Overview

overview

10

Static

static

bb43f54a93...70.exe

windows7_x64

10

bb43f54a93...70.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    210s
  • max time network
    203s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    20-02-2022 02:41

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General

  • Target

    bb43f54a93284e12598c1650b23cb44e0a254c6ab0593cc1d87fae2f19768470.exe

  • Size

    153KB

  • MD5

    bc812e73df40f9c193d3039041c4dd32

  • SHA1

    5329a5292bf28d89eb0c7f1cbd7960d60239e951

  • SHA256

    bb43f54a93284e12598c1650b23cb44e0a254c6ab0593cc1d87fae2f19768470

  • SHA512

    945f66e50155086560d33615250db8dd517fe2fbf517720e4c43ffedf83f3cf8b7f8372fe39c51b33f8463590120b4a62b394d7462dafd01362b88aa90a44b89

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 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: 15LsUgfnuGc1PsHJPcfLQJEnHm2FnGAgYC Ryuk No system is safe
Wallets

15LsUgfnuGc1PsHJPcfLQJEnHm2FnGAgYC

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • Suspicious use of NtCreateProcessExOtherParentProcess 2 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 3 IoCs
  • Modifies data under HKEY_USERS 46 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 22 IoCs

Processes

  • C:\Windows\system32\taskhostw.exe
    taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
    1⤵
      PID:2384
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k UnistackSvcGroup
      1⤵
        PID:2352
      • C:\Windows\system32\DllHost.exe
        C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
        1⤵
        • Suspicious use of WriteProcessMemory
        PID:2832
        • C:\Windows\system32\WerFault.exe
          C:\Windows\system32\WerFault.exe -u -p 2832 -s 1020
          2⤵
          • Drops file in Windows directory
          • Program crash
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2900
        • C:\Windows\system32\WerFault.exe
          C:\Windows\system32\WerFault.exe -u -p 2832 -s 1020
          2⤵
          • Program crash
          PID:4492
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p
        1⤵
          PID:2632
        • C:\Windows\system32\sihost.exe
          sihost.exe
          1⤵
          • Drops file in Program Files directory
          PID:2308
        • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
          "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
          1⤵
            PID:3016
            • C:\Windows\system32\WerFault.exe
              C:\Windows\system32\WerFault.exe -u -p 3016 -s 2856
              2⤵
              • Program crash
              • Suspicious behavior: EnumeratesProcesses
              PID:4496
          • C:\Windows\System32\RuntimeBroker.exe
            C:\Windows\System32\RuntimeBroker.exe -Embedding
            1⤵
              PID:1212
            • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
              "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
              1⤵
                PID:2216
              • C:\Windows\System32\RuntimeBroker.exe
                C:\Windows\System32\RuntimeBroker.exe -Embedding
                1⤵
                  PID:3132
                • C:\Windows\System32\RuntimeBroker.exe
                  C:\Windows\System32\RuntimeBroker.exe -Embedding
                  1⤵
                    PID:3548
                  • C:\Windows\system32\backgroundTaskHost.exe
                    "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
                    1⤵
                      PID:2452
                    • C:\Windows\System32\RuntimeBroker.exe
                      C:\Windows\System32\RuntimeBroker.exe -Embedding
                      1⤵
                      • Modifies registry class
                      PID:3364
                    • C:\Users\Admin\AppData\Local\Temp\bb43f54a93284e12598c1650b23cb44e0a254c6ab0593cc1d87fae2f19768470.exe
                      "C:\Users\Admin\AppData\Local\Temp\bb43f54a93284e12598c1650b23cb44e0a254c6ab0593cc1d87fae2f19768470.exe"
                      1⤵
                      • Checks computer location settings
                      • Suspicious behavior: EnumeratesProcesses
                      • Suspicious use of AdjustPrivilegeToken
                      • Suspicious use of WriteProcessMemory
                      PID:2760
                      • 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\bb43f54a93284e12598c1650b23cb44e0a254c6ab0593cc1d87fae2f19768470.exe" /f
                        2⤵
                        • Suspicious use of WriteProcessMemory
                        PID:1124
                        • 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\bb43f54a93284e12598c1650b23cb44e0a254c6ab0593cc1d87fae2f19768470.exe" /f
                          3⤵
                          • Adds Run key to start application
                          PID:1636
                    • C:\Windows\system32\WerFault.exe
                      C:\Windows\system32\WerFault.exe -pss -s 432 -p 3016 -ip 3016
                      1⤵
                      • Suspicious use of NtCreateProcessExOtherParentProcess
                      • Suspicious use of WriteProcessMemory
                      PID:3432
                    • C:\Windows\system32\WerFault.exe
                      C:\Windows\system32\WerFault.exe -pss -s 460 -p 2832 -ip 2832
                      1⤵
                      • Suspicious use of NtCreateProcessExOtherParentProcess
                      • Suspicious use of WriteProcessMemory
                      PID:2912
                    • C:\Windows\System32\svchost.exe
                      C:\Windows\System32\svchost.exe -k NetworkService -p
                      1⤵
                      • Modifies data under HKEY_USERS
                      PID:4232

                    Network

                    MITRE ATT&CK Enterprise v6

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                    Downloads

                    • memory/2308-130-0x00007FF7D7730000-0x00007FF7D7AB9000-memory.dmp
                      Filesize

                      3.5MB

                      Download
                    • memory/2632-131-0x00007FF7D7730000-0x00007FF7D7AB9000-memory.dmp
                      Filesize

                      3.5MB

                      Download
                    • memory/2832-132-0x0000018EFC470000-0x0000018EFC478000-memory.dmp
                      Filesize

                      32KB

                      Download
                    • memory/2832-133-0x0000018EFC420000-0x0000018EFC421000-memory.dmp
                      Filesize

                      4KB

                      Download