Overview

overview

10

Static

static

10

a3977fd383...09.exe

windows7_x64

10

a3977fd383...09.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    103s
  • max time network
    207s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    07-06-2022 18:29

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General

  • Target

    a3977fd383059a9833f42178061c0038754a19a76891aed5f38f36cd0300f709.exe

  • Size

    87KB

  • MD5

    2ef91650e60c37e9f0b35c3d7e172848

  • SHA1

    76f18f62b8560e77141e0a1c21b0780187fdfdb9

  • SHA256

    a3977fd383059a9833f42178061c0038754a19a76891aed5f38f36cd0300f709

  • SHA512

    be8f454bedbacdc0ac0a07323f951426b917c087cbf533f80d761e03af18bcfe179c762014878a7f5a22c8925cae1498f1d18c792a943b5bce45c636c81cde3f

Score
10/10
evasionpersistenceransomware

Malware Config

Signatures

  • Contains code to disable Windows Defender 1 IoCs

    A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
    persistence
  • Modifies boot configuration data using bcdedit 1 TTPs 1 IoCs
    ransomwareevasion
  • Modifies registry key 1 TTPs 1 IoCs
  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a3977fd383059a9833f42178061c0038754a19a76891aed5f38f36cd0300f709.exe
    "C:\Users\Admin\AppData\Local\Temp\a3977fd383059a9833f42178061c0038754a19a76891aed5f38f36cd0300f709.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:964
    • C:\Windows\system32\reg.exe
      "reg.exe" delete HKLM\System\CurrentControlSet\Control\SafeBoot\Minimal\WinDefend /f
      2⤵
      • Modifies registry key
      PID:1716
    • C:\Windows\system32\bcdedit.exe
      "bcdedit.exe" /set {default} safeboot network
      2⤵
      • Modifies boot configuration data using bcdedit
      PID:1068
    • C:\Windows\system32\reg.exe
      "reg.exe" add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" /v Userinit /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\a3977fd383059a9833f42178061c0038754a19a76891aed5f38f36cd0300f709.exe","C:\Windows\system32\userinit.exe" /f
      2⤵
      • Modifies WinLogon for persistence
      PID:1692
    • C:\Windows\system32\shutdown.exe
      "shutdown.exe" /r /t 0
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1960
    • C:\Windows\system32\net.exe
      "net.exe" user Admin ""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1820
  • C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 user Admin ""
    1⤵
      PID:268
    • C:\Windows\system32\LogonUI.exe
      "LogonUI.exe" /flags:0x0
      1⤵
        PID:1104
      • C:\Windows\system32\AUDIODG.EXE
        C:\Windows\system32\AUDIODG.EXE 0x568
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1672
      • C:\Windows\system32\LogonUI.exe
        "LogonUI.exe" /flags:0x1
        1⤵
          PID:1632

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/268-60-0x0000000000000000-mapping.dmp

          Download

        • memory/964-54-0x0000000000300000-0x000000000031C000-memory.dmp

          Filesize

          112KB

          Download

        • memory/1068-56-0x0000000000000000-mapping.dmp

          Download

        • memory/1104-61-0x000007FEFC041000-0x000007FEFC043000-memory.dmp

          Filesize

          8KB

          Download

        • memory/1692-57-0x0000000000000000-mapping.dmp

          Download

        • memory/1716-55-0x0000000000000000-mapping.dmp

          Download

        • memory/1820-58-0x0000000000000000-mapping.dmp

          Download

        • memory/1960-59-0x0000000000000000-mapping.dmp

          Download