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Analysis

  • max time kernel
    1798s
  • max time network
    1799s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    18-05-2021 13:06

General

  • Target

    keygen-step-4.exe

Score
8/10

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 1 IoCs
  • Suspicious use of SetThreadContext 2 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
  • Checks processor information in registry 2 TTPs 4 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 13 IoCs
  • Modifies registry class 16 IoCs
  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 29 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs

Processes

  • 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:2804
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
        1⤵
          PID:2796
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
          1⤵
            PID:2540
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
            1⤵
              PID:2504
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
              1⤵
                PID:1964
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                1⤵
                • Modifies registry class
                PID:1376
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s SENS
                1⤵
                  PID:1352
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s Themes
                  1⤵
                    PID:1180
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                    1⤵
                      PID:1172
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                      1⤵
                        PID:344
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                        1⤵
                          PID:996
                        • 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:3224
                          • 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:2844
                            • 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:680
                          • 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:3696
                            • C:\Windows\system32\WerFault.exe
                              C:\Windows\system32\WerFault.exe -u -p 3696 -s 1576
                              3⤵
                              • Program crash
                              • Suspicious behavior: EnumeratesProcesses
                              • Suspicious use of AdjustPrivilegeToken
                              PID:4604
                        • \??\c:\windows\system32\svchost.exe
                          c:\windows\system32\svchost.exe -k netsvcs -s BITS
                          1⤵
                          • Suspicious use of SetThreadContext
                          • Modifies registry class
                          • Suspicious behavior: EnumeratesProcesses
                          • Suspicious use of AdjustPrivilegeToken
                          • Suspicious use of WriteProcessMemory
                          PID:3524
                          • C:\Windows\system32\svchost.exe
                            C:\Windows\system32\svchost.exe -k SystemNetworkService
                            2⤵
                            • Checks processor information in registry
                            • Modifies data under HKEY_USERS
                            • Modifies registry class
                            PID:3988
                          • C:\Windows\system32\svchost.exe
                            C:\Windows\system32\svchost.exe -k SystemNetworkService
                            2⤵
                            • Drops file in System32 directory
                            • Checks processor information in registry
                            • Modifies data under HKEY_USERS
                            • Modifies registry class
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of WriteProcessMemory
                            PID:4212

                        Network

                        MITRE ATT&CK Enterprise v6

                        Replay Monitor

                        Loading Replay Monitor...

                        Downloads

                        • memory/344-236-0x0000022348170000-0x00000223481E0000-memory.dmp

                          Filesize

                          448KB

                        • memory/344-156-0x0000022347B50000-0x0000022347BC0000-memory.dmp

                          Filesize

                          448KB

                        • memory/680-144-0x0000000002CF0000-0x0000000002E3A000-memory.dmp

                          Filesize

                          1.3MB

                        • memory/680-145-0x0000000004780000-0x00000000047DC000-memory.dmp

                          Filesize

                          368KB

                        • memory/996-216-0x0000028903CA0000-0x0000028903D10000-memory.dmp

                          Filesize

                          448KB

                        • memory/996-170-0x0000028903C30000-0x0000028903CA0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1172-150-0x0000020298280000-0x00000202982F0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1172-146-0x0000020298140000-0x000002029818B000-memory.dmp

                          Filesize

                          300KB

                        • memory/1172-234-0x0000020298E70000-0x0000020298EE0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1180-175-0x0000028C5D6B0000-0x0000028C5D720000-memory.dmp

                          Filesize

                          448KB

                        • memory/1180-219-0x0000028C5D720000-0x0000028C5D790000-memory.dmp

                          Filesize

                          448KB

                        • memory/1352-210-0x000001F2F2DA0000-0x000001F2F2E10000-memory.dmp

                          Filesize

                          448KB

                        • memory/1352-163-0x000001F2F2790000-0x000001F2F2800000-memory.dmp

                          Filesize

                          448KB

                        • memory/1376-223-0x00000186BEDB0000-0x00000186BEE20000-memory.dmp

                          Filesize

                          448KB

                        • memory/1376-180-0x00000186BEA00000-0x00000186BEA70000-memory.dmp

                          Filesize

                          448KB

                        • memory/1964-214-0x0000011193640000-0x00000111936B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1964-168-0x0000011193180000-0x00000111931F0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2504-224-0x000002978EB20000-0x000002978EB90000-memory.dmp

                          Filesize

                          448KB

                        • memory/2504-179-0x000002978EA40000-0x000002978EAB0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2540-185-0x0000019891D20000-0x0000019891D90000-memory.dmp

                          Filesize

                          448KB

                        • memory/2540-229-0x0000019892840000-0x00000198928B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2796-186-0x000001FE32860000-0x000001FE328D0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2796-228-0x000001FE32C80000-0x000001FE32CF0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2804-232-0x000002603B880000-0x000002603B8F0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2804-190-0x000002603B7A0000-0x000002603B810000-memory.dmp

                          Filesize

                          448KB

                        • memory/2856-160-0x00000272AB160000-0x00000272AB1D0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2856-211-0x00000272AB740000-0x00000272AB7B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/3524-198-0x000002A1DCCF0000-0x000002A1DCCF1000-memory.dmp

                          Filesize

                          4KB

                        • memory/3524-201-0x000002A1DCC10000-0x000002A1DCC14000-memory.dmp

                          Filesize

                          16KB

                        • memory/3524-197-0x000002A1DCD40000-0x000002A1DCD44000-memory.dmp

                          Filesize

                          16KB

                        • memory/3524-151-0x000002A1DD0D0000-0x000002A1DD140000-memory.dmp

                          Filesize

                          448KB

                        • memory/3524-199-0x000002A1DCCF0000-0x000002A1DCCF4000-memory.dmp

                          Filesize

                          16KB

                        • memory/3696-169-0x0000000001000000-0x0000000001002000-memory.dmp

                          Filesize

                          8KB

                        • memory/3696-137-0x0000000000E10000-0x0000000000E11000-memory.dmp

                          Filesize

                          4KB

                        • memory/3696-129-0x0000000000DF0000-0x0000000000E0C000-memory.dmp

                          Filesize

                          112KB

                        • memory/3696-128-0x0000000000DD0000-0x0000000000DD1000-memory.dmp

                          Filesize

                          4KB

                        • memory/3696-126-0x00000000008C0000-0x00000000008C1000-memory.dmp

                          Filesize

                          4KB

                        • memory/3988-162-0x000001F632470000-0x000001F6324E0000-memory.dmp

                          Filesize

                          448KB

                        • memory/4212-194-0x000002B47F530000-0x000002B47F57B000-memory.dmp

                          Filesize

                          300KB

                        • memory/4212-193-0x000002B47F610000-0x000002B47F612000-memory.dmp

                          Filesize

                          8KB

                        • memory/4212-196-0x000002B401F20000-0x000002B402025000-memory.dmp

                          Filesize

                          1.0MB

                        • memory/4212-195-0x000002B47F650000-0x000002B47F6C0000-memory.dmp

                          Filesize

                          448KB