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Analysis

  • max time kernel
    1800s
  • max time network
    1809s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    16-05-2021 10:08

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 Browser
    1⤵
      PID:2824
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s WpnService
      1⤵
        PID:2740
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
        1⤵
          PID:2680
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
          1⤵
            PID:2404
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
            1⤵
              PID:2396
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
              1⤵
                PID:1848
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s SENS
                1⤵
                  PID:1400
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                  1⤵
                    PID:1236
                  • 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:1076
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                        1⤵
                          PID:404
                        • c:\windows\system32\svchost.exe
                          c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                          1⤵
                            PID:336
                          • 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:2988
                            • 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:2924
                              • 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:3460
                            • 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:3516
                              • C:\Windows\system32\WerFault.exe
                                C:\Windows\system32\WerFault.exe -u -p 3516 -s 1304
                                3⤵
                                • Program crash
                                • Suspicious behavior: EnumeratesProcesses
                                • Suspicious use of AdjustPrivilegeToken
                                PID:2348
                          • \??\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:804
                            • C:\Windows\system32\svchost.exe
                              C:\Windows\system32\svchost.exe -k SystemNetworkService
                              2⤵
                              • Modifies registry class
                              PID:2100

                          Network

                          MITRE ATT&CK Enterprise v6

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          • memory/336-173-0x0000028BEDC40000-0x0000028BEDCB0000-memory.dmp

                            Filesize

                            448KB

                          • memory/404-181-0x000002259D610000-0x000002259D680000-memory.dmp

                            Filesize

                            448KB

                          • memory/804-162-0x000001C771FD0000-0x000001C772040000-memory.dmp

                            Filesize

                            448KB

                          • memory/804-161-0x000001C771C40000-0x000001C771C8B000-memory.dmp

                            Filesize

                            300KB

                          • memory/1076-179-0x000001EE70440000-0x000001EE704B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1224-156-0x00000205E7E00000-0x00000205E7E02000-memory.dmp

                            Filesize

                            8KB

                          • memory/1224-187-0x00000205E8AB0000-0x00000205E8B20000-memory.dmp

                            Filesize

                            448KB

                          • memory/1236-189-0x0000022F797D0000-0x0000022F79840000-memory.dmp

                            Filesize

                            448KB

                          • memory/1236-158-0x0000022F790A0000-0x0000022F790A2000-memory.dmp

                            Filesize

                            8KB

                          • memory/1400-183-0x0000022832E00000-0x0000022832E70000-memory.dmp

                            Filesize

                            448KB

                          • memory/1848-185-0x000001DCE6240000-0x000001DCE62B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2100-172-0x000001A48BDD0000-0x000001A48BE40000-memory.dmp

                            Filesize

                            448KB

                          • memory/2396-177-0x000001288D810000-0x000001288D880000-memory.dmp

                            Filesize

                            448KB

                          • memory/2404-175-0x0000020ED7810000-0x0000020ED7880000-memory.dmp

                            Filesize

                            448KB

                          • memory/2680-163-0x000001F6BF630000-0x000001F6BF6A0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2740-168-0x0000012787130000-0x00000127871A0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2824-169-0x00000213EF3F0000-0x00000213EF460000-memory.dmp

                            Filesize

                            448KB

                          • memory/3460-133-0x00000000045F0000-0x000000000464C000-memory.dmp

                            Filesize

                            368KB

                          • memory/3460-131-0x0000000004482000-0x0000000004583000-memory.dmp

                            Filesize

                            1.0MB

                          • memory/3516-132-0x000000001B260000-0x000000001B262000-memory.dmp

                            Filesize

                            8KB

                          • memory/3516-130-0x0000000000AD0000-0x0000000000AD1000-memory.dmp

                            Filesize

                            4KB

                          • memory/3516-129-0x0000000000AB0000-0x0000000000ACC000-memory.dmp

                            Filesize

                            112KB

                          • memory/3516-128-0x0000000000AA0000-0x0000000000AA1000-memory.dmp

                            Filesize

                            4KB

                          • memory/3516-126-0x0000000000490000-0x0000000000491000-memory.dmp

                            Filesize

                            4KB