Overview

overview

10

Static

static

d91572ef64...6d.exe

windows7_x64

10

d91572ef64...6d.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    167s
  • max time network
    56s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 01:44

Sharing

Copy URL
Twitter E-mail
Report Analysis Logs

General

  • Target

    d91572ef64c5c77b1085a5e6cc40cab2a78f714288c29d1d8bdbb613aa5c9c6d.exe

  • Size

    201KB

  • MD5

    8fb17e62abc491dc6f8e9630d73d935d

  • SHA1

    ed0b184eb9b1e2a8b9f95b79cfcd691d2a4f4084

  • SHA256

    d91572ef64c5c77b1085a5e6cc40cab2a78f714288c29d1d8bdbb613aa5c9c6d

  • SHA512

    ee075b4a368175c773f400424b97e57de84e37d5858e4c938edd6df9cb6e4917f7fdc0a83df3fdf253fe0401f50cc702d307cf33d05898414796fb36f077039e

Score
10/10
ryukpersistenceransomware

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\RyukReadMe.html

Family

ryuk

Ransom Note
<html><body><p style="font-weight:bold;font-size:125%;top:0;left:0;"> [email protected] <br> </p><p style="position:absolute;bottom:0;right:1%;font-weight:bold;font-size:170%">balance of shadow universe</p><div style="font-size: 550%;font-weight:bold;width:50%;height:50%;overflow:auto;margin:auto;position:absolute;top:35%;left:40%;">Ryuk</div></body></html�������������������������������������������������������������������������������������������������������������������������������������������������������

Extracted

Path

C:\RyukReadMe.html

Family

ryuk

Ransom Note
[email protected] balance of shadow universe Ryuk

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 6 IoCs
    persistence
  • Enumerates physical storage devices 1 TTPs

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

  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 53 IoCs

Processes

  • C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    1⤵
      PID:1180
    • C:\Windows\system32\taskhost.exe
      "taskhost.exe"
      1⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1124
      • 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:\Windows\system32\taskhost.exe" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1100
        • C:\Windows\system32\reg.exe
          REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Windows\system32\taskhost.exe" /f
          3⤵
          • Adds Run key to start application
          PID:1728
      • C:\Windows\System32\net.exe
        "C:\Windows\System32\net.exe" stop "samss" /y
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1524
        • C:\Windows\system32\net1.exe
          C:\Windows\system32\net1 stop "samss" /y
          3⤵
            PID:1328
      • C:\Users\Admin\AppData\Local\Temp\d91572ef64c5c77b1085a5e6cc40cab2a78f714288c29d1d8bdbb613aa5c9c6d.exe
        "C:\Users\Admin\AppData\Local\Temp\d91572ef64c5c77b1085a5e6cc40cab2a78f714288c29d1d8bdbb613aa5c9c6d.exe"
        1⤵
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1248
        • C:\Users\Admin\AppData\Local\Temp\FVuraIN.exe
          "C:\Users\Admin\AppData\Local\Temp\FVuraIN.exe" 8 LAN
          2⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:524
          • C:\Windows\System32\net.exe
            "C:\Windows\System32\net.exe" stop "samss" /y
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:1152
            • C:\Windows\system32\net1.exe
              C:\Windows\system32\net1 stop "samss" /y
              4⤵
                PID:1192
            • 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\FVuraIN.exe" /f
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:9732
              • 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\FVuraIN.exe" /f
                4⤵
                • Adds Run key to start application
                PID:9756
          • C:\Windows\System32\net.exe
            "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:432
            • C:\Windows\system32\net1.exe
              C:\Windows\system32\net1 stop "audioendpointbuilder" /y
              3⤵
                PID:1516
            • C:\Windows\System32\net.exe
              "C:\Windows\System32\net.exe" stop "samss" /y
              2⤵
              • Suspicious use of WriteProcessMemory
              PID:1976
              • C:\Windows\system32\net1.exe
                C:\Windows\system32\net1 stop "samss" /y
                3⤵
                  PID:976
              • 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\d91572ef64c5c77b1085a5e6cc40cab2a78f714288c29d1d8bdbb613aa5c9c6d.exe" /f
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:1020
                • 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\d91572ef64c5c77b1085a5e6cc40cab2a78f714288c29d1d8bdbb613aa5c9c6d.exe" /f
                  3⤵
                  • Adds Run key to start application
                  PID:1484
              • C:\Windows\System32\net.exe
                "C:\Windows\System32\net.exe" stop "samss" /y
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:1932
                • C:\Windows\system32\net1.exe
                  C:\Windows\system32\net1 stop "samss" /y
                  3⤵
                    PID:1712

              Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              • memory/1124-61-0x000000013F940000-0x000000013FAB5000-memory.dmp

                Filesize

                1.5MB

                Download

              • memory/1124-59-0x000000013F940000-0x000000013FAB5000-memory.dmp

                Filesize

                1.5MB

                Download

              • memory/1180-62-0x000000013F940000-0x000000013FAB5000-memory.dmp

                Filesize

                1.5MB

                Download

              • memory/1248-55-0x000007FEFC031000-0x000007FEFC033000-memory.dmp

                Filesize

                8KB

                Download