Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20220331-en
  • submitted
    08/04/2022, 12:10

General

  • Target

    dbac4f2fffcb4e09aad772895647e8f161b1ac713592fe47c5e8207c85722f13.exe

  • Size

    669KB

  • MD5

    3a43bb428e23e8059c9a3fbde9707de2

  • SHA1

    edbca9b297c2ce981bcb6c8a20107c204045d523

  • SHA256

    dbac4f2fffcb4e09aad772895647e8f161b1ac713592fe47c5e8207c85722f13

  • SHA512

    c02648de56128a758873952ffcac982bf4463bc9c7cab9605e2f0cf77eb4304e39a9076494f4127718356e4d5250084353b27459c40ae8f30ac7cb5150f2ae1e

Malware Config

Extracted

Path

C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\HOW_TO_RECOVER_DATA.html

Ransom Note
<html> <style type="text/css"> body { background-color: #f5f5f5; } h1, h3{ text-align: center; text-transform: uppercase; font-weight: normal; } /*---*/ .tabs1{ display: block; margin: auto; } .tabs1 .head{ text-align: center; float: top; padding: 0px; text-transform: uppercase; font-weight: normal; display: block; background: #81bef7; color: #DF0101; font-size: 30px; } .tabs1 .identi { font-size: 10px; text-align: center; float: top; padding: 15px; display: block; background: #81bef7; color: #DFDFDF; } .tabs .content { background: #f5f5f5; /*text-align: center;*/ color: #000000; padding: 25px 15px; font-size: 15px; font-weight: 400; line-height: 20px; } .tabs .content a { color: #df0130; font-size: 23px; font-style: italic; text-decoration: none; line-height: 35px; } .tabs .content .text{ padding: 25px; line-height: 1.2; } </style> <body> <div class="tabs1"> <div class="head" ><b>Your personal ID:</b></div> <div class="identi"> <span style="width:1000px; color: #ffffff; font-size: 10px;">DF8C4B09D45070991827C09EE32817CCAFED6DF84279DBA816EF1F150D11C893CDC37F7AE1DA89C15E2A0C349A5D037625A83E0015C0AF2A451604AFA77118C1<br>9440AAD292C43791E20138755BBA177C02EDE8A6CB38FDA418EBC4BEF0F2CA4F4F9C873B91A2C1616D9CC66C5C1EC8A07E28814CE07CFCD73B64BB58770F<br>6B54DD0C9A10B8F6FB6265E2E4E8243C224DE67A77BCC354DD0C0CD1C3B9FFF2D1702778FA2613405CE1F53B99E558DA97557A832FB1D476DD7BE330E757<br>ABFCADB47415AB52552ABBA384D456F7946A2D230AEBEE4D7746417C2C1F1E21323ACDCD95E1FFBAD3BAE4894931E21C9F0208410CE6E3ED03DE72C7F721<br>20EFC25B2519BE6671795799BB2C5CE943D0169F32524324CC0B363B5CEE1337D7294CD7D7AD0986BEDC6A0606136D41F8A4F7D1307A5BD896BDC7712A2D<br>B8847FBF31A80584450606D732B837D3D23532180B40E11BDEEFD62BB65B7AAE5F8F09E29211592186BF396A8CA9007E00913A0C5AF379712EADA71C7D75<br>6C27C00DE728847F832AB4793A9F0718061E1F56D94DF0C429B84595F4E9B4AC9E7E0219084B649607C3DC81B147A29421F1AFFDA862DFED4A1D1181A536<br>40A45F6836155A5A49A8892BE621F535B56466AA377D5FB7E8F90ECF55E9C175039C7C7E35B7DA40AE0261FCE2E0B039449BCE30EE00B23DE7EAAA1EFF39<br>A2181E189D6BAEC2F75A724D9836</span> <br> <!-- !!! dont changing this !!! --> </div> </div> <!-- --> <div class="tabs"> <!--tab--> <div class="tab"> <div id="tab-content1" class="content"> <div class="text"> <!--text data --> <b>/!\ YOUR COMPANY NETWORK HAS BEEN PENETRATED /!\</b><br> <b>All your important files have been encrypted!</b><br><br> <hr> Your files are safe! Only modified. (RSA+AES)<br><br> ANY ATTEMPT TO RESTORE YOUR FILES WITH THIRD-PARTY SOFTWARE<br> WILL PERMANENTLY CORRUPT IT.<br> DO NOT MODIFY ENCRYPTED FILES.<br> DO NOT RENAME ENCRYPTED FILES.<br><br> No software available on internet can help you. We are the only ones able to<br> solve your problem.<br><br> We gathered highly confidential/personal data. These data are currently stored on<br> a private server. This server will be immediately destroyed after your payment.<br> If you decide to not pay, we will release your data to public or re-seller.<br> So you can expect your data to be publicly available in the near future..<br><br> We only seek money and our goal is not to damage your reputation or prevent<br> your business from running.<br><br> You will can send us 2-3 non-important files and we will decrypt it for free<br> to prove we are able to give your files back.<br><br> <!--text data --> <hr> <b>Contact us for price and get decryption software.</b><br><br> <a>qd7pcafncosqfqu3ha6fcx4h6sr7tzwagzpcdcnytiw3b6varaeqv5yd.onion</a><br> * Note that this server is available via Tor browser only<br><br> Follow the instructions to open the link:<br> 1. Type the addres "https://www.torproject.org" in your Internet browser. It opens the Tor site.<br> 2. Press "Download Tor", then press "Download Tor Browser Bundle", install and run it.<br> 3. Now you have Tor browser. In the Tor Browser open <a>qd7pcafncosqfqu3ha6fcx4h6sr7tzwagzpcdcnytiw3b6varaeqv5yd.onion<br> </a> 4. Start a chat and follow the further instructions. <br> <hr> <b>If you can not use the above link, use the email:</b><br> <a href="[email protected] ">[email protected] </a> <br> <a href="[email protected] ">[email protected] </a> <br> <p>* To contact us, create a new free email account on the site: <a href="https://protonmail.com">protonmail.com <br> <b> IF YOU DON'T CONTACT US WITHIN 72 HOURS, PRICE WILL BE HIGHER.</b><br> </div> </div> </div> <!--tab--> <!--text data --> </div> </div> <!--tab--> </div> </div> </body> </html>

