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Analysis

  • max time kernel
    296s
  • max time network
    314s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    14-05-2021 18:23

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
  • Drops file in Windows directory 1 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 2 IoCs
  • Modifies registry class 8 IoCs
  • Suspicious behavior: EnumeratesProcesses 20 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 WpnService
    1⤵
      PID:2624
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s Browser
      1⤵
        PID:2632
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
        1⤵
          PID:2616
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
          1⤵
            PID:2364
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
            1⤵
              PID:2324
            • 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:1404
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                  1⤵
                    PID:1248
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s Themes
                    1⤵
                      PID:1204
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                      1⤵
                        PID:1096
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                        1⤵
                          PID:1044
                        • c:\windows\system32\svchost.exe
                          c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                          1⤵
                            PID:64
                          • 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: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:4016
                              • 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:3728
                            • 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:3584
                              • C:\Windows\system32\WerFault.exe
                                C:\Windows\system32\WerFault.exe -u -p 3584 -s 1344
                                3⤵
                                • Program crash
                                • Suspicious behavior: EnumeratesProcesses
                                • Suspicious use of AdjustPrivilegeToken
                                PID:3300
                          • \??\c:\windows\system32\svchost.exe
                            c:\windows\system32\svchost.exe -k netsvcs -s BITS
                            1⤵
                            • Suspicious use of SetThreadContext
                            • Drops file in Windows directory
                            • Modifies data under HKEY_USERS
                            • Modifies registry class
                            • Suspicious behavior: EnumeratesProcesses
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of WriteProcessMemory
                            PID:1180
                            • C:\Windows\system32\svchost.exe
                              C:\Windows\system32\svchost.exe -k SystemNetworkService
                              2⤵
                              • Modifies registry class
                              PID:2776

                          Network

                          MITRE ATT&CK Enterprise v6

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          • memory/64-149-0x0000027322C00000-0x0000027322C70000-memory.dmp

                            Filesize

                            448KB

                          • memory/1044-180-0x0000026E7ECB0000-0x0000026E7ED20000-memory.dmp

                            Filesize

                            448KB

                          • memory/1096-178-0x0000025761D60000-0x0000025761DD0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1180-132-0x00000197176F0000-0x00000197176F4000-memory.dmp

                            Filesize

                            16KB

                          • memory/1180-127-0x00000197176A0000-0x00000197176A4000-memory.dmp

                            Filesize

                            16KB

                          • memory/1180-133-0x00000197198B0000-0x0000019719920000-memory.dmp

                            Filesize

                            448KB

                          • memory/1204-186-0x00000143C1F60000-0x00000143C1FD0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1248-188-0x00000167FB370000-0x00000167FB3E0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1404-182-0x000001930B880000-0x000001930B8F0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1848-184-0x000001F5312D0000-0x000001F531340000-memory.dmp

                            Filesize

                            448KB

                          • memory/2324-176-0x000002E654120000-0x000002E654190000-memory.dmp

                            Filesize

                            448KB

                          • memory/2364-156-0x000001FF17DB0000-0x000001FF17E20000-memory.dmp

                            Filesize

                            448KB

                          • memory/2616-190-0x0000022B92270000-0x0000022B922E0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2624-192-0x0000025EC1740000-0x0000025EC17B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2632-136-0x000002F435250000-0x000002F43529B000-memory.dmp

                            Filesize

                            300KB

                          • memory/2632-144-0x000002F435380000-0x000002F4353F0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2776-146-0x000001FCD2B70000-0x000001FCD2BE0000-memory.dmp

                            Filesize

                            448KB

                          • memory/3584-153-0x0000000000A80000-0x0000000000A82000-memory.dmp

                            Filesize

                            8KB

                          • memory/3584-150-0x0000000000A70000-0x0000000000A71000-memory.dmp

                            Filesize

                            4KB

                          • memory/3584-143-0x0000000000AB0000-0x0000000000ACC000-memory.dmp

                            Filesize

                            112KB

                          • memory/3584-134-0x0000000000A60000-0x0000000000A61000-memory.dmp

                            Filesize

                            4KB

                          • memory/3584-126-0x0000000000360000-0x0000000000361000-memory.dmp

                            Filesize

                            4KB

                          • memory/3728-139-0x0000000002F30000-0x0000000002F8C000-memory.dmp

                            Filesize

                            368KB

                          • memory/3728-131-0x00000000048D8000-0x00000000049D9000-memory.dmp

                            Filesize

                            1.0MB