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Analysis

  • max time kernel
    1791s
  • max time network
    1813s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    25-05-2021 05:31

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 LanmanServer
    1⤵
      PID:2416
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s WpnService
      1⤵
        PID:2708
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
        1⤵
          PID:2696
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s Browser
          1⤵
            PID:2580
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
            1⤵
              PID:2448
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
              1⤵
                PID:1936
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s SENS
                1⤵
                  PID:1408
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                  1⤵
                    PID:1396
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s Themes
                    1⤵
                      PID:1144
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                      1⤵
                        PID:1092
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                        1⤵
                          PID:1036
                        • 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-4d.exe
                            "C:\Users\Admin\AppData\Local\Temp\keygen-step-4d.exe"
                            1⤵
                            • Suspicious use of WriteProcessMemory
                            PID:808
                            • 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:1012
                              • 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:3440
                            • 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:3248
                              • C:\Windows\system32\WerFault.exe
                                C:\Windows\system32\WerFault.exe -u -p 3248 -s 1352
                                3⤵
                                • Program crash
                                • Suspicious behavior: EnumeratesProcesses
                                • Suspicious use of AdjustPrivilegeToken
                                PID:640
                          • \??\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:1464
                            • C:\Windows\system32\svchost.exe
                              C:\Windows\system32\svchost.exe -k SystemNetworkService
                              2⤵
                              • Modifies registry class
                              PID:2884

                          Network

                          MITRE ATT&CK Enterprise v6

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          • memory/340-177-0x000001B51D090000-0x000001B51D100000-memory.dmp

                            Filesize

                            448KB

                          • memory/1036-149-0x00000247F60A0000-0x00000247F6110000-memory.dmp

                            Filesize

                            448KB

                          • memory/1092-189-0x000001442DBD0000-0x000001442DC40000-memory.dmp

                            Filesize

                            448KB

                          • memory/1144-166-0x00000194BEDC0000-0x00000194BEE30000-memory.dmp

                            Filesize

                            448KB

                          • memory/1396-172-0x000001DE69B60000-0x000001DE69BD0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1408-152-0x000001B3FED60000-0x000001B3FEDAB000-memory.dmp

                            Filesize

                            300KB

                          • memory/1408-155-0x000001B3FEE20000-0x000001B3FEE90000-memory.dmp

                            Filesize

                            448KB

                          • memory/1464-156-0x0000024F06660000-0x0000024F066D0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1936-161-0x0000021991E90000-0x0000021991F00000-memory.dmp

                            Filesize

                            448KB

                          • memory/2416-187-0x00000223B0A00000-0x00000223B0A70000-memory.dmp

                            Filesize

                            448KB

                          • memory/2448-183-0x000002D38C340000-0x000002D38C3B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2580-167-0x000001ECF73A0000-0x000001ECF7410000-memory.dmp

                            Filesize

                            448KB

                          • memory/2696-179-0x0000022B03D00000-0x0000022B03D70000-memory.dmp

                            Filesize

                            448KB

                          • memory/2708-186-0x0000022088420000-0x0000022088490000-memory.dmp

                            Filesize

                            448KB

                          • memory/2884-173-0x000001AE727B0000-0x000001AE72820000-memory.dmp

                            Filesize

                            448KB

                          • memory/3248-126-0x00000000003B0000-0x00000000003B1000-memory.dmp

                            Filesize

                            4KB

                          • memory/3248-178-0x000000001B130000-0x000000001B132000-memory.dmp

                            Filesize

                            8KB

                          • memory/3248-138-0x0000000000B00000-0x0000000000B01000-memory.dmp

                            Filesize

                            4KB

                          • memory/3248-134-0x0000000000AD0000-0x0000000000AEC000-memory.dmp

                            Filesize

                            112KB

                          • memory/3248-129-0x0000000000AC0000-0x0000000000AC1000-memory.dmp

                            Filesize

                            4KB

                          • memory/3440-150-0x0000000000CE0000-0x0000000000D3C000-memory.dmp

                            Filesize

                            368KB

                          • memory/3440-148-0x0000000000ABE000-0x0000000000BBF000-memory.dmp

                            Filesize

                            1.0MB