Analysis

  • max time kernel
    90s
  • max time network
    48s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    12-07-2022 14:32

General

  • Target

    SOA APRIL.exe

  • Size

    414KB

  • MD5

    8cf823ee0766126638d33918383ca5d8

  • SHA1

    3b215b084b9ff049a860fc29108f62c4b6d2133b

  • SHA256

    6de7efc9e04cb4db0acc603a7ed700b186d0545acd0e8e84a1d8cce668202dc8

  • SHA512

    41cd0278ebb15faddd178fb826e8dc74021980f09b94ff785b1b6d88d5504c2e7b37450484666fd7a00e3c3e865459ace696c41ad84e4d0630d1ef893e93ed94

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.cpworldindia.com
  • Port:
    587
  • Username:
    import.cs@ahd.cpworldindia.com
  • Password:
    imprtcs@2019

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.

  • Disables Task Manager via registry modification
  • Drops file in Drivers directory 1 IoCs
  • 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.

  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SOA APRIL.exe
    "C:\Users\Admin\AppData\Local\Temp\SOA APRIL.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1800
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\FzcrWS" /XML "C:\Users\Admin\AppData\Local\Temp\tmp31D.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:996
    • C:\Users\Admin\AppData\Local\Temp\SOA APRIL.exe
      "{path}"
      2⤵
      • Drops file in Drivers directory
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:1680
      • 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:452
      • C:\Windows\SysWOW64\netsh.exe
        "netsh" wlan show profile
        3⤵
          PID:1004

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Scheduled Task

    1
    T1053

    Persistence

    Scheduled Task

    1
    T1053

    Privilege Escalation

    Scheduled Task

    1
    T1053

    Defense Evasion

    Modify Registry

    1
    T1112

    Credential Access

    Credentials in Files

    3
    T1081

    Discovery

    System Information Discovery

    1
    T1082

    Collection

    Data from Local System

    3
    T1005

    Email Collection

    1
    T1114

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmp31D.tmp
      Filesize

      1KB

      MD5

      14d6dd7fd4cbc5a808cbaa4d88f20312

      SHA1

      474cedd366d6691b96d29581c7c606e5f217608b

      SHA256

      e994b340ec41b58072f693a1fbcef7ef0005c196f8d715518fd8af3c1a8ef2d9

      SHA512

      a4dd325dd0c9fae25e0130a7b0ca933dbf669001139968df4e0d01d03b6042d59fce1902424155bf324fa1ddec8b7f1560465b117468ae63cff090ce6f13ea14

    • memory/452-72-0x0000000000000000-mapping.dmp
    • memory/996-58-0x0000000000000000-mapping.dmp
    • memory/1004-73-0x0000000000000000-mapping.dmp
    • memory/1680-63-0x0000000000400000-0x0000000000452000-memory.dmp
      Filesize

      328KB

    • memory/1680-60-0x0000000000400000-0x0000000000452000-memory.dmp
      Filesize

      328KB

    • memory/1680-61-0x0000000000400000-0x0000000000452000-memory.dmp
      Filesize

      328KB

    • memory/1680-64-0x0000000000400000-0x0000000000452000-memory.dmp
      Filesize

      328KB

    • memory/1680-65-0x0000000000400000-0x0000000000452000-memory.dmp
      Filesize

      328KB

    • memory/1680-66-0x000000000044C91E-mapping.dmp
    • memory/1680-68-0x0000000000400000-0x0000000000452000-memory.dmp
      Filesize

      328KB

    • memory/1680-70-0x0000000000400000-0x0000000000452000-memory.dmp
      Filesize

      328KB

    • memory/1800-57-0x00000000043F0000-0x0000000004448000-memory.dmp
      Filesize

      352KB

    • memory/1800-54-0x0000000000A20000-0x0000000000A8E000-memory.dmp
      Filesize

      440KB

    • memory/1800-56-0x0000000000590000-0x0000000000598000-memory.dmp
      Filesize

      32KB

    • memory/1800-55-0x0000000074E91000-0x0000000074E93000-memory.dmp
      Filesize

      8KB