Overview

overview

10

Static

static

17ad1d64ba...aa.exe

windows7_x64

10

17ad1d64ba...aa.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    180s
  • max time network
    186s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    20-02-2022 09:52

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General

  • Target

    17ad1d64baf39c16612ac1c056fc9c23b73d180451bcd8c170fce0861129afaa.exe

  • Size

    170KB

  • MD5

    83ca718ae747c80564e1a888051301a5

  • SHA1

    487f7828ea059d5730aafbfa54b8f86b2e6f321c

  • SHA256

    17ad1d64baf39c16612ac1c056fc9c23b73d180451bcd8c170fce0861129afaa

  • SHA512

    ad3b69ff2407cba0ae28d5537f98a0fdd2143705f0ab8fd9b9be342721dfb846252653cc0dd56038b6a32bc2979c43dd83ad87644e616c61bfed3b58c3f24a1f

Score
10/10
ryukpersistenceransomware

Malware Config

Extracted

Path

C:\RyukReadMe.txt

Family

ryuk

Ransom Note
Your network has been penetrated. All files on each host in the network have been encrypted with a strong algorithm. Backups were either encrypted or deleted or backup disks were formatted. Shadow copies also removed, so F8 or any other methods may damage encrypted data but not recover. We exclusively have decryption software for your situation No decryption software is available in the public. DO NOT RESET OR SHUTDOWN - files may be damaged. DO NOT RENAME OR MOVE the encrypted and readme files. DO NOT DELETE readme files. This may lead to the impossibility of recovery of the certain files. To get info (decrypt your files) contact us at [email protected] or [email protected] BTC wallet: 14hVKm7Ft2rxDBFTNkkRC3kGstMGp2A4hk Ryuk No system is safe
Wallets