Signatures

  • MedusaLocker

    Ransomware with several variants first seen in September 2019.

  • MedusaLocker Payload 2 IoCs
  • UAC bypass 3 TTPs
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Executes dropped EXE 1 IoCs
  • Modifies extensions of user files 15 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Drops desktop.ini file(s) 1 IoCs
  • Enumerates connected drives 3 TTPs 24 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Enumerates physical storage devices 1 TTPs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Interacts with shadow copies 2 TTPs 3 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 63 IoCs
  • Suspicious use of FindShellTrayWindow 35 IoCs
  • Suspicious use of SendNotifyMessage 32 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • System policy modification 1 TTPs 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\dbac4f2fffcb4e09aad772895647e8f161b1ac713592fe47c5e8207c85722f13.exe
    "C:\Users\Admin\AppData\Local\Temp\dbac4f2fffcb4e09aad772895647e8f161b1ac713592fe47c5e8207c85722f13.exe"
    1⤵
    • Modifies extensions of user files
    • Checks whether UAC is enabled
    • Drops desktop.ini file(s)
    • Enumerates connected drives
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:1320
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:1224
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:780
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:452
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:756
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:1016
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1716
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:956
  • C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe"
    1⤵
    • Enumerates system info in registry
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1328
    • C:\Program Files\Google\Chrome\Application\chrome.exe
      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=89.0.4389.114 --initial-client-data=0xc0,0xc4,0xc8,0x94,0xcc,0x7fef6714f50,0x7fef6714f60,0x7fef6714f70
      2⤵
        PID:1296
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --gpu-preferences=SAAAAAAAAADgAAAwAAAAAAAAAAAAAAAAAABgAAAAAAAoAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAB4AAAAAAAAAHgAAAAAAAAAKAAAAAQAAAAgAAAAAAAAACgAAAAAAAAAMAAAAAAAAAA4AAAAAAAAABAAAAAAAAAAAAAAAAUAAAAQAAAAAAAAAAAAAAAGAAAAEAAAAAAAAAABAAAABQAAABAAAAAAAAAAAQAAAAYAAAAIAAAAAAAAAAgAAAAAAAAA --mojo-platform-channel-handle=1112 /prefetch:2
        2⤵
          PID:468
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --lang=en-US --service-sandbox-type=network --mojo-platform-channel-handle=1328 /prefetch:8
          2⤵
            PID:588
          • C:\Program Files\Google\Chrome\Application\chrome.exe
            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=1836 /prefetch:8
            2⤵
              PID:532
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --lang=en-US --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=6 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=2080 /prefetch:1
              2⤵
                PID:932
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --lang=en-US --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=2092 /prefetch:1
                2⤵
                  PID:1392
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2848 /prefetch:8
                  2⤵
                    PID:1388
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --gpu-preferences=SAAAAAAAAADgAAAwAAAAAAAAAAAAAAAAAABgAAAAAAAoAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAB4AAAAAAAAAHgAAAAAAAAAKAAAAAQAAAAgAAAAAAAAACgAAAAAAAAAMAAAAAAAAAA4AAAAAAAAABAAAAAAAAAAAAAAAAUAAAAQAAAAAAAAAAAAAAAGAAAAEAAAAAAAAAABAAAABQAAABAAAAAAAAAAAQAAAAYAAAAIAAAAAAAAAAgAAAAAAAAA --use-gl=swiftshader-webgl --mojo-platform-channel-handle=3352 /prefetch:2
                    2⤵
                      PID:2084
                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=9 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=2452 /prefetch:1
                      2⤵
                        PID:2128
                      • C:\Program Files\Google\Chrome\Application\chrome.exe
                        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=3584 /prefetch:8
                        2⤵
                          PID:2192
                        • C:\Program Files\Google\Chrome\Application\chrome.exe
                          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=3676 /prefetch:8
                          2⤵
                            PID:2200
                          • C:\Program Files\Google\Chrome\Application\chrome.exe
                            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=1492 /prefetch:8
                            2⤵
                              PID:2372
                            • C:\Program Files\Google\Chrome\Application\chrome.exe
                              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=1700 /prefetch:8
                              2⤵
                                PID:2440
                              • C:\Program Files\Google\Chrome\Application\chrome.exe
                                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=3332 /prefetch:8
                                2⤵
                                  PID:2448
                                • C:\Program Files\Google\Chrome\Application\chrome.exe
                                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=3784 /prefetch:8
                                  2⤵
                                    PID:2528
