Overview

overview

10

Static

static

be1b021843...5a.exe

windows7-x64

10

be1b021843...5a.exe

windows10-2004-x64

10

Resubmissions

07-11-2022 11:53

221107-n2tpwsedf5 10

07-11-2022 11:00

221107-m36keacfd7 10

Analysis

  • max time kernel
    179s
  • max time network
    248s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07-11-2022 11:00

Sharing

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General

  • Target

    be1b021843326399a29f22897b25162986389905d25102c47a7d7a5853cc315a.exe

  • Size

    885KB

  • MD5

    622bc38dee08e70e91e2be32a58b6d1f

  • SHA1

    7cfec4859fa7ca178095983b3f174f842a44b0c2

  • SHA256

    be1b021843326399a29f22897b25162986389905d25102c47a7d7a5853cc315a

  • SHA512

    176b6ef6eb7ca308df5418643c9054caa41de726546834aea0e964adbe011a127a3eb440becc32a7d7ff922e48242c73c5abeac0688feec123478597a542692d

  • SSDEEP

    12288:BdJPiMwyM02Jl5YqWYgeWYg955/155/0QebUlAAszsK6Qo1Rn6X:BPiMtklagQKUKRzsK6QmN6

Score
10/10
ryukdiscoveryevasionransomware

Malware Config

Extracted

Path

C:\ProgramData\RyukReadMe.txt

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 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. More than a year ago, world experts recognized the impossibility of deciphering by any means except the original decoder. No decryption software is available in the public. Antiviruse companies, researchers, IT specialists, and no other persons cant help you decrypt the data. DO NOT RESET OR SHUTDOWN - files may be damaged. DO NOT DELETE readme files. To confirm our honest intentions.Send 2 different random files and you will get it decrypted. It can be from different computers on your network to be sure that one key decrypts everything. 2 files we unlock for free To get info (decrypt your files) contact us at [email protected] or [email protected] You will receive btc address for payment in the reply letter Ryuk No system is safe

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • Disables Task Manager via registry modification
    evasion
  • Drops startup file 3 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
    discovery
  • 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
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 4 IoCs

