    • memory/1148-60-0x0000000000400000-0x0000000000452000-memory.dmp

      Filesize

      328KB

    • memory/1148-61-0x0000000000400000-0x0000000000452000-memory.dmp

      Filesize

      328KB

    • memory/1148-63-0x0000000000400000-0x0000000000452000-memory.dmp

      Filesize

      328KB

    • memory/1148-64-0x0000000000400000-0x0000000000452000-memory.dmp

      Filesize

      328KB

    • memory/1148-66-0x000000000044C7AE-mapping.dmp

    • memory/1148-65-0x0000000000400000-0x0000000000452000-memory.dmp

      Filesize

      328KB

    • memory/1148-68-0x0000000000400000-0x0000000000452000-memory.dmp

      Filesize

      328KB

    • memory/1148-70-0x0000000000400000-0x0000000000452000-memory.dmp

      Filesize

      328KB

    • memory/1192-72-0x0000000000000000-mapping.dmp

    • memory/1224-58-0x0000000000000000-mapping.dmp