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Analysis

  • max time kernel
    1801s
  • max time network
    1805s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    19-05-2021 13:58

General

  • Target

    keygen-step-4d.exe

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 gpsvc
    1⤵
      PID:296
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s SENS
      1⤵
        PID:1456
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s Themes
        1⤵
          PID:1268
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
          1⤵
            PID:1896
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
            1⤵
              PID:2332
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
              1⤵
                PID:2388
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s WpnService
                1⤵
                  PID:2684
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
                  1⤵
                    PID:2676
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s Browser
                    1⤵
                      PID:2560
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                      1⤵
                        PID:1260
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                        1⤵
                          PID:1076
                        • c:\windows\system32\svchost.exe
                          c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                          1⤵
                            PID:964
                          • C:\Users\Admin\AppData\Local\Temp\keygen-step-4d.exe
                            "C:\Users\Admin\AppData\Local\Temp\keygen-step-4d.exe"
                            1⤵
                            • Suspicious use of WriteProcessMemory
                            PID:852
                            • 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:3712
                              • 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:580
                            • 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:2840
                              • C:\Windows\system32\WerFault.exe
                                C:\Windows\system32\WerFault.exe -u -p 2840 -s 1304
                                3⤵
                                • Program crash
                                • Suspicious behavior: EnumeratesProcesses
                                • Suspicious use of AdjustPrivilegeToken
                                PID:2108
                          • \??\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:1036
                            • C:\Windows\system32\svchost.exe
                              C:\Windows\system32\svchost.exe -k SystemNetworkService
                              2⤵
                              • Modifies registry class
                              PID:2232

                          Network

                          MITRE ATT&CK Matrix ATT&CK v6

                          Discovery

                          System Information Discovery

                          1
                          T1082

                          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/296-169-0x000001D0FF320000-0x000001D0FF390000-memory.dmp
                            Filesize

                            448KB

                          • memory/580-160-0x0000000004AE1000-0x0000000004BE2000-memory.dmp
                            Filesize

                            1.0MB

                          • memory/580-119-0x0000000000000000-mapping.dmp
                          • memory/580-161-0x0000000004C50000-0x0000000004CAC000-memory.dmp
                            Filesize

                            368KB

                          • memory/964-178-0x000001FECD760000-0x000001FECD7D0000-memory.dmp
                            Filesize

                            448KB

                          • memory/1036-162-0x00000272D54A0000-0x00000272D54EB000-memory.dmp
                            Filesize

                            300KB

                          • memory/1036-163-0x00000272D5800000-0x00000272D5870000-memory.dmp
                            Filesize

                            448KB

                          • memory/1076-176-0x00000212F1670000-0x00000212F16E0000-memory.dmp
                            Filesize

                            448KB

                          • memory/1260-186-0x000001F036100000-0x000001F036170000-memory.dmp
                            Filesize

                            448KB

                          • memory/1268-184-0x000001D827F40000-0x000001D827FB0000-memory.dmp
                            Filesize

                            448KB

                          • memory/1456-180-0x0000026564990000-0x0000026564A00000-memory.dmp
                            Filesize

                            448KB

                          • memory/1896-182-0x000001EDA3640000-0x000001EDA36B0000-memory.dmp
                            Filesize

                            448KB

                          • memory/2232-168-0x0000023D804D0000-0x0000023D80540000-memory.dmp
                            Filesize

                            448KB

                          • memory/2232-130-0x00007FF63F034060-mapping.dmp
                          • memory/2332-174-0x000001A54DA40000-0x000001A54DAB0000-memory.dmp
                            Filesize

                            448KB

                          • memory/2388-172-0x0000029143240000-0x00000291432B0000-memory.dmp
                            Filesize

                            448KB

                          • memory/2560-166-0x000001B1AFE50000-0x000001B1AFEC0000-memory.dmp
                            Filesize

                            448KB

                          • memory/2676-188-0x000001A662DA0000-0x000001A662E10000-memory.dmp
                            Filesize

                            448KB

                          • memory/2684-190-0x0000022938740000-0x00000229387B0000-memory.dmp
                            Filesize

                            448KB

                          • memory/2840-120-0x0000000000000000-mapping.dmp
                          • memory/2840-171-0x0000000000A40000-0x0000000000A42000-memory.dmp
                            Filesize

                            8KB

                          • memory/2840-126-0x00000000004F0000-0x00000000004F1000-memory.dmp
                            Filesize

                            4KB

                          • memory/2840-139-0x0000000000A00000-0x0000000000A01000-memory.dmp
                            Filesize

                            4KB

                          • memory/2840-136-0x0000000000A20000-0x0000000000A3C000-memory.dmp
                            Filesize

                            112KB

                          • memory/2840-132-0x00000000009F0000-0x00000000009F1000-memory.dmp
                            Filesize

                            4KB

                          • memory/3712-116-0x0000000000000000-mapping.dmp