Overview

overview

10

Static

static

10

tanos.exe

windows7_x64

10

tanos.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    12s
  • max time network
    12s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    17-05-2022 10:35

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General

  • Target

    tanos.exe

  • Size

    87KB

  • MD5

    d6d956267a268c9dcf48445629d2803e

  • SHA1

    cc0feae505dad9c140dd21d1b40b518d8e61b3a4

  • SHA256

    c460fc0d4fdaf5c68623e18de106f1c3601d7bd6ba80ddad86c10fd6ea123850

  • SHA512

    e0791f6eb3116d0590be3af3713c94f787f7ced8e904d4bb8fc0d1341f332053414cb1e9095ae2de041b9e6d6d55cf773bf45ebeb74f27bb95c11a3cc364abee

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\tanos.exe
    "C:\Users\Admin\AppData\Local\Temp\tanos.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1036
    • C:\Windows\system32\reg.exe
      "reg.exe" delete HKLM\System\CurrentControlSet\Control\SafeBoot\Minimal\WinDefend /f
      2⤵
      • Modifies registry key
      PID:2008
    • C:\Windows\system32\bcdedit.exe
      "bcdedit.exe" /set {default} safeboot network
      2⤵
      • Modifies boot configuration data using bcdedit
      PID:952
    • 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\tanos.exe","C:\Windows\system32\userinit.exe" /f
      2⤵
      • Modifies WinLogon for persistence
      PID:1240
    • C:\Windows\system32\net.exe
      "net.exe" user Admin ""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1076
      • C:\Windows\system32\net1.exe
        C:\Windows\system32\net1 user Admin ""
        3⤵
          PID:1868
      • C:\Windows\system32\shutdown.exe
        "shutdown.exe" /r /t 0
        2⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1716
    • C:\Windows\system32\LogonUI.exe
      "LogonUI.exe" /flags:0x0
      1⤵
        PID:1484
      • C:\Windows\system32\AUDIODG.EXE
        C:\Windows\system32\AUDIODG.EXE 0x4d8
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1544
      • C:\Windows\system32\LogonUI.exe
        "LogonUI.exe" /flags:0x1
        1⤵
          PID:1408

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/952-56-0x0000000000000000-mapping.dmp

          Download

        • memory/1036-54-0x0000000001130000-0x000000000114C000-memory.dmp

          Filesize

          112KB

          Download

        • memory/1076-58-0x0000000000000000-mapping.dmp

          Download

        • memory/1240-57-0x0000000000000000-mapping.dmp

          Download

        • memory/1484-61-0x000007FEFBAA1000-0x000007FEFBAA3000-memory.dmp

          Filesize

          8KB

          Download

        • memory/1716-59-0x0000000000000000-mapping.dmp

          Download

        • memory/1868-60-0x0000000000000000-mapping.dmp

          Download

        • memory/2008-55-0x0000000000000000-mapping.dmp

          Download