Overview

overview

10

Static

static

3ed0839999...cc.exe

windows7_x64

10

3ed0839999...cc.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    186s
  • max time network
    243s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    20/02/2022, 08:10

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General

  • Target
    3ed083999930a1eab5857dc0e0101fd5777a737029eabe6eb481052f78c53ccc.exe
  • Size 140KB
  • Sample220220-j2ztpabdhk
  • SHA256 3ed083999930a1eab5857dc0e0101fd5777a737029eabe6eb481052f78c53ccc
  • MD5 SHA1 SHA512
Score
10/10
ryukpersistenceransomware

Malware Config

Extracted

Path

  • C:\RyukReadMe.txt

  • 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
  • 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 45 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 19 IoCs

Processes

  • C:\Windows\System32\RuntimeBroker.exe
    C:\Windows\System32\RuntimeBroker.exe -Embedding
    1⤵
      PID:3424
    • C:\Windows\System32\RuntimeBroker.exe
      C:\Windows\System32\RuntimeBroker.exe -Embedding
      1⤵
        PID:2044
      • C:\Windows\system32\backgroundTaskHost.exe
        "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
        1⤵
          PID:556
        • C:\Windows\System32\RuntimeBroker.exe
          C:\Windows\System32\RuntimeBroker.exe -Embedding
          1⤵
            PID:2248
          • C:\Windows\System32\RuntimeBroker.exe
            C:\Windows\System32\RuntimeBroker.exe -Embedding
            1⤵
              PID:3744
            • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
              "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
              1⤵
                PID:3500
              • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
                "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
                1⤵
                  PID:3348
                • C:\Windows\system32\DllHost.exe
                  C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
                  1⤵
                    PID:3260
                  • C:\Windows\system32\svchost.exe
                    C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc
                    1⤵
                      PID:708
                    • C:\Windows\system32\taskhostw.exe
                      taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
                      1⤵
                        PID:2420
                      • C:\Windows\system32\svchost.exe
                        C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc
                        1⤵
                          PID:2300
                        • C:\Windows\system32\sihost.exe
                          sihost.exe
                          1⤵
                            PID:2276
                          • C:\Users\Admin\AppData\Local\Temp\3ed083999930a1eab5857dc0e0101fd5777a737029eabe6eb481052f78c53ccc.exe
                            "C:\Users\Admin\AppData\Local\Temp\3ed083999930a1eab5857dc0e0101fd5777a737029eabe6eb481052f78c53ccc.exe"
                            1⤵
                            • Checks computer location settings
                            • Drops file in Program Files directory
                            • Suspicious behavior: EnumeratesProcesses
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of WriteProcessMemory
                            PID:1176
                            • 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\3ed083999930a1eab5857dc0e0101fd5777a737029eabe6eb481052f78c53ccc.exe" /f /reg:64
                              2⤵
                              • Suspicious use of WriteProcessMemory
                              PID:2508
                              • 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\3ed083999930a1eab5857dc0e0101fd5777a737029eabe6eb481052f78c53ccc.exe" /f /reg:64
                                3⤵
                                • Adds Run key to start application
                                PID:448
                          • C:\Windows\system32\BackgroundTransferHost.exe
                            "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.1
                            1⤵
                              PID:640

                            Network

                                  MITRE ATT&CK Enterprise v6

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                                  Downloads

                                  memory/1176-130-0x0000000030000000-0x0000000030382000-memory.dmp
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