Analysis

  • max time kernel
    1102s
  • max time network
    1112s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    19-06-2024 22:02

General

  • Target

    Krotten Ransomware.zip

  • Size

    26KB

  • MD5

    ebb597a9b4761880fcf85714fca1c199

  • SHA1

    d9cd11546400a9cac250f8df096d956e56e7acb3

  • SHA256

    c2da6da5c0d092b3ba482b871ec5f5007bd3eb18be33ada4c733a1f894f0b573

  • SHA512

    137944f3fe233f951270a29d0d0115435ab617833cdd7d0d5d1c4d20cb40e9ab8758136389013285efdc4ee6c7fc3457968a1325ba683ae99aa3d00b57008084

  • SSDEEP

    768:L4FcZqc0pCe0zLMai34tqet7TPwqSyI8NsdFe:sm4wvzL2MvTwq6BdFe

Score
8/10

Malware Config

Signatures

  • Disables RegEdit via registry modification 2 IoCs
  • Disables Task Manager via registry modification
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
  • Modifies Internet Explorer start page 1 TTPs 2 IoCs
  • Modifies data under HKEY_USERS 2 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 45 IoCs
  • Suspicious use of FindShellTrayWindow 27 IoCs
  • Suspicious use of SendNotifyMessage 12 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Windows\Explorer.exe
    C:\Windows\Explorer.exe /idlist,,"C:\Users\Admin\AppData\Local\Temp\Krotten Ransomware.zip"
    1⤵
      PID:1016
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:4608
      • C:\Users\Admin\Desktop\Trojan;Win32.Krotten.B.exe
        "C:\Users\Admin\Desktop\Trojan;Win32.Krotten.B.exe"
        1⤵
        • Disables RegEdit via registry modification
        • Adds Run key to start application
        • Drops file in Windows directory
        • Modifies Internet Explorer settings
        • Modifies Internet Explorer start page
        • Modifies registry class
        • Suspicious use of AdjustPrivilegeToken
        PID:1220
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe"
        1⤵
        • Enumerates system info in registry
        • Modifies data under HKEY_USERS
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of WriteProcessMemory
        PID:1656
        • 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=110.0.5481.104 --initial-client-data=0x100,0x104,0x108,0xdc,0x10c,0x7ffff651ab58,0x7ffff651ab68,0x7ffff651ab78
          2⤵
            PID:424
          • C:\Program Files\Google\Chrome\Application\chrome.exe
            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=1660 --field-trial-handle=1736,i,3386479210045540524,4711546250691681374,131072 /prefetch:2
            2⤵
              PID:3880
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2112 --field-trial-handle=1736,i,3386479210045540524,4711546250691681374,131072 /prefetch:8
              2⤵
                PID:2952
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=2172 --field-trial-handle=1736,i,3386479210045540524,4711546250691681374,131072 /prefetch:8
                2⤵
                  PID:4084
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --first-renderer-process --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --mojo-platform-channel-handle=3048 --field-trial-handle=1736,i,3386479210045540524,4711546250691681374,131072 /prefetch:1
                  2⤵
                    PID:4848
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=3080 --field-trial-handle=1736,i,3386479210045540524,4711546250691681374,131072 /prefetch:1
                    2⤵
                      PID:1996
                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --mojo-platform-channel-handle=4204 --field-trial-handle=1736,i,3386479210045540524,4711546250691681374,131072 /prefetch:1
                      2⤵
                        PID:4224
                      • C:\Program Files\Google\Chrome\Application\chrome.exe
                        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.ProcessorMetrics --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=4544 --field-trial-handle=1736,i,3386479210045540524,4711546250691681374,131072 /prefetch:8
                        2⤵
                          PID:1068
                        • C:\Program Files\Google\Chrome\Application\chrome.exe
                          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=4540 --field-trial-handle=1736,i,3386479210045540524,4711546250691681374,131072 /prefetch:8
                          2⤵
                            PID:2968
                          • C:\Program Files\Google\Chrome\Application\110.0.5481.104\Installer\setup.exe
                            "C:\Program Files\Google\Chrome\Application\110.0.5481.104\Installer\setup.exe" --reenable-autoupdates --system-level
                            2⤵
                              PID:1152
                              • C:\Program Files\Google\Chrome\Application\110.0.5481.104\Installer\setup.exe
                                "C:\Program Files\Google\Chrome\Application\110.0.5481.104\Installer\setup.exe" --type=crashpad-handler /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler --database=C:\Windows\TEMP\Crashpad --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=110.0.5481.104 --initial-client-data=0x25c,0x260,0x264,0x238,0x268,0x7ff7027aae48,0x7ff7027aae58,0x7ff7027aae68
                                3⤵
                                  PID:3380
                            • C:\Program Files\Google\Chrome\Application\110.0.5481.104\elevation_service.exe
                              "C:\Program Files\Google\Chrome\Application\110.0.5481.104\elevation_service.exe"
                              1⤵
                                PID:2648