14hVKm7Ft2rxDBFTNkkRC3kGstMGp2A4hk

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • Suspicious use of NtCreateProcessExOtherParentProcess 4 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 5 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 49 IoCs
  • Modifies registry class 30 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Windows\system32\taskhostw.exe
    taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
    1⤵
      PID:2296
    • C:\Windows\System32\RuntimeBroker.exe
      C:\Windows\System32\RuntimeBroker.exe -Embedding
      1⤵
        PID:2908
      • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
        "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
        1⤵
          PID:2992
        • C:\Windows\system32\backgroundTaskHost.exe
          "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
          1⤵
            PID:2224
            • C:\Windows\system32\WerFault.exe
              C:\Windows\system32\WerFault.exe -u -p 2224 -s 1696
              2⤵
              • Program crash
              PID:4664
          • C:\Windows\system32\backgroundTaskHost.exe
            "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:CortanaUI.AppX3bn25b6f886wmg6twh46972vprk9tnbf.mca
            1⤵
              PID:212
            • C:\Windows\system32\BackgroundTransferHost.exe
              "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.1
              1⤵
                PID:868
                • C:\Windows\system32\WerFault.exe
                  C:\Windows\system32\WerFault.exe -u -p 868 -s 2588
                  2⤵
                  • Program crash
                  PID:4672
              • C:\Windows\System32\RuntimeBroker.exe
                C:\Windows\System32\RuntimeBroker.exe -Embedding
                1⤵
                • Modifies registry class
                PID:2900
              • C:\Windows\System32\RuntimeBroker.exe
                C:\Windows\System32\RuntimeBroker.exe -Embedding
                1⤵
                  PID:3516
                • C:\Windows\System32\RuntimeBroker.exe
                  C:\Windows\System32\RuntimeBroker.exe -Embedding
                  1⤵
                    PID:3116
                  • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
                    "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
                    1⤵
                      PID:2844
                      • C:\Windows\system32\WerFault.exe
                        C:\Windows\system32\WerFault.exe -u -p 2844 -s 3060
                        2⤵
                        • Program crash
                        • Suspicious behavior: EnumeratesProcesses
                        PID:4656
                    • C:\Windows\system32\DllHost.exe
                      C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
                      1⤵
                      • Suspicious use of WriteProcessMemory
                      PID:2732
                      • C:\Windows\system32\WerFault.exe
                        C:\Windows\system32\WerFault.exe -u -p 2732 -s 980
                        2⤵
                        • Program crash
                        • Suspicious behavior: EnumeratesProcesses
                        PID:1104
                      • C:\Windows\system32\WerFault.exe
                        C:\Windows\system32\WerFault.exe -u -p 2732 -s 980
                        2⤵
                        • Program crash
                        PID:4648
                    • C:\Windows\system32\svchost.exe
                      C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p
                      1⤵
                        PID:2536
                      • C:\Windows\system32\svchost.exe
                        C:\Windows\system32\svchost.exe -k UnistackSvcGroup
                        1⤵
                          PID:2252
                        • C:\Windows\system32\sihost.exe
                          sihost.exe
                          1⤵
                          • Drops file in Program Files directory
                          PID:2240
                        • C:\Users\Admin\AppData\Local\Temp\17ad1d64baf39c16612ac1c056fc9c23b73d180451bcd8c170fce0861129afaa.exe
                          "C:\Users\Admin\AppData\Local\Temp\17ad1d64baf39c16612ac1c056fc9c23b73d180451bcd8c170fce0861129afaa.exe"
                          1⤵
                          • Checks computer location settings
                          • Suspicious behavior: EnumeratesProcesses
                          • Suspicious use of AdjustPrivilegeToken
                          • Suspicious use of WriteProcessMemory
                          PID:4092
                          • 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\17ad1d64baf39c16612ac1c056fc9c23b73d180451bcd8c170fce0861129afaa.exe" /f
                            2⤵
                            • Suspicious use of WriteProcessMemory
                            PID:1876
                            • 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\17ad1d64baf39c16612ac1c056fc9c23b73d180451bcd8c170fce0861129afaa.exe" /f
                              3⤵
                              • Adds Run key to start application
                              PID:2236
                        • C:\Windows\system32\MusNotifyIcon.exe
                          %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
                          1⤵
                          • Checks processor information in registry
                          PID:3012
                        • C:\Windows\system32\WerFault.exe
                          C:\Windows\system32\WerFault.exe -pss -s 472 -p 2844 -ip 2844
                          1⤵
                          • Suspicious use of NtCreateProcessExOtherParentProcess
                          • Suspicious use of WriteProcessMemory
                          PID:2984
                        • C:\Windows\system32\WerFault.exe
                          C:\Windows\system32\WerFault.exe -pss -s 492 -p 2224 -ip 2224
                          1⤵
                          • Suspicious use of NtCreateProcessExOtherParentProcess
                          • Suspicious use of WriteProcessMemory
                          PID:3020
                        • C:\Windows\system32\WerFault.exe
                          C:\Windows\system32\WerFault.exe -pss -s 504 -p 2732 -ip 2732
                          1⤵
                          • Suspicious use of NtCreateProcessExOtherParentProcess
                          • Suspicious use of WriteProcessMemory
                          PID:1300
                        • C:\Windows\system32\WerFault.exe
                          C:\Windows\system32\WerFault.exe -pss -s 576 -p 868 -ip 868
                          1⤵
                          • Suspicious use of NtCreateProcessExOtherParentProcess
                          • Suspicious use of WriteProcessMemory
                          PID:1152
                        • C:\Windows\System32\svchost.exe
                          C:\Windows\System32\svchost.exe -k NetworkService -p
                          1⤵
                          • Drops file in Windows directory
                          • Modifies data under HKEY_USERS
                          PID:4440

                        Network

                        MITRE ATT&CK Enterprise v6

                        Replay Monitor

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                        Downloads

                        • memory/2240-130-0x00007FF691980000-0x00007FF691D0E000-memory.dmp

                          Filesize

                          3.6MB

                          Download

                        • memory/2252-131-0x00007FF691980000-0x00007FF691D0E000-memory.dmp

                          Filesize

                          3.6MB

                          Download

                        • memory/2844-132-0x00007FF691980000-0x00007FF691D0E000-memory.dmp

                          Filesize

                          3.6MB

                          Download

                        • memory/3116-133-0x00007FF691980000-0x00007FF691D0E000-memory.dmp

                          Filesize

                          3.6MB

                          Download