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Analysis

  • max time kernel
    1799s
  • max time network
    1806s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    18-05-2021 11:31

General

  • Target

    keygen-step-4.exe

  • Size

    4.6MB

  • MD5

    563107b1df2a00f4ec868acd9e08a205

  • SHA1

    9cb9c91d66292f5317aa50d92e38834861e9c9b7

  • SHA256

    bf2bd257dde4921ce83c7c1303fafe7f9f81e53c2775d3c373ced482b22eb8a9

  • SHA512

    99a8d247fa435c4cd95be7bc64c7dd6e382371f3a3c160aac3995fd705e4fd3f6622c23784a4ae3457c87536347d15eda3f08aa616450778a99376df540d74d1

Score
8/10

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Modifies data under HKEY_USERS 1 IoCs
  • Modifies registry class 8 IoCs
  • Suspicious behavior: EnumeratesProcesses 21 IoCs
  • Suspicious use of AdjustPrivilegeToken 16 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
    1⤵
      PID:2700
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s Browser
      1⤵
        PID:2740
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s WpnService
        1⤵
          PID:2724
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
          1⤵
            PID:2544
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
            1⤵
              PID:2464
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
              1⤵
                PID:1992
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s SENS
                1⤵
                  PID:1440
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                  1⤵
                    PID:1296
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s Themes
                    1⤵
                      PID:1224
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                      1⤵
                        PID:1108
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                        1⤵
                          PID:1064
                        • c:\windows\system32\svchost.exe
                          c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                          1⤵
                            PID:340
                          • C:\Users\Admin\AppData\Local\Temp\keygen-step-4.exe
                            "C:\Users\Admin\AppData\Local\Temp\keygen-step-4.exe"
                            1⤵
                            • Suspicious use of WriteProcessMemory
                            PID:640
                            • C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe
                              "C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe"
                              2⤵
                              • Executes dropped EXE
                              • Drops file in Program Files directory
                              • Suspicious use of SetWindowsHookEx
                              • Suspicious use of WriteProcessMemory
                              PID:4092
                              • C:\Windows\SysWOW64\rundll32.exe
                                "C:\Windows\System32\rundll32.exe" "C:\Program Files\install.dll",install
                                3⤵
                                • Loads dropped DLL
                                • Modifies registry class
                                • Suspicious behavior: EnumeratesProcesses
                                • Suspicious use of AdjustPrivilegeToken
                                • Suspicious use of WriteProcessMemory
                                PID:2896
                            • C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe
                              "C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe"
                              2⤵
                              • Executes dropped EXE
                              • Suspicious use of AdjustPrivilegeToken
                              PID:1152
                              • C:\Windows\system32\WerFault.exe
                                C:\Windows\system32\WerFault.exe -u -p 1152 -s 1352
                                3⤵
                                • Program crash
                                • Suspicious behavior: EnumeratesProcesses
                                • Suspicious use of AdjustPrivilegeToken
                                PID:2896
                          • \??\c:\windows\system32\svchost.exe
                            c:\windows\system32\svchost.exe -k netsvcs -s BITS
                            1⤵
                            • Suspicious use of SetThreadContext
                            • Modifies data under HKEY_USERS
                            • Modifies registry class
                            • Suspicious behavior: EnumeratesProcesses
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of WriteProcessMemory
                            PID:1008
                            • C:\Windows\system32\svchost.exe
                              C:\Windows\system32\svchost.exe -k SystemNetworkService
                              2⤵
                              • Modifies registry class
                              PID:2328

                          Network

                          MITRE ATT&CK Enterprise v6

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          • C:\Program Files\install.dat

                            MD5

                            806c3221a013fec9530762750556c332

                            SHA1

                            36475bcfd0a18555d7c0413d007bbe80f7d321b5

                            SHA256

                            9bcecc5fb84d21db673c81a7ed1d10b28686b8261f79136f748ab7bbad7752f7

                            SHA512

                            56bbaafe7b0883f4e5dcff00ae69339a3b81ac8ba90b304aeab3e4e7e7523b568fd9b269241fc38a39f74894084f1f252a91c22b79cc0a16f9e135859a13145e

                          • C:\Program Files\install.dll

                            MD5

                            fe60ddbeab6e50c4f490ddf56b52057c

                            SHA1

                            6a71fdf73761a1192fd9c6961f66754a63d6db17

                            SHA256

                            9fcfa73600ff1b588015ffa20779cec6714e48ee6ae15db8766f7ffd5ee3031d

                            SHA512

                            0113b47ba1a33a2f597a26c9b66435483373cde4edb183e0e92abef8ed003743f426ba5ffe25a5807c030cc14d8a95d73aa6af95a85f44a86dd40264ecb96536

                          • C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe

                            MD5

                            3b1b318df4d314a35dce9e8fd89e5121

                            SHA1

                            55b0f8d56212a74bda0fc5f8cc0632ef52a4bc71

                            SHA256

                            4df9e7fcd10900ae5def897377f54856b0ddad1798fa22614eba56096940885b

                            SHA512

                            f04faca320d344378dd31bf05556fb3ac02873e46e2140d5858162e739f5c25bc9b32d619587c84c36b768b9193ea5292d63f62bb0b8458b35d65959b52df6b4

