Windows 7 deprecation

Windows 7 will be removed from tria.ge on 2025-03-31

Overview

overview

10

Static

static

Ryuk

windows7_x64

10

Analysis

  • max time kernel
    301s
  • max time network
    75s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    22/04/2021, 09:34

Sharing

Copy URL
Twitter E-mail
Report Analysis Logs

General

  • Target

    parsimonious-stage.exe

  • Size

    123KB

  • MD5

    bbcc8fa58b88f33072443389a790295a

  • SHA1

    8d72096b46e5fcf5489826e510ffc19aa2007aaa

  • SHA256

    97fc2de5893ec046b4c12520a7fca2afe25254f0959dcd39796da90336f3c1ad

  • SHA512

    cd9ac7f25517fd5d96d84e37087d198aeb02dd32ff7034349c65c91ec9c01693f7ed23b141829d1f5846814d9618c82fae5fd0fe8ed82476d618b04acf79a296

Score
10/10
ryukdiscoveryransomware

Malware Config

Extracted

Path

C:\users\Public\RyukReadMe.html

Family

ryuk

Ransom Note
contact balance of shadow universe Ryuk function info(){alert("INSTRUCTION:\r\n1. Download tor browser.\r\n2. Open link through tor browser: " + $torlink + "\r\n3. Fill the form, your password: "+ $password +"\r\nWe will contact you shortly.\r\nAlways send files for test decryption.");};

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • Executes dropped EXE 3 IoCs
  • Modifies extensions of user files 5 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Loads dropped DLL 16 IoCs
  • Modifies file permissions 1 TTPs 2 IoCs
    discovery
  • Drops desktop.ini file(s) 1 IoCs
  • Enumerates connected drives 3 TTPs 24 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 14 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistence
  • Modifies data under HKEY_USERS 3 IoCs
  • Modifies registry class 20 IoCs
  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 43 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\parsimonious-stage.exe
    "C:\Users\Admin\AppData\Local\Temp\parsimonious-stage.exe"
    1⤵
    • Modifies extensions of user files
    • Loads dropped DLL
    • Drops desktop.ini file(s)
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1832
    • C:\Users\Admin\AppData\Local\Temp\iEYVwulLNrep.exe
      "C:\Users\Admin\AppData\Local\Temp\iEYVwulLNrep.exe" 9 REP
      2⤵
      • Executes dropped EXE
      PID:568
    • C:\Users\Admin\AppData\Local\Temp\vckEeIVRplan.exe
      "C:\Users\Admin\AppData\Local\Temp\vckEeIVRplan.exe" 8 LAN
      2⤵
      • Executes dropped EXE
      PID:1644
    • C:\Users\Admin\AppData\Local\Temp\KhParraPAlan.exe
      "C:\Users\Admin\AppData\Local\Temp\KhParraPAlan.exe" 8 LAN
      2⤵
      • Executes dropped EXE
      PID:2624
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\*" /grant Everyone:F /T /C /Q
      2⤵
      • Modifies file permissions
      PID:2696
    • C:\Windows\SysWOW64\icacls.exe
      icacls "D:\*" /grant Everyone:F /T /C /Q
      2⤵
      • Modifies file permissions
      PID:2708
    • C:\Windows\SysWOW64\net.exe
      "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3280
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop "audioendpointbuilder" /y
        3⤵
          PID:3328
      • C:\Windows\SysWOW64\net.exe
        "C:\Windows\System32\net.exe" stop "samss" /y
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3320
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop "samss" /y
          3⤵
            PID:3792
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:3396
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 stop "audioendpointbuilder" /y
            3⤵
              PID:3824
          • C:\Windows\SysWOW64\net.exe
            "C:\Windows\System32\net.exe" stop "samss" /y
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:3232
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 stop "samss" /y
              3⤵
                PID:1056
            • C:\Windows\SysWOW64\net.exe
              "C:\Windows\System32\net.exe" stop "samss" /y
              2⤵
                PID:6752
                • C:\Windows\SysWOW64\net1.exe
                  C:\Windows\system32\net1 stop "samss" /y
                  3⤵
                    PID:7548
                • C:\Windows\SysWOW64\net.exe
                  "C:\Windows\System32\net.exe" stop "samss" /y
                  2⤵
                    PID:7668
                    • C:\Windows\SysWOW64\net1.exe
                      C:\Windows\system32\net1 stop "samss" /y
                      3⤵
                        PID:7872
                    • C:\Windows\SysWOW64\SCHTASKS.exe
                      SCHTASKS /CREATE /NP /SC DAILY /TN "PrintRS" /TR "C:\Windows\System32\cmd.exe /c for /l %x in (1,1,50) do start wordpad.exe /p C:\users\Public\KXV6V.dll" /ST 10:25 /SD 04/23/2021 /ED 04/30/2021
                      2⤵
                      • Creates scheduled task(s)
                      PID:6828
                    • C:\Windows\SysWOW64\net.exe
                      "C:\Windows\System32\net.exe" stop "samss" /y
                      2⤵
                        PID:8848
                        • C:\Windows\SysWOW64\net1.exe
                          C:\Windows\system32\net1 stop "samss" /y
                          3⤵
                            PID:8876
                        • C:\Windows\SysWOW64\net.exe
                          "C:\Windows\System32\net.exe" stop "samss" /y
                          2⤵
                            PID:8892
                            • C:\Windows\SysWOW64\net1.exe
                              C:\Windows\system32\net1 stop "samss" /y
                              3⤵
                                PID:8920
                          • C:\Windows\system32\msiexec.exe
                            C:\Windows\system32\msiexec.exe /V
                            1⤵
                            • Loads dropped DLL
                            • Enumerates connected drives
                            • Drops file in Windows directory
                            • Modifies data under HKEY_USERS
                            • Modifies registry class
                            • Suspicious behavior: EnumeratesProcesses
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of WriteProcessMemory
                            PID:2964
                            • C:\Windows\syswow64\MsiExec.exe
                              C:\Windows\syswow64\MsiExec.exe -Embedding 1CA015DDFC20D953F37DB6D076A7B246
                              2⤵
                              • Loads dropped DLL
                              PID:2892
                            • C:\Windows\system32\MsiExec.exe
                              C:\Windows\system32\MsiExec.exe -Embedding 5D0E4D66F952E1864E858500339D17AD
                              2⤵
                              • Loads dropped DLL
                              PID:4140

                          Network

                          MITRE ATT&CK Enterprise v6

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          • memory/1832-59-0x0000000074D91000-0x0000000074D93000-memory.dmp

                            Filesize

                            8KB

                            Download

                          • memory/2892-143-0x0000000000221000-0x0000000000222000-memory.dmp

                            Filesize

                            4KB

                            Download

                          • memory/2964-140-0x000007FEFB681000-0x000007FEFB683000-memory.dmp

                            Filesize

                            8KB

                            Download