Overview

overview

10

Static

static

f11c927bbd...8b.exe

windows7_x64

10

f11c927bbd...8b.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    185s
  • max time network
    202s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    20-02-2022 00:29

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General

  • Target

    f11c927bbdf1b8c4a2d84d68f25c9acd71fd7406acdc1ee99135904faad54d8b.exe

  • Size

    153KB

  • MD5

    a1dbf564e44044009b39571153566cbe

  • SHA1

    cb432252dc9a9d5c9822fcaf331bce97bcc15b17

  • SHA256

    f11c927bbdf1b8c4a2d84d68f25c9acd71fd7406acdc1ee99135904faad54d8b

  • SHA512

    7887c895b269fdd14ecdd86514d65deb2653a81be2aeea3a01ee2efc48c09c021c56a5d9d899d7a0949804623f4c7ec61b479964da6223ca32d3a9cd03991140

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 3 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 4 IoCs
  • Checks processor information in registry 2 TTPs 8 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 4 IoCs
  • Modifies data under HKEY_USERS 45 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Windows\system32\taskhostw.exe
    taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
    1⤵
      PID:2256
    • C:\Windows\System32\RuntimeBroker.exe
      C:\Windows\System32\RuntimeBroker.exe -Embedding
      1⤵
        PID:3288
      • C:\Windows\system32\BackgroundTransferHost.exe
        "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.1
        1⤵
          PID:1956
          • C:\Windows\system32\WerFault.exe
            C:\Windows\system32\WerFault.exe -u -p 1956 -s 2028
            2⤵
            • Program crash
            • Checks processor information in registry
            • Enumerates system info in registry
            • Suspicious behavior: EnumeratesProcesses
            PID:4260
        • C:\Windows\System32\RuntimeBroker.exe
          C:\Windows\System32\RuntimeBroker.exe -Embedding
          1⤵
            PID:3824
          • C:\Windows\System32\RuntimeBroker.exe
            C:\Windows\System32\RuntimeBroker.exe -Embedding
            1⤵
              PID:2556
            • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
              "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
              1⤵
                PID:2988
              • C:\Windows\System32\RuntimeBroker.exe
                C:\Windows\System32\RuntimeBroker.exe -Embedding
                1⤵
                • Suspicious use of AdjustPrivilegeToken
                PID:2892
              • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
                "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
                1⤵
                  PID:2816
                  • C:\Windows\system32\WerFault.exe
                    C:\Windows\system32\WerFault.exe -u -p 2816 -s 2428
                    2⤵
                    • Program crash
                    • Suspicious behavior: EnumeratesProcesses
                    PID:4252
                • C:\Windows\system32\DllHost.exe
                  C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
                  1⤵
                  • Suspicious use of WriteProcessMemory
                  PID:2708
                  • C:\Windows\system32\WerFault.exe
                    C:\Windows\system32\WerFault.exe -u -p 2708 -s 976
                    2⤵
                    • Program crash
                    • Checks processor information in registry
                    • Enumerates system info in registry
                    • Suspicious behavior: EnumeratesProcesses
                    PID:2996
                  • C:\Windows\system32\WerFault.exe
                    C:\Windows\system32\WerFault.exe -u -p 2708 -s 976
                    2⤵
                    • Program crash
                    PID:4244
                • C:\Windows\system32\svchost.exe
                  C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p
                  1⤵
                    PID:2520
                  • C:\Windows\system32\svchost.exe
                    C:\Windows\system32\svchost.exe -k UnistackSvcGroup
                    1⤵
                      PID:2212
                    • C:\Windows\system32\sihost.exe
                      sihost.exe
                      1⤵
                      • Drops file in Program Files directory
                      PID:2192
                    • C:\Users\Admin\AppData\Local\Temp\f11c927bbdf1b8c4a2d84d68f25c9acd71fd7406acdc1ee99135904faad54d8b.exe
                      "C:\Users\Admin\AppData\Local\Temp\f11c927bbdf1b8c4a2d84d68f25c9acd71fd7406acdc1ee99135904faad54d8b.exe"
                      1⤵
                      • Checks computer location settings
                      • Suspicious behavior: EnumeratesProcesses
                      • Suspicious use of AdjustPrivilegeToken
                      • Suspicious use of WriteProcessMemory
                      PID:3068
                      • 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\f11c927bbdf1b8c4a2d84d68f25c9acd71fd7406acdc1ee99135904faad54d8b.exe" /f
                        2⤵
                        • Suspicious use of WriteProcessMemory
                        PID:4004
                        • 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\f11c927bbdf1b8c4a2d84d68f25c9acd71fd7406acdc1ee99135904faad54d8b.exe" /f
                          3⤵
                          • Adds Run key to start application
                          PID:2900
                    • C:\Windows\system32\MusNotifyIcon.exe
                      %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
                      1⤵
                      • Checks processor information in registry
                      PID:3168
                    • C:\Windows\system32\WerFault.exe
                      C:\Windows\system32\WerFault.exe -pss -s 420 -p 2708 -ip 2708
                      1⤵
                      • Suspicious use of NtCreateProcessExOtherParentProcess
                      • Suspicious use of WriteProcessMemory
                      PID:3308
                    • C:\Windows\system32\WerFault.exe
                      C:\Windows\system32\WerFault.exe -pss -s 464 -p 2816 -ip 2816
                      1⤵
                      • Suspicious use of NtCreateProcessExOtherParentProcess
                      • Suspicious use of WriteProcessMemory
                      PID:3736
                    • C:\Windows\system32\WerFault.exe
                      C:\Windows\system32\WerFault.exe -pss -s 492 -p 1956 -ip 1956
                      1⤵
                      • Suspicious use of NtCreateProcessExOtherParentProcess
                      • Suspicious use of WriteProcessMemory
                      PID:4160
                    • C:\Windows\System32\svchost.exe
                      C:\Windows\System32\svchost.exe -k NetworkService -p
                      1⤵
                      • Drops file in Windows directory
                      • Modifies data under HKEY_USERS
                      PID:4692

                    Network

                    MITRE ATT&CK Enterprise v6

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                    Downloads

                    • memory/2192-130-0x00007FF6D5650000-0x00007FF6D59D9000-memory.dmp

                      Filesize

                      3.5MB

                      Download

                    • memory/2212-131-0x00007FF6D5650000-0x00007FF6D59D9000-memory.dmp

                      Filesize

                      3.5MB

                      Download

                    • memory/2708-132-0x0000023FAD4D0000-0x0000023FAD4D8000-memory.dmp

                      Filesize

                      32KB

                      Download

                    • memory/2708-133-0x0000023FAD4C0000-0x0000023FAD4C1000-memory.dmp

                      Filesize

                      4KB

                      Download