Analysis

  • max time kernel
    118s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    01-02-2022 03:25

General

  • Target

    e21010888e225acdde63d87ce30b68ab61c12ee91400820d3c151e0f0daacd1a.xlsm

  • Size

    329KB

  • MD5

    8ade3b8c742363c77c3ed28e604f1fe8

  • SHA1

    c2bec21e2069d78792b15ac6e14f1ad1c7488870

  • SHA256

    e21010888e225acdde63d87ce30b68ab61c12ee91400820d3c151e0f0daacd1a

  • SHA512

    9312a754f725338c35faa890bf95410b9108e3b79ca5af9939a20158132c81480e5224b9a672bf82996a9b25810233977035c89a934430330dd53ca5ab955612

Score
10/10

Malware Config

Signatures

  • Ostap JavaScript Downloader 1 IoCs

    Ostap is a JavaScript downloader that's been active since 2016. It's used to deliver several families, inluding TrickBot

  • Process spawned unexpected child process 1 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • ostap

    Ostap is a JS downloader, used to deliver other families.

  • Office loads VBA resources, possible macro or embedded object present
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of SetWindowsHookEx 7 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\e21010888e225acdde63d87ce30b68ab61c12ee91400820d3c151e0f0daacd1a.xlsm
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1128
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:804
      • C:\Windows\SysWOW64\explorer.exe
        "C:\Windows\System32\explorer.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\..\..\..\..\..\Sheet133.exit.jse"
        2⤵
        • Process spawned unexpected child process
        PID:604
    • C:\Windows\explorer.exe
      C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:1988
      • C:\Windows\System32\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\Sheet133.exit.jse"
        2⤵
          PID:1692

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • memory/604-62-0x000000006BF51000-0x000000006BF53000-memory.dmp

        Filesize

        8KB

      • memory/804-60-0x000007FEFB781000-0x000007FEFB783000-memory.dmp

        Filesize

        8KB

      • memory/1128-55-0x000000002F211000-0x000000002F214000-memory.dmp

        Filesize

        12KB

      • memory/1128-56-0x0000000070F71000-0x0000000070F73000-memory.dmp

        Filesize

        8KB

      • memory/1128-57-0x000000005FFF0000-0x0000000060000000-memory.dmp

        Filesize

        64KB

      • memory/1128-58-0x0000000075421000-0x0000000075423000-memory.dmp

        Filesize

        8KB

      • memory/1128-59-0x0000000005AD0000-0x0000000005AD2000-memory.dmp

        Filesize

        8KB

      • memory/1128-65-0x000000005FFF0000-0x0000000060000000-memory.dmp

        Filesize

        64KB