Overview

overview

10

Static

static

d91572ef64...6d.exe

windows7_x64

10

d91572ef64...6d.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    164s
  • max time network
    215s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    20-02-2022 01:44

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General

  • Target

    d91572ef64c5c77b1085a5e6cc40cab2a78f714288c29d1d8bdbb613aa5c9c6d.exe

  • Size

    201KB

  • MD5

    8fb17e62abc491dc6f8e9630d73d935d

  • SHA1

    ed0b184eb9b1e2a8b9f95b79cfcd691d2a4f4084

  • SHA256

    d91572ef64c5c77b1085a5e6cc40cab2a78f714288c29d1d8bdbb613aa5c9c6d

  • SHA512

    ee075b4a368175c773f400424b97e57de84e37d5858e4c938edd6df9cb6e4917f7fdc0a83df3fdf253fe0401f50cc702d307cf33d05898414796fb36f077039e

Score
10/10
ryukpersistenceransomware

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\RyukReadMe.html

Family

ryuk

Ransom Note
<html><body><p style="font-weight:bold;font-size:125%;top:0;left:0;"> [email protected] <br> </p><p style="position:absolute;bottom:0;right:1%;font-weight:bold;font-size:170%">balance of shadow universe</p><div style="font-size: 550%;font-weight:bold;width:50%;height:50%;overflow:auto;margin:auto;position:absolute;top:35%;left:40%;">Ryuk</div></body></html�������������������������������������������������������������������������������������������������������������������������������������������������������

Extracted

Path

C:\Documents and Settings\Admin\AppData\Local\Adobe\Acrobat\DC\RyukReadMe.html

Family

ryuk

Ransom Note
[email protected] balance of shadow universe Ryuk

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Adds Run key to start application 2 TTPs 6 IoCs
    persistence
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Modifies registry class 52 IoCs
  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 20 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 61 IoCs

