Overview

overview

10

Static

static

3533b142cd...49.exe

windows7_x64

10

3533b142cd...49.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    167s
  • max time network
    190s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    20/02/2022, 08:36

Sharing

Copy URL Twitter E-mail
Report Analysis Logs

General

  • Target
    3533b142cd5b092a59d02aa677c344106be5f549e83a1be077822e5a8dcd4349.exe
  • Size 119KB
  • Sample220220-khjtssbfdr
  • SHA256 3533b142cd5b092a59d02aa677c344106be5f549e83a1be077822e5a8dcd4349
  • 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 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. More than a year ago, world experts recognized the impossibility of deciphering by any means except the original decoder. No decryption software is available in the public. Antiviruse companies, researchers, IT specialists, and no other persons cant help you encrypt the data. DO NOT RESET OR SHUTDOWN - files may be damaged. DO NOT DELETE readme files. To confirm our honest intentions.Send 2 different random files and you will get it decrypted. It can be from different computers on your network to be sure that one key decrypts everything. 2 files we unlock for free To get info (decrypt your files) contact us at [email protected] or [email protected] BTC wallet: 12N7W9ycLhuck9Q2wT8E6BaN6XzZ4DMLau Ryuk No system is safe
Wallets

  • 12N7W9ycLhuck9Q2wT8E6BaN6XzZ4DMLau

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 6 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 7 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc
    1⤵
      PID:2372
    • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
      "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
      1⤵
        PID:3340
      • C:\Windows\System32\RuntimeBroker.exe
        C:\Windows\System32\RuntimeBroker.exe -Embedding
        1⤵
          PID:3412
        • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
          "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
          1⤵
            PID:3492
          • C:\Windows\System32\RuntimeBroker.exe
            C:\Windows\System32\RuntimeBroker.exe -Embedding
            1⤵
              PID:3692
            • C:\Windows\System32\RuntimeBroker.exe
              C:\Windows\System32\RuntimeBroker.exe -Embedding
              1⤵
                PID:3088
              • C:\Windows\System32\RuntimeBroker.exe
                C:\Windows\System32\RuntimeBroker.exe -Embedding
                1⤵
                  PID:2132
                • C:\Windows\system32\DllHost.exe
                  C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
                  1⤵
                    PID:3248
                  • C:\Windows\system32\svchost.exe
                    C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc
                    1⤵
                      PID:1148
                    • C:\Windows\system32\taskhostw.exe
                      taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
                      1⤵
                        PID:2468
                      • C:\Windows\system32\sihost.exe
                        sihost.exe
                        1⤵
                          PID:2344
                        • C:\Users\Admin\AppData\Local\Temp\3533b142cd5b092a59d02aa677c344106be5f549e83a1be077822e5a8dcd4349.exe
                          "C:\Users\Admin\AppData\Local\Temp\3533b142cd5b092a59d02aa677c344106be5f549e83a1be077822e5a8dcd4349.exe"
                          1⤵
                          • Checks computer location settings
                          • Drops file in Program Files directory
                          • Suspicious behavior: EnumeratesProcesses
                          • Suspicious use of AdjustPrivilegeToken
                          • Suspicious use of WriteProcessMemory
                          PID:3296
                          • 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\3533b142cd5b092a59d02aa677c344106be5f549e83a1be077822e5a8dcd4349.exe" /f /reg:64
                            2⤵
                            • Suspicious use of WriteProcessMemory
                            PID:1624
                            • 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\3533b142cd5b092a59d02aa677c344106be5f549e83a1be077822e5a8dcd4349.exe" /f /reg:64
                              3⤵
                              • Adds Run key to start application
                              PID:1788
                        • C:\Windows\system32\svchost.exe
                          C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
                          1⤵
                          • Drops file in Windows directory
                          • Suspicious use of AdjustPrivilegeToken
                          PID:3280
                        • C:\Windows\system32\backgroundTaskHost.exe
                          "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
                          1⤵
                            PID:860

                          Network

                                MITRE ATT&CK Enterprise v6

                                Replay Monitor

                                Loading Replay Monitor...

                                Downloads

                                memory/3280-133-0x00000205857A0000-0x00000205857B0000-memory.dmp
                                Download

                                memory/3280-134-0x0000020585D30000-0x0000020585D40000-memory.dmp
                                Download

                                memory/3280-135-0x0000020588420000-0x0000020588424000-memory.dmp
                                Download