Analysis

  • max time kernel
    190s
  • max time network
    199s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    21-05-2022 11:17

General

  • Target

    BL & Original Shipping Documents AWB-62987268.exe

  • Size

    731KB

  • MD5

    7236e60628c25d1b48ae9de6eb5e6b8c

  • SHA1

    486cab73374fc98b369a1caf19bc2fc7c9285ad1

  • SHA256

    8ac57ec0d32b453aa23a1c7149d5cd5695c8a99a9bd0b792bfc1411b1216c4da

  • SHA512

    32e489c7ad82171d9349d7a89191d222aa3f784e462589345f3d1a010e63c024cd08232844d529d3396b60c505b3ef35f9378cea2c6efdd094e4b94c58d72873

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yandex.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    drsaint1992101

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yandex.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    drsaint1992101

Signatures

  • AgentTesla

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

  • AgentTesla Payload 1 IoCs
  • Disables RegEdit via registry modification
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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
  • Adds Run key to start application 2 TTPs 1 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.

  • Program crash 1 IoCs
  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Modifies registry key 1 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\BL & Original Shipping Documents AWB-62987268.exe
    "C:\Users\Admin\AppData\Local\Temp\BL & Original Shipping Documents AWB-62987268.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2292
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\CdKZXCSedTjRc" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB277.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:4956
    • C:\Users\Admin\AppData\Local\Temp\BL & Original Shipping Documents AWB-62987268.exe
      "{path}"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: RenamesItself
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:4164
      • C:\Windows\SysWOW64\REG.exe
        REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System / v DisableTaskMgr / t REG_DWORD / d 1 / f
        3⤵
        • Modifies registry key
        PID:3428
      • C:\Windows\SysWOW64\REG.exe
        REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer / v NoRun / t REG_DWORD / d 1 / f
        3⤵
        • Modifies registry key
        PID:3864
      • C:\Windows\SysWOW64\REG.exe
        REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer / v NoControlPanel / t REG_DWORD / d 1 / f
        3⤵
        • Modifies registry key
        PID:1096
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4164 -s 2128
        3⤵
        • Program crash
        PID:2960
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 4164 -ip 4164
    1⤵
      PID:1464

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\BL & Original Shipping Documents AWB-62987268.exe.log

      Filesize

      685B

      MD5

      64f7d1001f1b3c983776387519079574

      SHA1

      9696fb5ffd5597c12fc1ca6bcb7fe889f8cc9c2c

      SHA256

      b7724fa480f240bb6e0131973d0f085d5fb0865677f277a2a306f4fa89c89485

      SHA512

      bf81147d1a43290c845f788fbe633bf0ae8abff31a342b0278e525fdf65bd5294e797b3a11f375027e5b2c42d224459583d5a0e753f563d5034d4d7653d39eba

    • C:\Users\Admin\AppData\Local\Temp\tmpB277.tmp

      Filesize

      1KB

      MD5

      e15ef74c3535491599071324783cf5b9

      SHA1

      4a2eac8a07b36efc82a784fa3a955252f3e10766

      SHA256

      c0dac7ea75a5bbeba9ffdd822a0d90c974efea4cd09e70c83146469ef721289c

      SHA512

      510c0d7961e13f8abf68c43e9b80d8679103d7d9c8a4b53d429a792e585bf3b8d5967a451382689d213fe80fcebbdc45e2327d9fde29c097063d363219a90e0e

    • memory/1096-144-0x0000000000000000-mapping.dmp

    • memory/2292-132-0x00000000056E0000-0x0000000005772000-memory.dmp

      Filesize

      584KB

    • memory/2292-133-0x00000000064D0000-0x0000000006656000-memory.dmp

      Filesize

      1.5MB

    • memory/2292-134-0x0000000005C40000-0x0000000005CDC000-memory.dmp

      Filesize

      624KB

    • memory/2292-130-0x0000000000C90000-0x0000000000D4E000-memory.dmp

      Filesize

      760KB

    • memory/2292-131-0x0000000005D90000-0x0000000006334000-memory.dmp

      Filesize

      5.6MB

    • memory/3428-142-0x0000000000000000-mapping.dmp

    • memory/3864-143-0x0000000000000000-mapping.dmp

    • memory/4164-141-0x0000000006B10000-0x0000000006B60000-memory.dmp

      Filesize

      320KB

    • memory/4164-140-0x0000000005DE0000-0x0000000005E46000-memory.dmp

      Filesize

      408KB

    • memory/4164-138-0x0000000000400000-0x000000000044C000-memory.dmp

      Filesize

      304KB

    • memory/4164-137-0x0000000000000000-mapping.dmp

    • memory/4956-135-0x0000000000000000-mapping.dmp