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Analysis

  • max time kernel
    1793s
  • max time network
    1800s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    17-05-2021 11:08

General

  • Target

    keygen-step-4d.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 Themes
    1⤵
      PID:1184
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s SENS
      1⤵
        PID:1412
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s UserManager
        1⤵
          PID:1364
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
          1⤵
            PID:1852
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
            1⤵
              PID:2564
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
              1⤵
                PID:2488
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
                1⤵
                  PID:2736
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s Browser
                  1⤵
                    PID:2856
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s WpnService
                    1⤵
                      PID:2748
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                      1⤵
                        PID:1052
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                        1⤵
                          PID:912
                        • c:\windows\system32\svchost.exe
                          c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                          1⤵
                            PID:1020
                          • 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:4656
                            • 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:3688
                              • 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:4220
                            • 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:4252
                              • C:\Windows\system32\WerFault.exe
                                C:\Windows\system32\WerFault.exe -u -p 4252 -s 1308
                                3⤵
                                • Program crash
                                • Suspicious behavior: EnumeratesProcesses
                                • Suspicious use of AdjustPrivilegeToken
                                PID:4448
                          • \??\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:4704
                            • C:\Windows\system32\svchost.exe
                              C:\Windows\system32\svchost.exe -k SystemNetworkService
                              2⤵
                              • Modifies registry class
                              PID:2660

                          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/912-147-0x000001E643AC0000-0x000001E643AC2000-memory.dmp

                            Filesize

                            8KB

                          • memory/912-185-0x000001E643CD0000-0x000001E643D40000-memory.dmp

                            Filesize

                            448KB

                          • memory/1020-177-0x00000208E1380000-0x00000208E13F0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1052-183-0x000001D274080000-0x000001D2740F0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1184-156-0x000001B755340000-0x000001B7553B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1364-159-0x000001AF916A0000-0x000001AF916EB000-memory.dmp

                            Filesize

                            300KB

                          • memory/1364-163-0x000001AF91C10000-0x000001AF91C80000-memory.dmp

                            Filesize

                            448KB

                          • memory/1412-187-0x00000207142A0000-0x0000020714310000-memory.dmp

                            Filesize

                            448KB

                          • memory/1852-189-0x0000018641290000-0x0000018641300000-memory.dmp

                            Filesize

                            448KB

                          • memory/2488-181-0x0000020F53140000-0x0000020F531B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2564-179-0x000002167E0A0000-0x000002167E110000-memory.dmp

                            Filesize

                            448KB

                          • memory/2660-133-0x00007FF69C814060-mapping.dmp

                          • memory/2660-174-0x0000024386540000-0x00000243865B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2736-169-0x0000020851A30000-0x0000020851AA0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2748-175-0x000002E17D000000-0x000002E17D070000-memory.dmp

                            Filesize

                            448KB

                          • memory/2856-170-0x0000028DDA600000-0x0000028DDA670000-memory.dmp

                            Filesize

                            448KB

                          • memory/3688-116-0x0000000000000000-mapping.dmp

                          • memory/4220-155-0x0000000004560000-0x00000000045BC000-memory.dmp

                            Filesize

                            368KB

                          • memory/4220-153-0x0000000004380000-0x0000000004481000-memory.dmp

                            Filesize

                            1.0MB

                          • memory/4220-119-0x0000000000000000-mapping.dmp

                          • memory/4252-157-0x000000001B0C0000-0x000000001B0C2000-memory.dmp

                            Filesize

                            8KB

                          • memory/4252-130-0x0000000000D50000-0x0000000000D51000-memory.dmp

                            Filesize

                            4KB

                          • memory/4252-129-0x0000000000D80000-0x0000000000D9C000-memory.dmp

                            Filesize

                            112KB

                          • memory/4252-128-0x0000000000D40000-0x0000000000D41000-memory.dmp

                            Filesize

                            4KB

                          • memory/4252-126-0x0000000000640000-0x0000000000641000-memory.dmp

                            Filesize

                            4KB

                          • memory/4252-121-0x0000000000000000-mapping.dmp

                          • memory/4704-162-0x00000237BE660000-0x00000237BE6D0000-memory.dmp

                            Filesize

                            448KB