Overview

overview

10

Static

static

4992a62959...55.exe

windows7_x64

10

4992a62959...55.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    180s
  • max time network
    195s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    20-02-2022 07:42

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General

  • Target

    4992a629599d25933b55fee0b69198e80ecdcb3727a0b11b3d2891e6cd5da555.exe

  • Size

    123KB

  • MD5

    55f9f395702221ef4943ad778f3db103

  • SHA1

    27a7e4a5a7035f31977bbc736547d904bd6569cf

  • SHA256

    4992a629599d25933b55fee0b69198e80ecdcb3727a0b11b3d2891e6cd5da555

  • SHA512

    7e0cf5cf151f6cfd4eca5d6d190e7610c202ab6ea61973f49332c1206c09c2980ac99b395deeee6bc59ee443b8f2872b4e99510011372cdc2f5a648efbfb436d

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: 1CN2iQbBikFK9jM34Nb3WLx5DCenQLnbXp Ryuk
Wallets

1CN2iQbBikFK9jM34Nb3WLx5DCenQLnbXp

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • 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 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Windows\System32\RuntimeBroker.exe
    C:\Windows\System32\RuntimeBroker.exe -Embedding
    1⤵
      PID:3000
    • C:\Windows\System32\RuntimeBroker.exe
      C:\Windows\System32\RuntimeBroker.exe -Embedding
      1⤵
        PID:2008
      • C:\Windows\System32\RuntimeBroker.exe
        C:\Windows\System32\RuntimeBroker.exe -Embedding
        1⤵
          PID:3372
        • C:\Windows\System32\RuntimeBroker.exe
          C:\Windows\System32\RuntimeBroker.exe -Embedding
          1⤵
            PID:2624
          • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
            "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
            1⤵
              PID:1276
            • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
              "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
              1⤵
                PID:2864
              • C:\Windows\system32\DllHost.exe
                C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
                1⤵
                  PID:2760
                • C:\Windows\system32\svchost.exe
                  C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p
                  1⤵
                    PID:2544
                  • C:\Windows\system32\taskhostw.exe
                    taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
                    1⤵
                      PID:2296
                    • C:\Windows\system32\svchost.exe
                      C:\Windows\system32\svchost.exe -k UnistackSvcGroup
                      1⤵
                        PID:2240
                      • C:\Windows\system32\sihost.exe
                        sihost.exe
                        1⤵
                          PID:2224
                        • C:\Users\Admin\AppData\Local\Temp\4992a629599d25933b55fee0b69198e80ecdcb3727a0b11b3d2891e6cd5da555.exe
                          "C:\Users\Admin\AppData\Local\Temp\4992a629599d25933b55fee0b69198e80ecdcb3727a0b11b3d2891e6cd5da555.exe"
                          1⤵
                          • Checks computer location settings
                          • Drops file in Program Files directory
                          • Suspicious behavior: EnumeratesProcesses
                          • Suspicious use of AdjustPrivilegeToken
                          • Suspicious use of WriteProcessMemory
                          PID:3224
                          • C:\Windows\SysWOW64\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\4992a629599d25933b55fee0b69198e80ecdcb3727a0b11b3d2891e6cd5da555.exe" /f /reg:64
                            2⤵
                            • Suspicious use of WriteProcessMemory
                            PID:3268
                            • C:\Windows\SysWOW64\reg.exe
                              REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\4992a629599d25933b55fee0b69198e80ecdcb3727a0b11b3d2891e6cd5da555.exe" /f /reg:64
                              3⤵
                              • Adds Run key to start application
                              PID:3816
                        • C:\Windows\system32\MusNotifyIcon.exe
                          %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
                          1⤵
                          • Checks processor information in registry
                          PID:3316
                        • 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:832
                        • C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe
                          C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe -Embedding
                          1⤵
                          • Drops file in Windows directory
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2208

                        Network

                        MITRE ATT&CK Enterprise v6

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