                                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=16 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3656 /prefetch:1
                                    2⤵
                                      PID:2580
                                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=3168 /prefetch:8
                                      2⤵
                                        PID:2592
                                      • C:\Program Files\Google\Chrome\Application\chrome.exe
                                        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=3824 /prefetch:8
                                        2⤵
                                          PID:2716
                                        • C:\Program Files\Google\Chrome\Application\chrome.exe
                                          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=3032 /prefetch:8
                                          2⤵
                                            PID:2728
                                          • C:\Program Files\Google\Chrome\Application\chrome.exe
                                            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2908 /prefetch:8
                                            2⤵
                                              PID:2736
                                            • C:\Program Files\Google\Chrome\Application\chrome.exe
                                              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=3996 /prefetch:8
                                              2⤵
                                                PID:2832
                                              • C:\Program Files\Google\Chrome\Application\chrome.exe
                                                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=4012 /prefetch:8
                                                2⤵
                                                  PID:2840
                                                • C:\Program Files\Google\Chrome\Application\chrome.exe
                                                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --field-trial-handle=1100,15082943322525892318,1635383117771064498,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=4000 /prefetch:8
                                                  2⤵
                                                    PID:2908
                                                • C:\Windows\system32\taskeng.exe
                                                  taskeng.exe {FB6B356A-80D0-4DA9-9182-98519E66EAFC} S-1-5-21-594401021-1341801952-2355885667-1000:KORIIBGY\Admin:Interactive:[1]
                                                  1⤵
                                                    PID:2280
                                                    • C:\Users\Admin\AppData\Roaming\svhost.exe
                                                      C:\Users\Admin\AppData\Roaming\svhost.exe
                                                      2⤵
                                                      • Executes dropped EXE
                                                      PID:2312

                                                  Network

                                                  MITRE ATT&CK Enterprise v6

                                                  Replay Monitor

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                                                  Downloads

                                                  • C:\Users\Admin\AppData\Roaming\svhost.exe

                                                    Filesize

                                                    669KB

                                                    MD5

                                                    3a43bb428e23e8059c9a3fbde9707de2

                                                    SHA1

                                                    edbca9b297c2ce981bcb6c8a20107c204045d523

                                                    SHA256

                                                    dbac4f2fffcb4e09aad772895647e8f161b1ac713592fe47c5e8207c85722f13

                                                    SHA512

                                                    c02648de56128a758873952ffcac982bf4463bc9c7cab9605e2f0cf77eb4304e39a9076494f4127718356e4d5250084353b27459c40ae8f30ac7cb5150f2ae1e

                                                  • C:\Users\Admin\AppData\Roaming\svhost.exe

                                                    Filesize

                                                    669KB

                                                    MD5

                                                    3a43bb428e23e8059c9a3fbde9707de2

                                                    SHA1

                                                    edbca9b297c2ce981bcb6c8a20107c204045d523

                                                    SHA256

                                                    dbac4f2fffcb4e09aad772895647e8f161b1ac713592fe47c5e8207c85722f13

                                                    SHA512

                                                    c02648de56128a758873952ffcac982bf4463bc9c7cab9605e2f0cf77eb4304e39a9076494f4127718356e4d5250084353b27459c40ae8f30ac7cb5150f2ae1e

                                                  • memory/1320-54-0x0000000076071000-0x0000000076073000-memory.dmp

                                                    Filesize

                                                    8KB