Overview

overview

10

Static

static

3081e7cb25...8f.exe

windows7_x64

10

3081e7cb25...8f.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    182s
  • max time network
    202s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    20-02-2022 08:45

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General

  • Target

    3081e7cb254917f64638d21e52f307e6e1661ab64b8adaa50568578d1c3e888f.exe

  • Size

    150KB

  • MD5

    d7fe5e5a7f201faa9e4c170a6b5584de

  • SHA1

    b18fd85bd286be4390b6a2479dbbc63dac48ff56

  • SHA256

    3081e7cb254917f64638d21e52f307e6e1661ab64b8adaa50568578d1c3e888f

  • SHA512

    da7369aee1407d170217f0ec824cbaf38c5c4433280bd349ffc90ec0d57891bdc0e9f3b86c3f05b859ff665bb2d76464216c0dd4f93e22c6edba4fa6dfe58c0e

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: 1FRNVupsCyTjUvF36GxHZrvLaPtY6hgkTm Ryuk No system is safe
Wallets

1FRNVupsCyTjUvF36GxHZrvLaPtY6hgkTm

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • Suspicious use of NtCreateProcessExOtherParentProcess 1 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 2 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Modifies data under HKEY_USERS 45 IoCs
  • Modifies registry class 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Drops file in Program Files directory
    PID:2204
  • C:\Windows\system32\taskhostw.exe
    taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
    1⤵
      PID:2276
    • C:\Windows\system32\DllHost.exe
      C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:2712
      • C:\Windows\system32\WerFault.exe
        C:\Windows\system32\WerFault.exe -u -p 2712 -s 1004
        2⤵
        • Program crash
        • Suspicious behavior: EnumeratesProcesses
        PID:1828
    • C:\Windows\System32\RuntimeBroker.exe
      C:\Windows\System32\RuntimeBroker.exe -Embedding
      1⤵
      • Modifies registry class
      • Suspicious use of UnmapMainImage
      PID:2932
    • C:\Windows\system32\backgroundTaskHost.exe
      "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
      1⤵
        PID:2992
      • C:\Windows\system32\backgroundTaskHost.exe
        "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:CortanaUI.AppX3bn25b6f886wmg6twh46972vprk9tnbf.mca
        1⤵
          PID:2976
        • C:\Windows\System32\RuntimeBroker.exe
          C:\Windows\System32\RuntimeBroker.exe -Embedding
          1⤵
            PID:3372
          • C:\Windows\System32\RuntimeBroker.exe
            C:\Windows\System32\RuntimeBroker.exe -Embedding
            1⤵
              PID:2172
            • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
              "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
              1⤵
                PID:3024
              • C:\Windows\System32\RuntimeBroker.exe
                C:\Windows\System32\RuntimeBroker.exe -Embedding
                1⤵
                  PID:2948
                • 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 2844
                      2⤵
                      • Program crash
                      • Suspicious behavior: EnumeratesProcesses
                      PID:3956
                  • 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:2224
                      • C:\Users\Admin\AppData\Local\Temp\3081e7cb254917f64638d21e52f307e6e1661ab64b8adaa50568578d1c3e888f.exe
                        "C:\Users\Admin\AppData\Local\Temp\3081e7cb254917f64638d21e52f307e6e1661ab64b8adaa50568578d1c3e888f.exe"
                        1⤵
                        • Checks computer location settings
                        • Suspicious behavior: EnumeratesProcesses
                        • Suspicious use of AdjustPrivilegeToken
                        • Suspicious use of WriteProcessMemory
                        PID:2648
                        • 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\3081e7cb254917f64638d21e52f307e6e1661ab64b8adaa50568578d1c3e888f.exe" /f
                          2⤵
                          • Suspicious use of WriteProcessMemory
                          PID:3776
                          • 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\3081e7cb254917f64638d21e52f307e6e1661ab64b8adaa50568578d1c3e888f.exe" /f
                            3⤵
                            • Adds Run key to start application
                            PID:3696
                      • C:\Windows\system32\MusNotifyIcon.exe
                        %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
                        1⤵
                        • Checks processor information in registry
                        PID:3692
                      • C:\Windows\system32\WerFault.exe
                        C:\Windows\system32\WerFault.exe -pss -s 424 -p 2816 -ip 2816
                        1⤵
                        • Suspicious use of NtCreateProcessExOtherParentProcess
                        • Suspicious use of WriteProcessMemory
                        PID:1280
                      • 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:4128

                      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

                      • memory/2204-130-0x00007FF64CF90000-0x00007FF64D319000-memory.dmp
                        Filesize

                        3.5MB

                        Download
                      • memory/2224-131-0x00007FF64CF90000-0x00007FF64D319000-memory.dmp
                        Filesize

                        3.5MB

                        Download
                      • memory/2712-133-0x000001F6170A0000-0x000001F6170A8000-memory.dmp
                        Filesize

                        32KB

                        Download
                      • memory/2712-134-0x000001F617090000-0x000001F617091000-memory.dmp
                        Filesize

                        4KB

                        Download
                      • memory/2932-132-0x00007FF64CF90000-0x00007FF64D319000-memory.dmp
                        Filesize

                        3.5MB

                        Download