Overview

overview

10

Static

static

23e7c1b52d...c8.exe

windows7_x64

10

23e7c1b52d...c8.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    189s
  • max time network
    177s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    20-02-2022 09:18

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General

  • Target

    23e7c1b52d6ea8adec233eaff38c6a00153de3b99f51b02fe6a297ee5210f9c8.exe

  • Size

    170KB

  • MD5

    c4a5c4a20aa92002fd73ffa1eae12875

  • SHA1

    de32df32c920015197ed7304d67ac3475876502b

  • SHA256

    23e7c1b52d6ea8adec233eaff38c6a00153de3b99f51b02fe6a297ee5210f9c8

  • SHA512

    0c8b7702f0f8cfb715f4c7d2c254d3224c7f4f2aacc6cef30f774be8d3210b2defacbabf812d936d590ec720ab7c19c69ae8844f5a55993d0e31d3041fdf9e0b

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: 14hVKm7Ft2rxDBFTNkkRC3kGstMGp2A4hk Ryuk No system is safe
Wallets

14hVKm7Ft2rxDBFTNkkRC3kGstMGp2A4hk

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
  • 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 3 IoCs

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

  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Modifies registry class 49 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Drops file in Program Files directory
    PID:2236
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k UnistackSvcGroup
    1⤵
      PID:2252
    • C:\Windows\System32\RuntimeBroker.exe
      C:\Windows\System32\RuntimeBroker.exe -Embedding
      1⤵
        PID:2984
      • C:\Windows\System32\RuntimeBroker.exe
        C:\Windows\System32\RuntimeBroker.exe -Embedding
        1⤵
        • Modifies registry class
        PID:1836
      • C:\Windows\system32\backgroundTaskHost.exe
        "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
        1⤵
          PID:2100
        • C:\Windows\system32\backgroundTaskHost.exe
          "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:CortanaUI.AppX3bn25b6f886wmg6twh46972vprk9tnbf.mca
          1⤵
            PID:384
          • C:\Windows\System32\RuntimeBroker.exe
            C:\Windows\System32\RuntimeBroker.exe -Embedding
            1⤵
              PID:3544
            • C:\Windows\System32\RuntimeBroker.exe
              C:\Windows\System32\RuntimeBroker.exe -Embedding
              1⤵
                PID:3144
              • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
                "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
                1⤵
                  PID:3068
                • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
                  "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
                  1⤵
                    PID:2912
                    • C:\Windows\system32\WerFault.exe
                      C:\Windows\system32\WerFault.exe -u -p 2912 -s 3312
                      2⤵
                      • Program crash
                      • Suspicious behavior: EnumeratesProcesses
                      PID:4464
                  • C:\Windows\system32\DllHost.exe
                    C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
                    1⤵
                    • Suspicious use of WriteProcessMemory
                    PID:2736
                    • C:\Windows\system32\WerFault.exe
                      C:\Windows\system32\WerFault.exe -u -p 2736 -s 1012
                      2⤵
                      • Program crash
                      • Suspicious behavior: EnumeratesProcesses
                      PID:3444
                    • C:\Windows\system32\WerFault.exe
                      C:\Windows\system32\WerFault.exe -u -p 2736 -s 1012
                      2⤵
                      • Program crash
                      PID:4456
                  • C:\Windows\system32\svchost.exe
                    C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p
                    1⤵
                      PID:2540
                    • C:\Windows\system32\taskhostw.exe
                      taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
                      1⤵
                        PID:2296
                      • C:\Users\Admin\AppData\Local\Temp\23e7c1b52d6ea8adec233eaff38c6a00153de3b99f51b02fe6a297ee5210f9c8.exe
                        "C:\Users\Admin\AppData\Local\Temp\23e7c1b52d6ea8adec233eaff38c6a00153de3b99f51b02fe6a297ee5210f9c8.exe"
                        1⤵
                        • Checks computer location settings
                        • Suspicious behavior: EnumeratesProcesses
                        • Suspicious use of AdjustPrivilegeToken
                        • Suspicious use of WriteProcessMemory
                        PID:536
                        • 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\23e7c1b52d6ea8adec233eaff38c6a00153de3b99f51b02fe6a297ee5210f9c8.exe" /f
                          2⤵
                          • Suspicious use of WriteProcessMemory
                          PID:3740
                          • 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\23e7c1b52d6ea8adec233eaff38c6a00153de3b99f51b02fe6a297ee5210f9c8.exe" /f
                            3⤵
                            • Adds Run key to start application
                            PID:3780
                      • C:\Windows\system32\BackgroundTransferHost.exe
                        "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.1
                        1⤵
                          PID:2428
                          • C:\Windows\system32\WerFault.exe
                            C:\Windows\system32\WerFault.exe -u -p 2428 -s 2180
                            2⤵
                            • Program crash
                            • Checks processor information in registry
                            • Enumerates system info in registry
                            • Suspicious behavior: EnumeratesProcesses
                            PID:4448
                        • C:\Windows\system32\svchost.exe
                          C:\Windows\system32\svchost.exe -k wusvcs -p
                          1⤵
                            PID:2832
                          • C:\Windows\system32\WerFault.exe
                            C:\Windows\system32\WerFault.exe -pss -s 432 -p 2736 -ip 2736
                            1⤵
                            • Suspicious use of NtCreateProcessExOtherParentProcess
                            • Suspicious use of WriteProcessMemory
                            PID:3368
                          • C:\Windows\system32\WerFault.exe
                            C:\Windows\system32\WerFault.exe -pss -s 472 -p 2912 -ip 2912
                            1⤵
                            • Suspicious use of NtCreateProcessExOtherParentProcess
                            • Suspicious use of WriteProcessMemory
                            PID:3376
                          • C:\Windows\system32\WerFault.exe
                            C:\Windows\system32\WerFault.exe -pss -s 496 -p 2428 -ip 2428
                            1⤵
                            • Suspicious use of NtCreateProcessExOtherParentProcess
                            • Suspicious use of WriteProcessMemory
                            PID:2360
                          • C:\Windows\system32\MusNotifyIcon.exe
                            %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
                            1⤵
                              PID:5052
                            • C:\Windows\system32\svchost.exe
                              C:\Windows\system32\svchost.exe -k wusvcs -p
                              1⤵
                                PID:4476

                              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

                              3
                              T1012

                              System Information Discovery

                              4
                              T1082

                              Lateral Movement

                              Collection

                              Exfiltration

                              Command and Control

                              Impact

                              Replay Monitor

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                              Downloads

                              • memory/2236-130-0x00007FF6B7590000-0x00007FF6B791E000-memory.dmp
                                Filesize

                                3.6MB

                                Download
                              • memory/2296-131-0x00007FF6B7590000-0x00007FF6B791E000-memory.dmp
                                Filesize

                                3.6MB

                                Download
                              • memory/2736-133-0x000002A692210000-0x000002A692218000-memory.dmp
                                Filesize

                                32KB

                                Download
                              • memory/2736-134-0x000002A692020000-0x000002A692021000-memory.dmp
                                Filesize

                                4KB

                                Download
                              • memory/3544-132-0x00007FF6B7590000-0x00007FF6B791E000-memory.dmp
                                Filesize

                                3.6MB

                                Download