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

    persistence
  • Kills process with taskkill 2 IoCs
    evasion
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Views/modifies file attributes 1 TTPs 3 IoCs
    evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\be1b021843326399a29f22897b25162986389905d25102c47a7d7a5853cc315a.exe
    "C:\Users\Admin\AppData\Local\Temp\be1b021843326399a29f22897b25162986389905d25102c47a7d7a5853cc315a.exe"
    1⤵
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4116
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c schtasks /CREATE /SC ONLOGON /TN RYUK /TR C:\ProgramData\ryuk.exe /RU SYSTEM /RL HIGHEST /F
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4824
      • C:\Windows\system32\schtasks.exe
        schtasks /CREATE /SC ONLOGON /TN RYUK /TR C:\ProgramData\ryuk.exe /RU SYSTEM /RL HIGHEST /F
        3⤵
        • Creates scheduled task(s)
        PID:1740
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c copy C:\ProgramData\ryuk.exe "%appdata%\Microsoft\Windows\Start Menu\Programs\Startup\ryuk.exe"
      2⤵
      • Drops startup file
      PID:4184
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c copy C:\ProgramData\ryuk.exe "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\ryuk.exe"
      2⤵
        PID:3292
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c schtasks /CREATE /SC ONLOGON /TN RYUK /TR C:\ProgramData\ryuk.exe /F
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4828
        • C:\Windows\system32\schtasks.exe
          schtasks /CREATE /SC ONLOGON /TN RYUK /TR C:\ProgramData\ryuk.exe /F
          3⤵
          • Creates scheduled task(s)
          PID:2432
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c attrib +h +s "%appdata%\Microsoft\Windows\Start Menu\Programs\Startup\ryuk.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1560
        • C:\Windows\system32\attrib.exe
          attrib +h +s "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ryuk.exe"
          3⤵
          • Drops startup file
          • Views/modifies file attributes
          PID:4944
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c schtasks /CREATE /SC ONLOGON /TN ryk /TR "C:\Users\Admin\AppData\Local\Temp\be1b021843326399a29f22897b25162986389905d25102c47a7d7a5853cc315a.exe" /RU SYSTEM /RL HIGHEST /F
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:920
        • C:\Windows\system32\schtasks.exe
          schtasks /CREATE /SC ONLOGON /TN ryk /TR "C:\Users\Admin\AppData\Local\Temp\be1b021843326399a29f22897b25162986389905d25102c47a7d7a5853cc315a.exe" /RU SYSTEM /RL HIGHEST /F
          3⤵
          • Creates scheduled task(s)
          PID:2692
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c schtasks /CREATE /SC ONLOGON /TN RyuK /TR "C:\Users\Admin\AppData\Local\Temp\be1b021843326399a29f22897b25162986389905d25102c47a7d7a5853cc315a.exe" /F
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4736
        • C:\Windows\system32\schtasks.exe
          schtasks /CREATE /SC ONLOGON /TN RyuK /TR "C:\Users\Admin\AppData\Local\Temp\be1b021843326399a29f22897b25162986389905d25102c47a7d7a5853cc315a.exe" /F
          3⤵
          • Creates scheduled task(s)
          PID:1352
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c attrib +h +s ryuk.exe
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:116
        • C:\Windows\system32\attrib.exe
          attrib +h +s ryuk.exe
          3⤵
          • Views/modifies file attributes
          PID:1780
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c attrib +h +s C:\ProgramData\ryuk.exe
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3552
        • C:\Windows\system32\attrib.exe
          attrib +h +s C:\ProgramData\ryuk.exe
          3⤵
          • Views/modifies file attributes
          PID:1748
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c start cmd.exe /c icacls * /grant Everyone:(OI)(CI)F /T /C /Q
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1920
        • C:\Windows\system32\cmd.exe
          cmd.exe /c icacls * /grant Everyone:(OI)(CI)F /T /C /Q
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1384
          • C:\Windows\system32\icacls.exe
            icacls * /grant Everyone:(OI)(CI)F /T /C /Q
            4⤵
            • Modifies file permissions
            PID:4720
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c start cmd.exe /c taskkill /t /f /im sql* && taskkill /f /t /im veeam* && taskkill /F /T /IM MSExchange* && taskkill /F /T /IM Microsoft.Exchange* && taskkill /F /T /IM pvx* && taskkill /F /T /IM dbsrv* && exit
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3828
        • C:\Windows\system32\cmd.exe
          cmd.exe /c taskkill /t /f /im sql*
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:3580
          • C:\Windows\system32\taskkill.exe
            taskkill /t /f /im sql*
            4⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:3380
        • C:\Windows\system32\taskkill.exe
          taskkill /f /t /im veeam*
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:2752
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c reg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLinkedConnections /t REG_DWORD /d 1 /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3064
        • C:\Windows\system32\reg.exe
          reg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLinkedConnections /t REG_DWORD /d 1 /f
          3⤵
            PID:3508
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c Copy hrmlog1 C:\ProgramData\hrmlog1
          2⤵
            PID:1188
          • C:\Windows\system32\cmd.exe
            C:\Windows\system32\cmd.exe /c Copy hrmlog2 C:\ProgramData\hrmlog2
            2⤵
              PID:2304
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c Copy RYUKID C:\ProgramData\RYUKID
              2⤵
                PID:4964
              • C:\Windows\system32\cmd.exe
                C:\Windows\system32\cmd.exe /c Copy C:\ProgramData\hrmlog1 %userprofile%\Desktop\hrmlog1
                2⤵
                  PID:3504
                • C:\Windows\system32\cmd.exe
                  C:\Windows\system32\cmd.exe /c Copy "C:\ProgramData\RyukReadMe.txt " "%userprofile%\Desktop\RyukReadMe.txt "
                  2⤵
                    PID:1048
                  • C:\Windows\system32\cmd.exe
                    C:\Windows\system32\cmd.exe /c reg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
                    2⤵
                    • Suspicious use of WriteProcessMemory
                    PID:1904
                    • C:\Windows\system32\reg.exe
                      reg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
                      3⤵
                        PID:4960
                    • C:\Windows\system32\cmd.exe
                      C:\Windows\system32\cmd.exe /c reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware /t REG_DWORD /d 1 /f
                      2⤵
                        PID:3464
                        • C:\Windows\system32\reg.exe
                          reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware /t REG_DWORD /d 1 /f
                          3⤵
                            PID:3968
                        • C:\Windows\system32\cmd.exe
                          C:\Windows\system32\cmd.exe /c reg delete HKEY_CURRENT_USER\System\CurrentControlSet\Control\SafeBoot /va /F
                          2⤵
                            PID:4232
                            • C:\Windows\system32\reg.exe
                              reg delete HKEY_CURRENT_USER\System\CurrentControlSet\Control\SafeBoot /va /F
                              3⤵
                                PID:4172
                            • C:\Windows\system32\cmd.exe
                              C:\Windows\system32\cmd.exe /c reg delete HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\SafeBoot /va /F
                              2⤵
                                PID:408
                                • C:\Windows\system32\reg.exe
                                  reg delete HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\SafeBoot /va /F
                                  3⤵
                                    PID:2428