                              Network

                              MITRE ATT&CK Enterprise v15

                              Replay Monitor

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                              Downloads

                              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\Network Persistent State

                                Filesize

                                809B

                                MD5

                                139bd4dca641ca047fa9c212d7dd0272

                                SHA1

                                b2ca7688927d4beb099372a9817eeb1599a2a33e

                                SHA256

                                4e874831da4a0d0aaffbe6191ec3e8e5e325da7aa53adf501b934c1c2e81368c

                                SHA512

                                ebffb8979da7845d2db1d066d43fef12f18f6789b0a4deceb85e97ce45200ea8af5512eb6aed08f3a6f0acf662abf66af21d04b341703bd99d0347b247843256

                              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\SCT Auditing Pending Reports

                                Filesize

                                2B

                                MD5

                                d751713988987e9331980363e24189ce

                                SHA1

                                97d170e1550eee4afc0af065b78cda302a97674c

                                SHA256

                                4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945

                                SHA512

                                b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

                              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences

                                Filesize

                                7KB

                                MD5

                                d893c1845af41340781e33c467744cf6

                                SHA1

                                292f73cfe7e503d8902bb5b2600ab2ba7c21ccfd

                                SHA256

                                78311f871fb4830e850f712455155d58074a4b6762c4e2510c50f43dbd1391b0

                                SHA512

                                0df0be008ba383344dd02e0b649d84917ba295b0290ea1945f8b8f619db1de8c90348671059b30b747d89c9c83e223c94d2c8207d6ae9051c63a13906c27a6a6

                              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State

                                Filesize

                                129KB

                                MD5

                                e39d3e6ba7b9652731d3de76526896c4

                                SHA1

                                90c97e6576d84e494d78035eb9d9fd5056f7a590

                                SHA256

                                aee1782d81240bb50df0dceb169848abb27e4f3085bc99527a355e2b78138deb

                                SHA512

                                710df56508db3fd487125079c237ebf60f0e8fc6630ee4824290d085712be4e26510e28ff675b8dd2c26edd359a443013a32a986b1fd63970443df1c5213c3c9

                              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State

                                Filesize

                                129KB

                                MD5

                                4fb14f8838db0e34c6be357d8fd2b38f

                                SHA1

                                642f9313f10281aae6a8cec2372ea44137844097

                                SHA256

                                19702f953fc9b7a86c1c916fd50441a1aaf69a1eba36ca8a8a90b8cb42047b25

                                SHA512

                                52b9833d393a3ca8aab6adc332dc42d3e7a2e986a1be17d56cc5dba53aa12c7bde7caf300ed80426a8b3a9b632ea14f414be176581ecdd6eb1601bf2cb30fc2a

                              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\ShaderCache\data_1

                                Filesize

                                264KB

                                MD5

                                f50f89a0a91564d0b8a211f8921aa7de

                                SHA1

                                112403a17dd69d5b9018b8cede023cb3b54eab7d

                                SHA256

                                b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec

                                SHA512

                                bf8cda48cf1ec4e73f0dd1d4fa5562af1836120214edb74957430cd3e4a2783e801fa3f4ed2afb375257caeed4abe958265237d6e0aacf35a9ede7a2e8898d58