Overview

overview

8

Static

static

BA062ECC79...0B.exe

windows7_x64

8

BA062ECC79...0B.exe

windows10_x64

8

Analysis

  • max time kernel
    151s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    24/03/2021, 07:13

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General

  • Target
    BA062ECC79AEDCFA821065737035E20B.exe
  • Size 1.2MB
  • Sample210324-ely6xxf8qa
  • SHA256 ddd019669afb9f1adad82d960f9e6edc9329e80d91cf7e5b3f1da8698518ec00
  • MD5 SHA1 SHA512
Score
8/10
evasionpersistence

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs
    evasion
  • Drops startup file 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Drops autorun.inf file 1 TTPs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 16 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
    evasion
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 32 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\BA062ECC79AEDCFA821065737035E20B.exe
    "C:\Users\Admin\AppData\Local\Temp\BA062ECC79AEDCFA821065737035E20B.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1108
    • C:\Users\Admin\AppData\Local\Temp\chrome.exe
      "C:\Users\Admin\AppData\Local\Temp\chrome.exe"
      2⤵
      • Executes dropped EXE
      • Drops startup file
      • Adds Run key to start application
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:880
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\chrome.exe" "chrome.exe" ENABLE
        3⤵
          PID:332
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /F /IM Exsample.exe
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:792

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          memory/880-12-0x0000000002FE0000-0x0000000002FF1000-memory.dmp
          Download

          memory/880-11-0x0000000002D40000-0x0000000002D51000-memory.dmp
          Download

          memory/880-13-0x0000000002920000-0x0000000002921000-memory.dmp
          Download

          memory/1108-5-0x00000000034C0000-0x00000000034C1000-memory.dmp
          Download

          memory/1108-2-0x00000000760D1000-0x00000000760D3000-memory.dmp
          Download

          memory/1108-4-0x0000000003030000-0x0000000003041000-memory.dmp
          Download

          memory/1108-3-0x0000000002D50000-0x0000000002D61000-memory.dmp
          Download