Analysis

  • max time kernel
    90s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    20-05-2022 23:31

General

  • Target

    E410B98888.exe

  • Size

    1.7MB

  • MD5

    4fb67120185f1f35a4ee966dd8673eb7

  • SHA1

    563837b69516b71eaf64d5bcedf014adbbc45f07

  • SHA256

    184f804223ad564aad94a727a9d58543e2d01a308902c95eb328016739938a90

  • SHA512

    974c0a2e1f41ea34b29fed609ab9765d6d2c5e352263c367078373be1bd9d8a6032cf75e8b0ebf88de6af90df8cc9154a8a1182a43d4804b0bfaeb83adfa3c75

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    mail.ashpraskills.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    TC041018$4321

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.ashpraskills.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    TC041018$4321

Signatures

  • AgentTesla

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

  • MassLogger

    Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.

  • MassLogger Main Payload 3 IoCs
  • AgentTesla Payload 2 IoCs
  • Executes dropped EXE 2 IoCs
  • 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 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 25 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\E410B98888.exe
    "C:\Users\Admin\AppData\Local\Temp\E410B98888.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4288
    • C:\Users\Admin\Desktop\wiseman.exe
      "C:\Users\Admin\Desktop\wiseman.exe"
      2⤵
      • Executes dropped EXE
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • outlook_office_path
      • outlook_win_path
      PID:852
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v Administrator /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\Desktop\.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4856
      • C:\Windows\SysWOW64\reg.exe
        REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v Administrator /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\Desktop\.exe"
        3⤵
        • Adds Run key to start application
        PID:4028
    • C:\Users\Admin\Desktop\.exe
      "C:\Users\Admin\Desktop\.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4060
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4060 -s 1272
        3⤵
        • Program crash
        PID:3432
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 4060 -ip 4060
    1⤵
      PID:1268

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\Desktop\.exe

      Filesize

      1.7MB

      MD5

      4fb67120185f1f35a4ee966dd8673eb7

      SHA1

      563837b69516b71eaf64d5bcedf014adbbc45f07

      SHA256

      184f804223ad564aad94a727a9d58543e2d01a308902c95eb328016739938a90

      SHA512

      974c0a2e1f41ea34b29fed609ab9765d6d2c5e352263c367078373be1bd9d8a6032cf75e8b0ebf88de6af90df8cc9154a8a1182a43d4804b0bfaeb83adfa3c75

    • C:\Users\Admin\Desktop\.exe

      Filesize

      1.7MB

      MD5

      4fb67120185f1f35a4ee966dd8673eb7

      SHA1

      563837b69516b71eaf64d5bcedf014adbbc45f07

      SHA256

      184f804223ad564aad94a727a9d58543e2d01a308902c95eb328016739938a90

      SHA512

      974c0a2e1f41ea34b29fed609ab9765d6d2c5e352263c367078373be1bd9d8a6032cf75e8b0ebf88de6af90df8cc9154a8a1182a43d4804b0bfaeb83adfa3c75

    • C:\Users\Admin\Desktop\wiseman.exe

      Filesize

      278KB

      MD5

      0922444ce8a37462f57e07a420acf1a7

      SHA1

      a6442229acbd46d3a4cf5f45630ca98a74f18d0f

      SHA256

      bab0b51695e2e35875154c4aba680fd1800dbbba36ef1f48cd437616eac8cdc5

      SHA512

      24cfd983469e0f6926969a9ee9201df6eed891c895ec7db328944feda2ebcbac20c11bffdd15e831aae64dd4d1bf45f442f2be4306d837f045ced245597a6a2c

    • C:\Users\Admin\Desktop\wiseman.exe

      Filesize

      278KB

      MD5

      0922444ce8a37462f57e07a420acf1a7

      SHA1

      a6442229acbd46d3a4cf5f45630ca98a74f18d0f

      SHA256

      bab0b51695e2e35875154c4aba680fd1800dbbba36ef1f48cd437616eac8cdc5

      SHA512

      24cfd983469e0f6926969a9ee9201df6eed891c895ec7db328944feda2ebcbac20c11bffdd15e831aae64dd4d1bf45f442f2be4306d837f045ced245597a6a2c

    • memory/852-139-0x000000006D530000-0x000000006DAE1000-memory.dmp

      Filesize

      5.7MB

    • memory/4288-133-0x0000000007380000-0x00000000073C4000-memory.dmp

      Filesize

      272KB

    • memory/4288-130-0x00000000007F0000-0x00000000009A4000-memory.dmp

      Filesize

      1.7MB

    • memory/4288-132-0x00000000059E0000-0x0000000005A72000-memory.dmp

      Filesize

      584KB

    • memory/4288-131-0x0000000005E80000-0x0000000006424000-memory.dmp

      Filesize

      5.6MB