Processes

  • C:\Windows\system32\DllHost.exe
    C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2760
    • C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 2760 -s 928
      2⤵
      • Program crash
      PID:4880
  • C:\Windows\System32\RuntimeBroker.exe
    C:\Windows\System32\RuntimeBroker.exe -Embedding
    1⤵
      PID:2936
    • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
      "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2868
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p
      1⤵
        PID:2564
      • C:\Windows\System32\RuntimeBroker.exe
        C:\Windows\System32\RuntimeBroker.exe -Embedding
        1⤵
        • Modifies registry class
        PID:3544
      • C:\Windows\system32\MusNotifyIcon.exe
        %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
        1⤵
          PID:2448
        • C:\Windows\system32\backgroundTaskHost.exe
          "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1724
        • C:\Windows\System32\RuntimeBroker.exe
          C:\Windows\System32\RuntimeBroker.exe -Embedding
          1⤵
            PID:3428
          • C:\Windows\System32\RuntimeBroker.exe
            C:\Windows\System32\RuntimeBroker.exe -Embedding
            1⤵
              PID:2904
            • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
              "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
              1⤵
                PID:3024
              • C:\Windows\system32\taskhostw.exe
                taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
                1⤵
                  PID:2320
                • C:\Windows\system32\svchost.exe
                  C:\Windows\system32\svchost.exe -k UnistackSvcGroup
                  1⤵
                    PID:2284
                  • C:\Windows\system32\sihost.exe
                    sihost.exe
                    1⤵
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    • Suspicious use of WriteProcessMemory
                    PID:2256
                    • C:\Windows\System32\cmd.exe
                      "C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Windows\system32\sihost.exe" /f
                      2⤵
                      • Suspicious use of WriteProcessMemory
                      PID:3704
                      • C:\Windows\system32\reg.exe
                        REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Windows\system32\sihost.exe" /f
                        3⤵
                        • Adds Run key to start application
                        PID:492
                    • C:\Windows\System32\net.exe
                      "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
                      2⤵
                      • Suspicious use of WriteProcessMemory
                      PID:4904
                      • C:\Windows\system32\net1.exe
                        C:\Windows\system32\net1 stop "audioendpointbuilder" /y
                        3⤵
                          PID:97100
                      • C:\Windows\System32\net.exe
                        "C:\Windows\System32\net.exe" stop "samss" /y
                        2⤵
                        • Suspicious use of WriteProcessMemory
                        PID:4924
                        • C:\Windows\system32\net1.exe
                          C:\Windows\system32\net1 stop "samss" /y
                          3⤵
                            PID:97076
                      • C:\Users\Admin\AppData\Local\Temp\d91572ef64c5c77b1085a5e6cc40cab2a78f714288c29d1d8bdbb613aa5c9c6d.exe
                        "C:\Users\Admin\AppData\Local\Temp\d91572ef64c5c77b1085a5e6cc40cab2a78f714288c29d1d8bdbb613aa5c9c6d.exe"
                        1⤵
                        • Checks computer location settings
                        • Suspicious behavior: EnumeratesProcesses
                        • Suspicious use of AdjustPrivilegeToken
                        • Suspicious use of WriteProcessMemory
                        PID:3164
                        • C:\Users\Admin\AppData\Local\Temp\WyEFFCr.exe
                          "C:\Users\Admin\AppData\Local\Temp\WyEFFCr.exe" 8 LAN
                          2⤵
                          • Executes dropped EXE
                          • Checks computer location settings
                          • Suspicious behavior: EnumeratesProcesses
                          • Suspicious use of AdjustPrivilegeToken
                          • Suspicious use of WriteProcessMemory
                          PID:760
                          • C:\Windows\System32\net.exe
                            "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
                            3⤵
                            • Suspicious use of WriteProcessMemory
                            PID:4768
                            • C:\Windows\system32\net1.exe
                              C:\Windows\system32\net1 stop "audioendpointbuilder" /y
                              4⤵
                                PID:97084
                            • C:\Windows\System32\net.exe
                              "C:\Windows\System32\net.exe" stop "samss" /y
                              3⤵
                              • Suspicious use of WriteProcessMemory
                              PID:4856
                              • C:\Windows\system32\net1.exe
                                C:\Windows\system32\net1 stop "samss" /y
                                4⤵
                                  PID:97092
                              • C:\Windows\System32\cmd.exe
                                "C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\WyEFFCr.exe" /f
                                3⤵
                                • Suspicious use of WriteProcessMemory
                                PID:5184
                                • C:\Windows\system32\reg.exe
                                  REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\WyEFFCr.exe" /f
                                  4⤵
                                  • Adds Run key to start application
                                  PID:5236
                            • C:\Windows\System32\cmd.exe
                              "C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\d91572ef64c5c77b1085a5e6cc40cab2a78f714288c29d1d8bdbb613aa5c9c6d.exe" /f
                              2⤵
                              • Suspicious use of WriteProcessMemory
                              PID:2932
                              • C:\Windows\system32\reg.exe
                                REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\d91572ef64c5c77b1085a5e6cc40cab2a78f714288c29d1d8bdbb613aa5c9c6d.exe" /f
                                3⤵
                                • Adds Run key to start application
                                PID:4916
                            • C:\Windows\System32\net.exe
                              "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
                              2⤵
                              • Suspicious use of WriteProcessMemory
                              PID:4824
                              • C:\Windows\system32\net1.exe
                                C:\Windows\system32\net1 stop "audioendpointbuilder" /y
                                3⤵
                                  PID:75960
                              • C:\Windows\System32\net.exe
                                "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
                                2⤵
                                • Suspicious use of WriteProcessMemory
                                PID:4760
                                • C:\Windows\system32\net1.exe
                                  C:\Windows\system32\net1 stop "audioendpointbuilder" /y
                                  3⤵
                                    PID:75968
                                • C:\Windows\System32\net.exe
                                  "C:\Windows\System32\net.exe" stop "samss" /y
                                  2⤵
                                  • Suspicious use of WriteProcessMemory
                                  PID:3240
                                  • C:\Windows\system32\net1.exe
                                    C:\Windows\system32\net1 stop "samss" /y
                                    3⤵
                                      PID:78220
                                  • C:\Windows\System32\net.exe
                                    "C:\Windows\System32\net.exe" stop "samss" /y
                                    2⤵
                                    • Suspicious use of WriteProcessMemory
                                    PID:4908
                                    • C:\Windows\system32\net1.exe
                                      C:\Windows\system32\net1 stop "samss" /y
                                      3⤵
                                        PID:76032

                                  Network

                                  MITRE ATT&CK Enterprise v6

                                  Replay Monitor

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                                  Downloads

                                  • memory/2256-132-0x00007FF68AEB0000-0x00007FF68B025000-memory.dmp

                                    Filesize

                                    1.5MB

                                    Download

                                  • memory/2760-196-0x00000179E75E0000-0x00000179E75E8000-memory.dmp

                                    Filesize

                                    32KB

                                    Download

                                  • memory/2760-197-0x00000179E7590000-0x00000179E7591000-memory.dmp

                                    Filesize

                                    4KB

                                    Download

                                  • memory/2868-133-0x00007FF68AEB0000-0x00007FF68B025000-memory.dmp

                                    Filesize

                                    1.5MB

                                    Download