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Overview

overview

10

Static

static

8

0323b4326b...02.exe

windows7_x64

10

0323b4326b...02.exe

windows10_x64

10

0898a80dc2...92.exe

windows7_x64

10

0898a80dc2...92.exe

windows10_x64

10

0aaecf7f77...91.exe

windows7_x64

10

0aaecf7f77...91.exe

windows10_x64

10

150e8ef3f1...02.exe

windows7_x64

10

150e8ef3f1...02.exe

windows10_x64

10

23e95ba676...7f.exe

windows7_x64

10

23e95ba676...7f.exe

windows10_x64

10

28e7dc4aeb...33.exe

windows7_x64

28e7dc4aeb...33.exe

windows10_x64

10

350b0d6ae2...d7.exe

windows7_x64

1

350b0d6ae2...d7.exe

windows10_x64

1

3a6ebac4f8...ca.exe

windows7_x64

10

3a6ebac4f8...ca.exe

windows10_x64

10

3fe801df14...4f.exe

windows7_x64

8

3fe801df14...4f.exe

windows10_x64

8

41367ad447...00.exe

windows7_x64

10

41367ad447...00.exe

windows10_x64

10

48f4749f13...77.exe

windows7_x64

1

48f4749f13...77.exe

windows10_x64

1

499d936c22...82.exe

windows7_x64

10

499d936c22...82.exe

windows10_x64

10

4b5a6926ab...d1.exe

windows7_x64

1

4b5a6926ab...d1.exe

windows10_x64

1

4bb0d8eb6b...81.exe

windows7_x64

10

4bb0d8eb6b...81.exe

windows10_x64

10

5de3d5a337...ed.exe

windows7_x64

10

5de3d5a337...ed.exe

windows10_x64

10

5e2b2fe65d...20.exe

windows7_x64

1

5e2b2fe65d...20.exe

windows10_x64

3

Analysis

  • max time kernel
    131s
  • max time network
    141s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    30/03/2021, 11:28

Sharing

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General

  • Target

    28e7dc4aebbfea61a2ad942f00ecab3bbb32a636679587a6fbd6c8dd69a0ef33.exe

  • Size

    321KB

  • MD5

    04ba14a9828b000add142d0bcb42ac2d

  • SHA1

    928a705a481384dee3aa9985bb2a9e1e6827902f

  • SHA256

    28e7dc4aebbfea61a2ad942f00ecab3bbb32a636679587a6fbd6c8dd69a0ef33

  • SHA512

    2fc56d6fdf360c0435f76822f3d99288c3b31462931eb128c7ed895bf93d88b00663801c1a5394b1ae5bb081ac76b004deaf46fdf2b0b9c027b2945a7c030909

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 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
  • Modifies extensions of user files 1 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Drops startup file 1 IoCs
  • 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.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe
    "C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe" -ServerName:App.AppXtk181tbxbce2qsex02s8tw7hfxa9xb3t.mca
    1⤵
      PID:3200
    • C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe
      "C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe" -ServerName:CortanaUI.AppXa50dqqa5gqv4a428c9y1jjw7m3btvepj.mca
      1⤵
        PID:3212
      • C:\Windows\system32\DllHost.exe
        C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
        1⤵
          PID:3736
        • C:\Windows\System32\RuntimeBroker.exe
          C:\Windows\System32\RuntimeBroker.exe -Embedding
          1⤵
            PID:3436
          • C:\Users\Admin\AppData\Local\Temp\28e7dc4aebbfea61a2ad942f00ecab3bbb32a636679587a6fbd6c8dd69a0ef33.exe
            "C:\Users\Admin\AppData\Local\Temp\28e7dc4aebbfea61a2ad942f00ecab3bbb32a636679587a6fbd6c8dd69a0ef33.exe"
            1⤵
            • Modifies extensions of user files
            • Drops startup file
            • Drops file in Program Files directory
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:1192
            • C:\Windows\SysWOW64\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\28e7dc4aebbfea61a2ad942f00ecab3bbb32a636679587a6fbd6c8dd69a0ef33.exe" /f /reg:64
              2⤵
              • Suspicious use of WriteProcessMemory
              PID:2012
              • C:\Windows\SysWOW64\reg.exe
                REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\28e7dc4aebbfea61a2ad942f00ecab3bbb32a636679587a6fbd6c8dd69a0ef33.exe" /f /reg:64
                3⤵
                • Adds Run key to start application
                PID:2688
          • c:\windows\system32\taskhostw.exe
            taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
            1⤵
              PID:2452
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k unistacksvcgroup -s CDPUserSvc
              1⤵
                PID:2332
              • c:\windows\system32\sihost.exe
                sihost.exe
                1⤵
                  PID:2324

                Network

                MITRE ATT&CK Enterprise v6

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