Overview

overview

10

Static

static

46f4bff5e7...38.exe

windows7_x64

10

46f4bff5e7...38.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    205s
  • max time network
    223s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    20-02-2022 07:48

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General

  • Target

    46f4bff5e7232f725ea596b736d95e59f4ff45dc49c93ba275a4360216d76238.exe

  • Size

    170KB

  • MD5

    10bec3496015cbe868396b2b492b7c7d

  • SHA1

    51ca1c61c5cb3be6a27ab8ea921e41bf2598f023

  • SHA256

    46f4bff5e7232f725ea596b736d95e59f4ff45dc49c93ba275a4360216d76238

  • SHA512

    907d9759db4be17929f6418438791fff079f0ddb6bb8aff175389f41742c95229afd1dcd72a72193f0cdd5e225555781189244ecb9a3991d62f82db1fcd790b1

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 1 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 2 IoCs
  • Modifies data under HKEY_USERS 50 IoCs
  • Modifies registry class 40 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k UnistackSvcGroup
    1⤵
      PID:2112
    • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
      "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
      1⤵
        PID:2728
      • C:\Windows\system32\BackgroundTransferHost.exe
        "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.1
        1⤵
          PID:3544
        • C:\Windows\System32\RuntimeBroker.exe
          C:\Windows\System32\RuntimeBroker.exe -Embedding
          1⤵
          • Modifies registry class
          PID:2880
        • C:\Windows\System32\RuntimeBroker.exe
          C:\Windows\System32\RuntimeBroker.exe -Embedding
          1⤵
            PID:3460
          • C:\Windows\System32\RuntimeBroker.exe
            C:\Windows\System32\RuntimeBroker.exe -Embedding
            1⤵
              PID:3108
            • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
              "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
              1⤵
                PID:3032
              • C:\Windows\System32\RuntimeBroker.exe
                C:\Windows\System32\RuntimeBroker.exe -Embedding
                1⤵
                • Modifies registry class
                • Suspicious use of AdjustPrivilegeToken
                PID:2888
              • C:\Windows\system32\DllHost.exe
                C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
                1⤵
                • Suspicious use of WriteProcessMemory
                PID:2620
                • C:\Windows\system32\WerFault.exe
                  C:\Windows\system32\WerFault.exe -u -p 2620 -s 1016
                  2⤵
                  • Program crash
                  • Suspicious behavior: EnumeratesProcesses
                  PID:3176
                • C:\Windows\system32\WerFault.exe
                  C:\Windows\system32\WerFault.exe -u -p 2620 -s 1016
                  2⤵
                  • Program crash
                  PID:4844
              • C:\Windows\system32\svchost.exe
                C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p
                1⤵
                  PID:2416
                • C:\Windows\system32\taskhostw.exe
                  taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
                  1⤵
                    PID:2156
                  • C:\Windows\system32\sihost.exe
                    sihost.exe
                    1⤵
                    • Drops file in Program Files directory
                    PID:2096
                  • C:\Users\Admin\AppData\Local\Temp\46f4bff5e7232f725ea596b736d95e59f4ff45dc49c93ba275a4360216d76238.exe
                    "C:\Users\Admin\AppData\Local\Temp\46f4bff5e7232f725ea596b736d95e59f4ff45dc49c93ba275a4360216d76238.exe"
                    1⤵
                    • Checks computer location settings
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    • Suspicious use of WriteProcessMemory
                    PID:1564
                    • 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\46f4bff5e7232f725ea596b736d95e59f4ff45dc49c93ba275a4360216d76238.exe" /f
                      2⤵
                      • Suspicious use of WriteProcessMemory
                      PID:3676
                      • 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\46f4bff5e7232f725ea596b736d95e59f4ff45dc49c93ba275a4360216d76238.exe" /f
                        3⤵
                        • Adds Run key to start application
                        PID:3752
                  • C:\Windows\system32\backgroundTaskHost.exe
                    "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
                    1⤵
                      PID:2324
                    • C:\Windows\system32\WerFault.exe
                      C:\Windows\system32\WerFault.exe -pss -s 452 -p 2620 -ip 2620
                      1⤵
                      • Suspicious use of NtCreateProcessExOtherParentProcess
                      • Suspicious use of WriteProcessMemory
                      PID:2080
                    • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
                      "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
                      1⤵
                      • Modifies registry class
                      • Suspicious use of SetWindowsHookEx
                      PID:1816
                    • 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:2472

                    Network

                    MITRE ATT&CK Enterprise v6

                    Replay Monitor

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                    Downloads

                    • memory/2096-130-0x00007FF74D460000-0x00007FF74D7EE000-memory.dmp

                      Filesize

                      3.6MB

                      Download

                    • memory/2620-131-0x0000025991580000-0x0000025991588000-memory.dmp

                      Filesize

                      32KB

                      Download

                    • memory/2620-133-0x00000259914A0000-0x00000259914A1000-memory.dmp

                      Filesize

                      4KB

                      Download

                    • memory/2888-132-0x00007FF74D460000-0x00007FF74D7EE000-memory.dmp

                      Filesize

                      3.6MB

                      Download