Overview

overview

10

Static

static

97f96adce3...a5.exe

windows7_x64

10

97f96adce3...a5.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    200s
  • max time network
    210s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    20/02/2022, 04:16

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General

  • Target
    97f96adce3c5f14cc0c061abe98555bc9ac042100af5db0226aa9e10f34430a5.exe
  • Size 384KB
  • Sample220220-ev2mgshfdk
  • SHA256 97f96adce3c5f14cc0c061abe98555bc9ac042100af5db0226aa9e10f34430a5
  • MD5 SHA1 SHA512
Score
10/10
ryukpersistenceransomware

Malware Config

Extracted

Path

  • C:\RyukReadMe.txt

  • 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 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 2 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 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Windows\System32\RuntimeBroker.exe
    C:\Windows\System32\RuntimeBroker.exe -Embedding
    1⤵
      PID:3676
    • C:\Windows\System32\RuntimeBroker.exe
      C:\Windows\System32\RuntimeBroker.exe -Embedding
      1⤵
        PID:3616
      • C:\Windows\System32\RuntimeBroker.exe
        C:\Windows\System32\RuntimeBroker.exe -Embedding
        1⤵
          PID:3208
        • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
          "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
          1⤵
            PID:2204
          • C:\Windows\System32\RuntimeBroker.exe
            C:\Windows\System32\RuntimeBroker.exe -Embedding
            1⤵
            • Suspicious use of UnmapMainImage
            PID:3000
          • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
            "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
            1⤵
              PID:2828
              • C:\Windows\system32\WerFault.exe
                C:\Windows\system32\WerFault.exe -u -p 2828 -s 3220
                2⤵
                • Program crash
                • Suspicious behavior: EnumeratesProcesses
                PID:2464
            • C:\Windows\system32\DllHost.exe
              C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
              1⤵
              • Suspicious use of WriteProcessMemory
              PID:2652
              • C:\Windows\system32\WerFault.exe
                C:\Windows\system32\WerFault.exe -u -p 2652 -s 388
                2⤵
                • Program crash
                • Suspicious behavior: EnumeratesProcesses
                PID:1008
              • C:\Windows\system32\WerFault.exe
                C:\Windows\system32\WerFault.exe -u -p 2652 -s 388
                2⤵
                • Program crash
                PID:3112
            • C:\Windows\system32\svchost.exe
              C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p
              1⤵
                PID:2456
              • C:\Windows\system32\taskhostw.exe
                taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
                1⤵
                  PID:2208
                • C:\Windows\system32\svchost.exe
                  C:\Windows\system32\svchost.exe -k UnistackSvcGroup
                  1⤵
                    PID:2160
                  • C:\Windows\system32\sihost.exe
                    sihost.exe
                    1⤵
                    • Drops file in Program Files directory
                    PID:2140
                  • C:\Users\Admin\AppData\Local\Temp\97f96adce3c5f14cc0c061abe98555bc9ac042100af5db0226aa9e10f34430a5.exe
                    "C:\Users\Admin\AppData\Local\Temp\97f96adce3c5f14cc0c061abe98555bc9ac042100af5db0226aa9e10f34430a5.exe"
                    1⤵
                    • Checks computer location settings
                    • Suspicious use of WriteProcessMemory
                    PID:2232
                    • C:\users\Public\uDqLV.exe
                      "C:\users\Public\uDqLV.exe" C:\Users\Admin\AppData\Local\Temp\97f96adce3c5f14cc0c061abe98555bc9ac042100af5db0226aa9e10f34430a5.exe
                      2⤵
                      • Executes dropped EXE
                      • Checks computer location settings
                      • Suspicious behavior: EnumeratesProcesses
                      • Suspicious use of AdjustPrivilegeToken
                      • Suspicious use of WriteProcessMemory
                      PID:3684
                      • 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\Public\uDqLV.exe" /f
                        3⤵
                        • 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\Public\uDqLV.exe" /f
                          4⤵
                          • Adds Run key to start application
                          PID:2608
                  • C:\Windows\system32\svchost.exe
                    C:\Windows\system32\svchost.exe -k wusvcs -p
                    1⤵
                      PID:2052
                    • C:\Windows\system32\WerFault.exe
                      C:\Windows\system32\WerFault.exe -pss -s 416 -p 2652 -ip 2652
                      1⤵
                      • Suspicious use of NtCreateProcessExOtherParentProcess
                      • Suspicious use of WriteProcessMemory
                      PID:3716
                    • C:\Windows\system32\WerFault.exe
                      C:\Windows\system32\WerFault.exe -pss -s 452 -p 2828 -ip 2828
                      1⤵
                      • Suspicious use of NtCreateProcessExOtherParentProcess
                      • Suspicious use of WriteProcessMemory
                      PID:2908

                    Network

                          MITRE ATT&CK Enterprise v6

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                          Downloads

                          memory/2140-132-0x00007FF6EF480000-0x00007FF6EF80E000-memory.dmp
                          Download

                          memory/2160-133-0x00007FF6EF480000-0x00007FF6EF80E000-memory.dmp
                          Download