                              Network

                              MITRE ATT&CK Enterprise v6

                              Replay Monitor

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                              Downloads

                              • C:\ProgramData\RYUKID
                                Filesize

                                8B

                                MD5

                                b01925eb79aff868999d7be561726324

                                SHA1

                                b005a53561fa9014d5c7cb0bf3957dfa57a7bada

                                SHA256

                                b903fbfd70ec7520a68c3492f98ade4bf7ef8fd59353108faa7ea9583e2b1351

                                SHA512

                                f47764a971de47e8ca400e60ea950a339c86b213c20c29b392bfc9f83750280050f2d0ebd4d4d36cd4b956c906df31b543b394dcf42e3f92797f8eb044630b74

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                              • C:\ProgramData\RyukReadMe.txt
                                Filesize

                                1KB

                                MD5

                                fdb92b73b4370f248e57b5292cb4b507

                                SHA1

                                5d86a3818e4c38d4821372900f21f8ec62d97efc

                                SHA256

                                40f33de8d0fd8293c3d03b3b2a043c7e4e96393510e686b90acebf485bbf0477

                                SHA512

                                76b35870a8c7a29a0ce36e548531dc6b09abb51b52781835c87fb7e6c276b84948137aa9f001b717ca0b9ffb0b27f47bae5fbb1be483aa74dbd2542409c387a9

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                              • C:\ProgramData\hrmlog1
                                Filesize

                                2KB

                                MD5

                                ff8feba02850750ae3acad613386c7ed

                                SHA1

                                1421b720388fa05fddf2a862f3994bc181b489be

                                SHA256

                                85c14336594b6da93be145ee495414f6550b1e9f47728a31e1acb7d822ecd945

                                SHA512

                                e8765fe8fd3413b833fbd2b0e76ea0e71b6079acf78a8ba7dc4adf19af00b7749eb48030e3cd62933b3842fd8d2d12e7bb4cdc64f33fdb1953282e83a63063ec

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                              • C:\ProgramData\hrmlog1
                                Filesize

                                2KB

                                MD5

                                ff8feba02850750ae3acad613386c7ed

                                SHA1

                                1421b720388fa05fddf2a862f3994bc181b489be

                                SHA256

                                85c14336594b6da93be145ee495414f6550b1e9f47728a31e1acb7d822ecd945

                                SHA512

                                e8765fe8fd3413b833fbd2b0e76ea0e71b6079acf78a8ba7dc4adf19af00b7749eb48030e3cd62933b3842fd8d2d12e7bb4cdc64f33fdb1953282e83a63063ec

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                              • C:\ProgramData\hrmlog2
                                Filesize

