Overview

overview

10

Static

static

a02107e2dc...cd.exe

windows7_x64

10

a02107e2dc...cd.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    161s
  • max time network
    199s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    20-02-2022 03:56

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General

  • Target

    a02107e2dc63a86777f46ed7d3c18ef4485eac83cb14ca1a0fca2f4d80e815cd.exe

  • Size

    201KB

  • MD5

    bf39de2f9f4f5070199213161d9d6c05

  • SHA1

    5ce23ef35396f777855f7a3b05e47329cc7226b7

  • SHA256

    a02107e2dc63a86777f46ed7d3c18ef4485eac83cb14ca1a0fca2f4d80e815cd

  • SHA512

    1c0c591c5fdb65fc33c2ded6e89ab65aac5f45996068ca2e0b0d8a56d56371f9c104cfa15641af7bee4127a92d69fa5ed43a7f8dd8bc251440ea8b513e262cd9

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:\Documents and Settings\Admin\AppData\Local\Adobe\Color\Profiles\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
  • 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 6 IoCs
    persistence
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Modifies registry class 64 IoCs
  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 20 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 61 IoCs

Processes

  • C:\Windows\system32\DllHost.exe
    C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2744
    • C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 2744 -s 1020
      2⤵
      • Program crash
      PID:4836
  • C:\Windows\System32\RuntimeBroker.exe
    C:\Windows\System32\RuntimeBroker.exe -Embedding
    1⤵
      PID:2984
    • C:\Windows\system32\backgroundTaskHost.exe
      "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
      1⤵
        PID:1324
      • C:\Windows\system32\backgroundTaskHost.exe
        "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:CortanaUI.AppX3bn25b6f886wmg6twh46972vprk9tnbf.mca
        1⤵
          PID:4056
        • C:\Windows\System32\RuntimeBroker.exe
          C:\Windows\System32\RuntimeBroker.exe -Embedding
          1⤵
          • Modifies registry class
          PID:2572
        • C:\Windows\System32\RuntimeBroker.exe
          C:\Windows\System32\RuntimeBroker.exe -Embedding
          1⤵
            PID:3324
          • C:\Windows\System32\RuntimeBroker.exe
            C:\Windows\System32\RuntimeBroker.exe -Embedding
            1⤵
              PID:2628
            • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
              "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
              1⤵
                PID:3064
              • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
                "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
                1⤵
                • Suspicious use of AdjustPrivilegeToken
                PID:2904
              • C:\Windows\system32\svchost.exe
                C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p
                1⤵
                  PID:2528
                • C:\Windows\system32\taskhostw.exe
                  taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
                  1⤵
                    PID:2296
                  • C:\Windows\system32\svchost.exe
                    C:\Windows\system32\svchost.exe -k UnistackSvcGroup
                    1⤵
                      PID:2244
                    • C:\Windows\system32\sihost.exe
                      sihost.exe
                      1⤵
                      • Suspicious behavior: EnumeratesProcesses
                      • Suspicious use of AdjustPrivilegeToken
                      • Suspicious use of WriteProcessMemory
                      PID:2228
                      • C:\Windows\System32\net.exe
                        "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
                        2⤵
                        • Suspicious use of WriteProcessMemory
                        PID:1424
                        • C:\Windows\system32\net1.exe
                          C:\Windows\system32\net1 stop "audioendpointbuilder" /y
                          3⤵
                            PID:2512
                        • 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\sihost.exe" /f
                          2⤵
                          • Suspicious use of WriteProcessMemory
                          PID:2504
                          • C:\Windows\system32\reg.exe
                            REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Windows\system32\sihost.exe" /f
                            3⤵
                            • Adds Run key to start application
                            PID:4460
                        • C:\Windows\System32\net.exe
                          "C:\Windows\System32\net.exe" stop "samss" /y
                          2⤵
                          • Suspicious use of WriteProcessMemory
                          PID:428
                          • C:\Windows\system32\net1.exe
                            C:\Windows\system32\net1 stop "samss" /y
                            3⤵
                              PID:4380
                        • C:\Users\Admin\AppData\Local\Temp\a02107e2dc63a86777f46ed7d3c18ef4485eac83cb14ca1a0fca2f4d80e815cd.exe
                          "C:\Users\Admin\AppData\Local\Temp\a02107e2dc63a86777f46ed7d3c18ef4485eac83cb14ca1a0fca2f4d80e815cd.exe"
                          1⤵
                          • Checks computer location settings
                          • Suspicious behavior: EnumeratesProcesses
                          • Suspicious use of AdjustPrivilegeToken
                          • Suspicious use of WriteProcessMemory
                          PID:2840
                          • C:\Users\Admin\AppData\Local\Temp\kuKnEoN.exe
                            "C:\Users\Admin\AppData\Local\Temp\kuKnEoN.exe" 8 LAN
                            2⤵
                            • Executes dropped EXE
                            • Checks computer location settings
                            • Suspicious behavior: EnumeratesProcesses
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of WriteProcessMemory
                            PID:3716
                            • C:\Windows\System32\net.exe
                              "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
                              3⤵
