Overview

overview

10

Static

static

73dba5d046...6b.exe

windows7_x64

10

73dba5d046...6b.exe

windows10-2004_x64

8

Analysis

  • max time kernel
    190s
  • max time network
    89s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 05:45

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General

  • Target

    73dba5d04608fbc2fc53ea986585f0b35bdc24a7bb30c6b43e83a5a9278cd16b.exe

  • Size

    202KB

  • MD5

    c49c19e172c2c6f8390bd26258557b18

  • SHA1

    641d8da9c08060b04fc63b07c61e1c891d5d393a

  • SHA256

    73dba5d04608fbc2fc53ea986585f0b35bdc24a7bb30c6b43e83a5a9278cd16b

  • SHA512

    a66789da1fd31f46f04937ed507662ec0bf68c13f27f1cb0a63ddcc977f33073f3769abdcb4206651781f0e2151c93d7155358367dd1a43d4216200968e220bc

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:\Users\Admin\AppData\Local\Temp\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 54 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\73dba5d04608fbc2fc53ea986585f0b35bdc24a7bb30c6b43e83a5a9278cd16b.exe
    "C:\Users\Admin\AppData\Local\Temp\73dba5d04608fbc2fc53ea986585f0b35bdc24a7bb30c6b43e83a5a9278cd16b.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1488
    • C:\Users\Admin\AppData\Local\Temp\BwDVIKn.exe
      "C:\Users\Admin\AppData\Local\Temp\BwDVIKn.exe" 8 LAN
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1104
      • C:\Windows\System32\net.exe
        "C:\Windows\System32\net.exe" stop "samss" /y
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2008
        • C:\Windows\system32\net1.exe
          C:\Windows\system32\net1 stop "samss" /y
          4⤵
            PID:1704
        • 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\BwDVIKn.exe" /f
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:15504
          • 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\BwDVIKn.exe" /f
            4⤵
            • Adds Run key to start application
            PID:15532
      • C:\Windows\System32\net.exe
        "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1640
        • C:\Windows\system32\net1.exe
          C:\Windows\system32\net1 stop "audioendpointbuilder" /y
          3⤵
            PID:1568
        • C:\Windows\System32\net.exe
          "C:\Windows\System32\net.exe" stop "samss" /y
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1244
          • C:\Windows\system32\net1.exe
            C:\Windows\system32\net1 stop "samss" /y
            3⤵
              PID:2000
          • 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\73dba5d04608fbc2fc53ea986585f0b35bdc24a7bb30c6b43e83a5a9278cd16b.exe" /f
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1132
            • 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\73dba5d04608fbc2fc53ea986585f0b35bdc24a7bb30c6b43e83a5a9278cd16b.exe" /f
              3⤵
              • Adds Run key to start application
              PID:2308
          • C:\Windows\System32\net.exe
            "C:\Windows\System32\net.exe" stop "samss" /y
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1300
            • C:\Windows\system32\net1.exe
              C:\Windows\system32\net1 stop "samss" /y
              3⤵
                PID:892
          • C:\Windows\system32\Dwm.exe
            "C:\Windows\system32\Dwm.exe"
            1⤵
              PID:1352
            • C:\Windows\system32\taskhost.exe
              "taskhost.exe"
              1⤵
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:1260
              • C:\Windows\System32\net.exe
                "C:\Windows\System32\net.exe" stop "samss" /y
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:1484
                • C:\Windows\system32\net1.exe
                  C:\Windows\system32\net1 stop "samss" /y
                  3⤵
                    PID:900
                • 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:1508
                  • 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:2316

              Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

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              Downloads

              • memory/1260-60-0x000000013FE70000-0x000000013FFE5000-memory.dmp

                Filesize

                1.5MB

                Download

              • memory/1260-58-0x000000013FE70000-0x000000013FFE5000-memory.dmp

                Filesize

                1.5MB

                Download

              • memory/1488-54-0x000007FEFBE91000-0x000007FEFBE93000-memory.dmp

                Filesize

                8KB

                Download