Analysis

  • max time kernel
    150s
  • max time network
    146s
  • platform
    windows10-1703_x64
  • resource
    win10-20240221-en
  • resource tags

    arch:x64arch:x86image:win10-20240221-enlocale:en-usos:windows10-1703-x64system
  • submitted
    06-03-2024 13:24

General

  • Target

    23f8aa94ffb3c08a62735fe7fee5799880a8f322ce1d55ec49a13a3f85312db2.exe

  • Size

    384KB

  • MD5

    5ac0f050f93f86e69026faea1fbb4450

  • SHA1

    9709774fde9ec740ad6fed8ed79903296ca9d571

  • SHA256

    23f8aa94ffb3c08a62735fe7fee5799880a8f322ce1d55ec49a13a3f85312db2

  • SHA512

    b554487c4e26a85ec5179cdcc1d25b5bc494e8821a8899fbbf868c3cf41f70cc72db107613b3f6655d3ab70f4db94cce2589066bb354b1ed955098d3911b844d

  • SSDEEP

    6144:f5yaXtrA/WSo1rl3ALrlHQpn0BwK3SBDmhYfFQC:fTX6WSofcZ+KCIGD

Malware Config

Extracted

Path

F:\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.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • c:\windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Drops file in Program Files directory
    PID:2968
  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k unistacksvcgroup -s CDPUserSvc
    1⤵
      PID:3004
    • c:\windows\system32\taskhostw.exe
      taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
      1⤵
        PID:2112
      • C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe
        "C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe" -ServerName:CortanaUI.AppXa50dqqa5gqv4a428c9y1jjw7m3btvepj.mca
        1⤵
          PID:3572
        • C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe
          "C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe" -ServerName:App.AppXtk181tbxbce2qsex02s8tw7hfxa9xb3t.mca
          1⤵
            PID:3580
          • C:\Windows\System32\RuntimeBroker.exe
            C:\Windows\System32\RuntimeBroker.exe -Embedding
            1⤵
              PID:3864
            • C:\Windows\system32\DllHost.exe
              C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
              1⤵
                PID:4088
              • C:\Windows\system32\ApplicationFrameHost.exe
                C:\Windows\system32\ApplicationFrameHost.exe -Embedding
                1⤵
                  PID:3036
                • C:\Windows\System32\InstallAgent.exe
                  C:\Windows\System32\InstallAgent.exe -Embedding
                  1⤵
                    PID:5092
                  • C:\Windows\system32\DllHost.exe
                    C:\Windows\system32\DllHost.exe /Processid:{973D20D7-562D-44B9-B70B-5A0F49CCDF3F}
                    1⤵
                      PID:2700
                    • C:\Users\Admin\AppData\Local\Temp\23f8aa94ffb3c08a62735fe7fee5799880a8f322ce1d55ec49a13a3f85312db2.exe
                      "C:\Users\Admin\AppData\Local\Temp\23f8aa94ffb3c08a62735fe7fee5799880a8f322ce1d55ec49a13a3f85312db2.exe"
                      1⤵
                      • Suspicious use of WriteProcessMemory
                      PID:2192
                      • C:\users\Public\UvPSn.exe
                        "C:\users\Public\UvPSn.exe" C:\Users\Admin\AppData\Local\Temp\23f8aa94ffb3c08a62735fe7fee5799880a8f322ce1d55ec49a13a3f85312db2.exe
                        2⤵
                        • Deletes itself
                        • Executes dropped EXE
                        • Suspicious behavior: EnumeratesProcesses
                        • Suspicious use of AdjustPrivilegeToken
                        • Suspicious use of WriteProcessMemory
                        PID:1548
                        • 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\Public\UvPSn.exe" /f
                          3⤵
                          • Suspicious use of WriteProcessMemory
                          PID:4528
                          • C:\Windows\system32\reg.exe
                            REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\users\Public\UvPSn.exe" /f
                            4⤵
                            • Adds Run key to start application
                            PID:312

                    Network

                    MITRE ATT&CK Enterprise v15

                    Replay Monitor

                    Loading Replay Monitor...

                    Downloads

                    • C:\Users\Public\UvPSn.exe

                      Filesize

                      170KB

                      MD5

                      31bd0f224e7e74eee2847f43aae23974

                      SHA1

                      92e331e1e8ad30538f38dd7ba31386afafa14a58

                      SHA256

                      8b0a5fb13309623c3518473551cb1f55d38d8450129d4a3c16b476f7b2867d7d

                      SHA512

                      a13f05a12b084ef425f542ff4be824bbccb5dbdfe085af8b7e19d81a6bcba4b8c1debcc38f6b57bc9265a4db21eed70852ece8cc62b3ef14c47fca3035a55249

                    • F:\RyukReadMe.txt

                      Filesize

                      804B

                      MD5

                      cd99cba6153cbc0b14b7a849e4d0180f

                      SHA1

                      375961866404a705916cbc6cd4915de7d9778923

                      SHA256

                      74c43a177917b1d57ea2eaf6212ccf3b9012b4d68bc45284349443eed0bf5ee2

                      SHA512

                      0c9f250c0e2ec9736b072a9807b6c3bec4b670ab2f511e65cf5d79e9a8c9a209eb91736ce2765b52b6d94a57c6aa1c16bb08e16727660699b70608439c8b7cda

                    • memory/2968-78-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-1770-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-25-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-27-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-29-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-33-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-36-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-38-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-42-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-39-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-45-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-49-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-51-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-54-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-57-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-60-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-5-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-63-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-70-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-69-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-73-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-76-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-82-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-6-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-58-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-87-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-93-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-90-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-84-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-81-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-75-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-72-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-66-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-47-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-44-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-94-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-96-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-99-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-97-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-102-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-105-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-108-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-109-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-100-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/2968-85-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB

                    • memory/3004-2234-0x00007FF610C70000-0x00007FF610FFE000-memory.dmp

                      Filesize

                      3.6MB