                                292B

                                MD5

                                2c0abc2f3a1febd00ca8f8fee4bd2683

                                SHA1

                                56e1028e3bd457270089d470af7b3edbb344aca8

                                SHA256

                                f4942012d19f5ae56209c3b9c1b6cb6a7ee4b5dcd0dc0e74a93bb8ad6f52d6a1

                                SHA512

                                5ad31220773af2ddef907f85908e334f433675db8863559df6ff7afde29771539a7938d710f2cfc6f225916c5bf7d5b96566fe856d924c0fb7ff57829b603bbc

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                              • C:\ProgramData\hrmlog2
                                Filesize

                                292B

                                MD5

                                2c0abc2f3a1febd00ca8f8fee4bd2683

                                SHA1

                                56e1028e3bd457270089d470af7b3edbb344aca8

                                SHA256

                                f4942012d19f5ae56209c3b9c1b6cb6a7ee4b5dcd0dc0e74a93bb8ad6f52d6a1

                                SHA512

                                5ad31220773af2ddef907f85908e334f433675db8863559df6ff7afde29771539a7938d710f2cfc6f225916c5bf7d5b96566fe856d924c0fb7ff57829b603bbc

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                              • C:\ProgramData\ryuk.exe
                                Filesize

                                885KB

                                MD5

                                622bc38dee08e70e91e2be32a58b6d1f

                                SHA1

                                7cfec4859fa7ca178095983b3f174f842a44b0c2

                                SHA256

                                be1b021843326399a29f22897b25162986389905d25102c47a7d7a5853cc315a

                                SHA512

                                176b6ef6eb7ca308df5418643c9054caa41de726546834aea0e964adbe011a127a3eb440becc32a7d7ff922e48242c73c5abeac0688feec123478597a542692d

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                              • C:\Users\Admin\AppData\Local\Temp\RYUKID
                                Filesize

                                8B

                                MD5

                                b01925eb79aff868999d7be561726324

                                SHA1

                                b005a53561fa9014d5c7cb0bf3957dfa57a7bada

                                SHA256

                                b903fbfd70ec7520a68c3492f98ade4bf7ef8fd59353108faa7ea9583e2b1351

                                SHA512

                                f47764a971de47e8ca400e60ea950a339c86b213c20c29b392bfc9f83750280050f2d0ebd4d4d36cd4b956c906df31b543b394dcf42e3f92797f8eb044630b74

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                              • C:\Users\Admin\AppData\Local\Temp\hrmlog1
                                Filesize

                                2KB

                                MD5

                                ff8feba02850750ae3acad613386c7ed

                                SHA1

                                1421b720388fa05fddf2a862f3994bc181b489be

                                SHA256

                                85c14336594b6da93be145ee495414f6550b1e9f47728a31e1acb7d822ecd945

                                SHA512

                                e8765fe8fd3413b833fbd2b0e76ea0e71b6079acf78a8ba7dc4adf19af00b7749eb48030e3cd62933b3842fd8d2d12e7bb4cdc64f33fdb1953282e83a63063ec

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                              • C:\Users\Admin\AppData\Local\Temp\hrmlog2
                                Filesize

                                292B

                                MD5

                                2c0abc2f3a1febd00ca8f8fee4bd2683

                                SHA1

                                56e1028e3bd457270089d470af7b3edbb344aca8

                                SHA256

                                f4942012d19f5ae56209c3b9c1b6cb6a7ee4b5dcd0dc0e74a93bb8ad6f52d6a1

                                SHA512

                                5ad31220773af2ddef907f85908e334f433675db8863559df6ff7afde29771539a7938d710f2cfc6f225916c5bf7d5b96566fe856d924c0fb7ff57829b603bbc

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                              • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ryuk.exe
                                Filesize

                                885KB

                                MD5

                                622bc38dee08e70e91e2be32a58b6d1f

                                SHA1

                                7cfec4859fa7ca178095983b3f174f842a44b0c2

                                SHA256

                                be1b021843326399a29f22897b25162986389905d25102c47a7d7a5853cc315a

                                SHA512

                                176b6ef6eb7ca308df5418643c9054caa41de726546834aea0e964adbe011a127a3eb440becc32a7d7ff922e48242c73c5abeac0688feec123478597a542692d

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