                          • C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe

                            MD5

                            3b1b318df4d314a35dce9e8fd89e5121

                            SHA1

                            55b0f8d56212a74bda0fc5f8cc0632ef52a4bc71

                            SHA256

                            4df9e7fcd10900ae5def897377f54856b0ddad1798fa22614eba56096940885b

                            SHA512

                            f04faca320d344378dd31bf05556fb3ac02873e46e2140d5858162e739f5c25bc9b32d619587c84c36b768b9193ea5292d63f62bb0b8458b35d65959b52df6b4

                          • C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe

                            MD5

                            e72eb3a565d7b5b83c7ff6fad519c6c9

                            SHA1

                            1a2668a26b01828eec1415aa614743abb0a4fb70

                            SHA256

                            8ff1e74643983f7ca9bca70f1bea562e805a86421defde1bd57fc0da3722f599

                            SHA512

                            71ae4db9c307c068f31a4e6471d950d1112d89d5661a4960dffbf6a7343cc313f98cfc35c5a10d38aae68be4b0a3f6a702fd5c28d938ca00094b26d0bcf03da3

                          • C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe

                            MD5

                            e72eb3a565d7b5b83c7ff6fad519c6c9

                            SHA1

                            1a2668a26b01828eec1415aa614743abb0a4fb70

                            SHA256

                            8ff1e74643983f7ca9bca70f1bea562e805a86421defde1bd57fc0da3722f599

                            SHA512

                            71ae4db9c307c068f31a4e6471d950d1112d89d5661a4960dffbf6a7343cc313f98cfc35c5a10d38aae68be4b0a3f6a702fd5c28d938ca00094b26d0bcf03da3

                          • \Program Files\install.dll

                            MD5

                            fe60ddbeab6e50c4f490ddf56b52057c

                            SHA1

                            6a71fdf73761a1192fd9c6961f66754a63d6db17

                            SHA256

                            9fcfa73600ff1b588015ffa20779cec6714e48ee6ae15db8766f7ffd5ee3031d

                            SHA512

                            0113b47ba1a33a2f597a26c9b66435483373cde4edb183e0e92abef8ed003743f426ba5ffe25a5807c030cc14d8a95d73aa6af95a85f44a86dd40264ecb96536

                          • memory/340-161-0x000001A14E380000-0x000001A14E3F0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1008-155-0x0000015BD8A50000-0x0000015BD8AC0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1008-124-0x0000015BD8870000-0x0000015BD8872000-memory.dmp

                            Filesize

                            8KB

                          • memory/1008-154-0x0000015BD86B0000-0x0000015BD86FB000-memory.dmp

                            Filesize

                            300KB

                          • memory/1064-169-0x000001E1F2B70000-0x000001E1F2BE0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1108-167-0x000001FE3EC70000-0x000001FE3ECE0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1152-188-0x0000000001210000-0x000000000122C000-memory.dmp

                            Filesize

                            112KB

                          • memory/1152-182-0x0000000000000000-mapping.dmp

                          • memory/1152-187-0x00000000011E0000-0x00000000011E1000-memory.dmp

                            Filesize

                            4KB

                          • memory/1152-189-0x00000000011F0000-0x00000000011F1000-memory.dmp

                            Filesize

                            4KB

                          • memory/1152-190-0x0000000001200000-0x0000000001202000-memory.dmp

                            Filesize

                            8KB

                          • memory/1152-185-0x0000000000CD0000-0x0000000000CD1000-memory.dmp

                            Filesize

                            4KB

                          • memory/1224-175-0x00000220C3B70000-0x00000220C3BE0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1296-177-0x0000021A3CEC0000-0x0000021A3CF30000-memory.dmp

                            Filesize

                            448KB

                          • memory/1440-171-0x0000029F58ED0000-0x0000029F58F40000-memory.dmp

                            Filesize

                            448KB

                          • memory/1440-141-0x0000029F58750000-0x0000029F58752000-memory.dmp

                            Filesize

                            8KB

                          • memory/1992-173-0x000001B4ED2B0000-0x000001B4ED320000-memory.dmp

                            Filesize

                            448KB

                          • memory/1992-143-0x000001B4ECDA0000-0x000001B4ECDA2000-memory.dmp

                            Filesize

                            8KB

                          • memory/2328-126-0x00007FF7C8764060-mapping.dmp

                          • memory/2328-160-0x0000020333970000-0x00000203339E0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2464-165-0x000001EFDC930000-0x000001EFDC9A0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2544-163-0x000001E8ED360000-0x000001E8ED3D0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2700-179-0x000001A596F10000-0x000001A596F80000-memory.dmp

                            Filesize

                            448KB

                          • memory/2724-181-0x000001C9017D0000-0x000001C901840000-memory.dmp

                            Filesize

                            448KB

                          • memory/2740-157-0x000002812EB30000-0x000002812EBA0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2896-153-0x0000000000F60000-0x0000000000FBC000-memory.dmp

                            Filesize

                            368KB

                          • memory/2896-152-0x0000000000DD9000-0x0000000000EDA000-memory.dmp

                            Filesize

                            1.0MB

                          • memory/2896-119-0x0000000000000000-mapping.dmp

                          • memory/4092-116-0x0000000000000000-mapping.dmp