                              • Suspicious use of WriteProcessMemory
                              PID:2144
                              • C:\Windows\system32\net1.exe
                                C:\Windows\system32\net1 stop "audioendpointbuilder" /y
                                4⤵
                                  PID:4332
                              • C:\Windows\System32\net.exe
                                "C:\Windows\System32\net.exe" stop "samss" /y
                                3⤵
                                • Suspicious use of WriteProcessMemory
                                PID:4320
                                • C:\Windows\system32\net1.exe
                                  C:\Windows\system32\net1 stop "samss" /y
                                  4⤵
                                    PID:4452
                                • 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\kuKnEoN.exe" /f
                                  3⤵
                                  • Suspicious use of WriteProcessMemory
                                  PID:6008
                                  • 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\kuKnEoN.exe" /f
                                    4⤵
                                    • Adds Run key to start application
                                    PID:6060
                              • C:\Windows\System32\net.exe
                                "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
                                2⤵
                                • Suspicious use of WriteProcessMemory
                                PID:1580
                                • C:\Windows\system32\net1.exe
                                  C:\Windows\system32\net1 stop "audioendpointbuilder" /y
                                  3⤵
                                    PID:1260
                                • C:\Windows\System32\net.exe
                                  "C:\Windows\System32\net.exe" stop "samss" /y
                                  2⤵
                                  • Suspicious use of WriteProcessMemory
                                  PID:2828
                                  • C:\Windows\system32\net1.exe
                                    C:\Windows\system32\net1 stop "samss" /y
                                    3⤵
                                      PID:1780
                                  • 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\a02107e2dc63a86777f46ed7d3c18ef4485eac83cb14ca1a0fca2f4d80e815cd.exe" /f
                                    2⤵
                                    • Suspicious use of WriteProcessMemory
                                    PID:4844
                                    • 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\a02107e2dc63a86777f46ed7d3c18ef4485eac83cb14ca1a0fca2f4d80e815cd.exe" /f
                                      3⤵
                                      • Adds Run key to start application
                                      PID:5864
                                  • C:\Windows\System32\net.exe
                                    "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
                                    2⤵
                                    • Suspicious use of WriteProcessMemory
                                    PID:4852
                                    • C:\Windows\system32\net1.exe
                                      C:\Windows\system32\net1 stop "audioendpointbuilder" /y
                                      3⤵
                                        PID:5588
                                    • C:\Windows\System32\net.exe
                                      "C:\Windows\System32\net.exe" stop "samss" /y
                                      2⤵
                                      • Suspicious use of WriteProcessMemory
                                      PID:5196
                                      • C:\Windows\system32\net1.exe
                                        C:\Windows\system32\net1 stop "samss" /y
                                        3⤵
                                          PID:5612
                                    • C:\Windows\system32\WerFault.exe
                                      C:\Windows\system32\WerFault.exe -pss -s 428 -p 2744 -ip 2744
                                      1⤵
                                        PID:4804
                                      • C:\Windows\system32\WerFault.exe
                                        C:\Windows\system32\WerFault.exe -pss -s 456 -p 2904 -ip 2904
                                        1⤵
                                          PID:4812

                                        Network

                                        MITRE ATT&CK Enterprise v6

                                        Replay Monitor

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                                        Downloads

                                        • memory/2228-132-0x00007FF6B4F60000-0x00007FF6B50D5000-memory.dmp

                                          Filesize

                                          1.5MB

                                          Download

                                        • memory/2744-195-0x00000265DB370000-0x00000265DB378000-memory.dmp

                                          Filesize

                                          32KB

                                          Download

                                        • memory/2744-196-0x00000265DAEF0000-0x00000265DAEF1000-memory.dmp

                                          Filesize

                                          4KB

                                          Download

                                        • memory/2744-197-0x00000265DB1F0000-0x00000265DB1F8000-memory.dmp

                                          Filesize

                                          32KB

                                          Download

                                        • memory/2744-198-0x00000265DB040000-0x00000265DB041000-memory.dmp

                                          Filesize

                                          4KB

                                          Download