Overview

overview

10

Static

static

8

559b4ec0b9...a0.xls

windows7_x64

10

559b4ec0b9...a0.xls

windows10_x64

10

Analysis

  • max time kernel
    136s
  • max time network
    143s
  • platform
    windows7_x64
  • resource
    win7v200722
  • submitted
    06/10/2020, 14:22

Sharing

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General

  • Target
    559b4ec0b99a8e268d3dddd0c6a73f04317cdc9f597255fd1ce90015dfcfaea0.xls
  • Size 1.6MB
  • Sample201006-696kpg4dpx
  • SHA256 559b4ec0b99a8e268d3dddd0c6a73f04317cdc9f597255fd1ce90015dfcfaea0
  • MD5 SHA1 SHA512
Score
10/10
ostapdownloader

Malware Config

Signatures

  • 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.

    downloaderostap
  • Blocklisted process makes network request 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Office loads VBA resources, possible macro or embedded object present
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Program Files\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\559b4ec0b99a8e268d3dddd0c6a73f04317cdc9f597255fd1ce90015dfcfaea0.xls
    1⤵
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1480
    • C:\Windows\System32\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\ProgramData\dot.jpegom.jse"
      2⤵
      • Process spawned unexpected child process
      • Blocklisted process makes network request
      PID:1864

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/1480-0-0x00000000061E0000-0x00000000061E4000-memory.dmp
        Download

        memory/1480-1-0x0000000007F39000-0x0000000007F3D000-memory.dmp
        Download

        memory/1480-2-0x0000000007F39000-0x0000000007F3D000-memory.dmp
        Download

        memory/1480-3-0x00000000095D0000-0x00000000095D4000-memory.dmp
        Download

        memory/1480-4-0x0000000008083000-0x0000000008087000-memory.dmp
        Download

        memory/1480-5-0x0000000007F39000-0x0000000007F3D000-memory.dmp
        Download

        memory/1480-6-0x0000000008B3A000-0x0000000008B3C000-memory.dmp
        Download

        memory/1480-7-0x0000000008B37000-0x0000000008B3A000-memory.dmp
        Download

        memory/1480-8-0x0000000008B3A000-0x0000000008B3C000-memory.dmp
        Download