Overview

overview

10

Static

static

c51024bb11...8e.exe

windows7_x64

10

c51024bb11...8e.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    185s
  • max time network
    181s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    20-02-2022 02:18

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General

  • Target

    c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe

  • Size

    155KB

  • MD5

    1354ac0d5be0c8d03f4e3aba78d2223e

  • SHA1

    a44a8c8c8f167d455db41316f3616ef5703bffff

  • SHA256

    c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e

  • SHA512

    b9b785f3b4640b2cd508e748032c8b85519464d8e36887993bb2e86d92ff72fe8f086a659b0b5e5ef0561db146573aa3beb7bb929fc85d3635531c3d981eaa60

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.

  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Modifies registry class 36 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Windows\system32\DllHost.exe
    C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2652
    • C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 2652 -s 996
      2⤵
      • Program crash
      PID:308
  • C:\Windows\System32\RuntimeBroker.exe
    C:\Windows\System32\RuntimeBroker.exe -Embedding
    1⤵
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    PID:3000
  • C:\Windows\System32\RuntimeBroker.exe
    C:\Windows\System32\RuntimeBroker.exe -Embedding
    1⤵
      PID:3616
    • C:\Windows\system32\backgroundTaskHost.exe
      "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
      1⤵
        PID:1588
      • C:\Windows\system32\backgroundTaskHost.exe
        "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:CortanaUI.AppX3bn25b6f886wmg6twh46972vprk9tnbf.mca
        1⤵
          PID:1604
        • C:\Windows\System32\RuntimeBroker.exe
          C:\Windows\System32\RuntimeBroker.exe -Embedding
          1⤵
          • Modifies registry class
          PID:3676
        • C:\Windows\System32\RuntimeBroker.exe
          C:\Windows\System32\RuntimeBroker.exe -Embedding
          1⤵
            PID:3208
          • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
            "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
            1⤵
              PID:2204
            • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
              "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
              1⤵
                PID:2828
              • C:\Windows\system32\svchost.exe
                C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p
                1⤵
                  PID:2456
                • C:\Windows\system32\taskhostw.exe
                  taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
                  1⤵
                    PID:2208
                  • C:\Windows\system32\svchost.exe
                    C:\Windows\system32\svchost.exe -k UnistackSvcGroup
                    1⤵
                      PID:2160
                    • C:\Windows\system32\sihost.exe
                      sihost.exe
                      1⤵
                      • Drops file in Program Files directory
                      PID:2140
                    • C:\Users\Admin\AppData\Local\Temp\c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe
                      "C:\Users\Admin\AppData\Local\Temp\c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe"
                      1⤵
                      • Checks computer location settings
                      • Suspicious behavior: EnumeratesProcesses
                      • Suspicious use of AdjustPrivilegeToken
                      • Suspicious use of WriteProcessMemory
                      PID:3608
                      • 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\c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe" /f
                        2⤵
                        • Suspicious use of WriteProcessMemory
                        PID:1072
                        • 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\c51024bb119211c335f95e731cfa9a744fcdb645a57d35fb379d01b7dbdd098e.exe" /f
                          3⤵
                          • Adds Run key to start application
                          PID:2820
                    • C:\Windows\system32\BackgroundTransferHost.exe
                      "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.1
                      1⤵
                        PID:1220
                      • C:\Windows\system32\MusNotifyIcon.exe
                        %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 0
                        1⤵
                        • Checks processor information in registry
                        PID:3656
                      • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
                        "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
                        1⤵
                        • Modifies registry class
                        • Suspicious use of SetWindowsHookEx
                        PID:320
                      • C:\Windows\system32\svchost.exe
                        C:\Windows\system32\svchost.exe -k wusvcs -p
                        1⤵
                          PID:2808

                        Network

                        MITRE ATT&CK Enterprise v6

                        Replay Monitor

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                        Downloads

                        • memory/2140-130-0x00007FF7ECD10000-0x00007FF7ED09A000-memory.dmp

                          Filesize

                          3.5MB

                          Download

                        • memory/2208-131-0x00007FF7ECD10000-0x00007FF7ED09A000-memory.dmp

                          Filesize

                          3.5MB

                          Download

                        • memory/2652-136-0x000001A8A9AD0000-0x000001A8A9AD8000-memory.dmp

                          Filesize

                          32KB

                          Download

                        • memory/2652-137-0x000001A8A9AC0000-0x000001A8A9AC1000-memory.dmp

                          Filesize

                          4KB

                          Download

                        • memory/2828-132-0x00007FF7ECD10000-0x00007FF7ED09A000-memory.dmp

                          Filesize

                          3.5MB

                          Download