Overview

overview

10

Static

static

case (4374).xls

windows7_x64

10

case (4374).xls

windows10_x64

10

Analysis

  • max time kernel
    139s
  • max time network
    134s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    26/01/2021, 20:24

Sharing

Copy URL Twitter E-mail
Report Analysis Logs

General

  • Target
    case (4374).xls
  • Size 153KB
  • Sample210126-srjs948kde
  • SHA256 28ce05e2ebeec4b1754d5ffcfe3e4486e8e9201f375da899aef2ea6d3b02dd60
  • MD5 SHA1 SHA512
Score
10/10
ransomware

Malware Config

Signatures

  • Process spawned unexpected child process 1 IoCs

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

  • Blocklisted process makes network request 4 IoCs
  • Loads dropped DLL 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

    ransomware
  • Suspicious use of SetThreadContext 1 IoCs
  • Checks processor information in registry 2 TTPs 3 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 12 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
    "C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\case (4374).xls"
    1⤵
    • Checks processor information in registry
    • Enumerates system info in registry
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1048
    • C:\Windows\System32\rundll32.exe
      "C:\Windows\System32\rundll32.exe" C:\ProgramData\formnet.dll,DllRegisterServer
      2⤵
      • Process spawned unexpected child process
      • Suspicious use of WriteProcessMemory
      PID:296
      • C:\Windows\SysWOW64\rundll32.exe
        "C:\Windows\System32\rundll32.exe" C:\ProgramData\formnet.dll,DllRegisterServer
        3⤵
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:640
        • C:\Windows\SysWOW64\msiexec.exe
          msiexec.exe
          4⤵
          • Blocklisted process makes network request
          • Suspicious use of AdjustPrivilegeToken
          PID:1636

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        memory/640-11-0x0000000000400000-0x0000000000426000-memory.dmp
        Download

        memory/640-12-0x0000000003290000-0x0000000003291000-memory.dmp
        Download

        memory/1048-6-0x00007FFA6A590000-0x00007FFA6ABC7000-memory.dmp
        Download

        memory/1048-5-0x00007FFA46D50000-0x00007FFA46D60000-memory.dmp
        Download

        memory/1048-4-0x00007FFA46D50000-0x00007FFA46D60000-memory.dmp
        Download

        memory/1048-3-0x00007FFA46D50000-0x00007FFA46D60000-memory.dmp
        Download

        memory/1048-2-0x00007FFA46D50000-0x00007FFA46D60000-memory.dmp
        Download

        memory/1636-14-0x0000000002ED0000-0x0000000002EF6000-memory.dmp
        Download