Overview

overview

10

Static

static

b8857e26d8...20.exe

windows7_x64

10

b8857e26d8...20.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    171s
  • max time network
    171s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    20-02-2022 02:49

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General

  • Target

    b8857e26d83b061ade0ade27558c4c6a83e80a6a85142d7c016e01a597852720.exe

  • Size

    123KB

  • MD5

    2ea4d8210255c338743dbd770528251f

  • SHA1

    494eda967c0262e8e50ffc7903fc550fefad9e46

  • SHA256

    b8857e26d83b061ade0ade27558c4c6a83e80a6a85142d7c016e01a597852720

  • SHA512

    404ed8fdb7307e54ffd3f953ffb296173a742a45eb4a7884c65662a575386f59376d00735ea76d6cd6da3dd986abc38bf03791d6db96e2461e21f4d2b12e8899

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
  • 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.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Windows\system32\taskhostw.exe
    taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
    1⤵
      PID:2296
    • C:\Windows\System32\RuntimeBroker.exe
      C:\Windows\System32\RuntimeBroker.exe -Embedding
      1⤵
        PID:2984
      • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
        "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
        1⤵
          PID:3064
        • C:\Windows\System32\RuntimeBroker.exe
          C:\Windows\System32\RuntimeBroker.exe -Embedding
          1⤵
            PID:2572
          • C:\Windows\System32\RuntimeBroker.exe
            C:\Windows\System32\RuntimeBroker.exe -Embedding
            1⤵
              PID:3324
            • C:\Windows\System32\RuntimeBroker.exe
              C:\Windows\System32\RuntimeBroker.exe -Embedding
              1⤵
                PID:2628
              • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
                "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
                1⤵
                  PID:2904
                • C:\Windows\system32\DllHost.exe
                  C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
                  1⤵
                    PID:2744
                  • C:\Windows\system32\svchost.exe
                    C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p
                    1⤵
                      PID:2528
                    • C:\Windows\system32\svchost.exe
                      C:\Windows\system32\svchost.exe -k UnistackSvcGroup
                      1⤵
                        PID:2244
                      • C:\Windows\system32\sihost.exe
                        sihost.exe
                        1⤵
                          PID:2228
                        • C:\Users\Admin\AppData\Local\Temp\b8857e26d83b061ade0ade27558c4c6a83e80a6a85142d7c016e01a597852720.exe
                          "C:\Users\Admin\AppData\Local\Temp\b8857e26d83b061ade0ade27558c4c6a83e80a6a85142d7c016e01a597852720.exe"
                          1⤵
                          • Checks computer location settings
                          • Drops file in Program Files directory
                          • Suspicious behavior: EnumeratesProcesses
                          • Suspicious use of AdjustPrivilegeToken
                          • Suspicious use of WriteProcessMemory
                          PID:3748
                          • 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\b8857e26d83b061ade0ade27558c4c6a83e80a6a85142d7c016e01a597852720.exe" /f /reg:64
                            2⤵
                            • Suspicious use of WriteProcessMemory
                            PID:2616
                            • 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\b8857e26d83b061ade0ade27558c4c6a83e80a6a85142d7c016e01a597852720.exe" /f /reg:64
                              3⤵
                              • Adds Run key to start application
                              PID:1476
                        • C:\Windows\system32\MusNotifyIcon.exe
                          %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
                          1⤵
                          • Checks processor information in registry
                          PID:3264
                        • C:\Windows\System32\svchost.exe
                          C:\Windows\System32\svchost.exe -k NetworkService -p
                          1⤵
                            PID:4336

                          Network

                          MITRE ATT&CK Matrix ATT&CK v6

                          Initial Access

                          Execution

                          Persistence

                          Registry Run Keys / Startup Folder

                          1
                          T1060

                          Privilege Escalation

                          Defense Evasion

                          Modify Registry

                          1
                          T1112

                          Credential Access

                          Discovery

                          Query Registry

                          2
                          T1012

                          System Information Discovery

                          3
                          T1082

                          Lateral Movement

                          Collection

                          Exfiltration

                          Command and Control

                          Impact

                          Replay Monitor

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                          Downloads