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Analysis

  • max time kernel
    1796s
  • max time network
    1731s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    05-05-2021 12:58

General

  • Target

    keygen-step-4d.exe

Score
8/10

Malware Config

Signatures

  • Downloads MZ/PE file
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 2 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 3 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.

  • 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 16 IoCs
  • Modifies registry class 16 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 28 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 49 IoCs

Processes

  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
    1⤵
      PID:336
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s WpnService
      1⤵
        PID:2724
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
        1⤵
          PID:2664
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s Browser
          1⤵
            PID:2616
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
            1⤵
              PID:2432
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
              1⤵
                PID:2400
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
                1⤵
                  PID:1944
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s SENS
                  1⤵
                    PID:1416
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                    1⤵
                    • Modifies registry class
                    PID:1340
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s Themes
                    1⤵
                      PID:1256
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                      1⤵
                        PID:1152
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                        1⤵
                          PID:1036
                        • 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:2112
                          • 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:2716
                            • 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:752
                          • 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:3972
                          • C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe
                            "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe"
                            2⤵
                            • Executes dropped EXE
                            • Suspicious use of WriteProcessMemory
                            PID:3928
                            • C:\Users\Admin\AppData\Local\Temp\is-6QTFP.tmp\Install.tmp
                              "C:\Users\Admin\AppData\Local\Temp\is-6QTFP.tmp\Install.tmp" /SL5="$4019E,235791,152064,C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe"
                              3⤵
                              • Executes dropped EXE
                              • Loads dropped DLL
                              • Suspicious use of WriteProcessMemory
                              PID:3784
                              • C:\Users\Admin\AppData\Local\Temp\is-CA997.tmp\Ultra.exe
                                "C:\Users\Admin\AppData\Local\Temp\is-CA997.tmp\Ultra.exe" /S /UID=burnerch1
                                4⤵
                                • Executes dropped EXE
                                • Suspicious use of WriteProcessMemory
                                PID:3556
                                • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe
                                  dw20.exe -x -s 1248
                                  5⤵
                                  • Suspicious behavior: EnumeratesProcesses
                                  PID:4364
                        • \??\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:3236
                          • 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:3400
                          • 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:4188

                        Network

                        MITRE ATT&CK Enterprise v6

                        Replay Monitor

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                        Downloads

                        • memory/336-177-0x0000013CDAFD0000-0x0000013CDB040000-memory.dmp

                          Filesize

                          448KB

                        • memory/336-227-0x0000013CDB640000-0x0000013CDB6B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/752-146-0x00000000026AE000-0x00000000027AF000-memory.dmp

                          Filesize

                          1.0MB

                        • memory/752-148-0x00000000040C0000-0x000000000411C000-memory.dmp

                          Filesize

                          368KB

                        • memory/1036-150-0x000002736CA00000-0x000002736CA4B000-memory.dmp

                          Filesize

                          300KB

                        • memory/1036-235-0x000002736D310000-0x000002736D380000-memory.dmp

                          Filesize

                          448KB

                        • memory/1036-153-0x000002736CD30000-0x000002736CDA0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1152-233-0x00000161BBD20000-0x00000161BBD90000-memory.dmp

                          Filesize

                          448KB

                        • memory/1152-147-0x00000161BBC40000-0x00000161BBCB0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1256-241-0x0000025F77D30000-0x0000025F77DA0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1256-171-0x0000025F77C40000-0x0000025F77CB0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1340-176-0x000001EC08490000-0x000001EC08500000-memory.dmp

                          Filesize

                          448KB

                        • memory/1340-243-0x000001EC08F40000-0x000001EC08FB0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1416-237-0x000001E7594B0000-0x000001E759520000-memory.dmp

                          Filesize

                          448KB

                        • memory/1416-159-0x000001E759440000-0x000001E7594B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1944-165-0x000001B65A240000-0x000001B65A2B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1944-239-0x000001B65A7B0000-0x000001B65A820000-memory.dmp

                          Filesize

                          448KB

                        • memory/2400-189-0x000002695A3A0000-0x000002695A410000-memory.dmp

                          Filesize

                          448KB

                        • memory/2400-231-0x000002695A940000-0x000002695A9B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2432-229-0x00000191CCB50000-0x00000191CCBC0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2432-182-0x00000191CCA70000-0x00000191CCAE0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2616-225-0x00000174182B0000-0x0000017418320000-memory.dmp

                          Filesize

                          448KB

                        • memory/2616-164-0x0000017417D80000-0x0000017417DF0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2664-183-0x000001FF5F760000-0x000001FF5F7D0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2664-245-0x000001FF5FA00000-0x000001FF5FA70000-memory.dmp

                          Filesize

                          448KB

                        • memory/2724-188-0x000001BFD3A00000-0x000001BFD3A70000-memory.dmp

                          Filesize

                          448KB

                        • memory/2724-247-0x000001BFD3B40000-0x000001BFD3BB0000-memory.dmp

                          Filesize

                          448KB

                        • memory/3236-154-0x0000025E0FE90000-0x0000025E0FF00000-memory.dmp

                          Filesize

                          448KB

                        • memory/3400-166-0x000002E143A70000-0x000002E143AE0000-memory.dmp

                          Filesize

                          448KB

                        • memory/3556-203-0x0000000000E30000-0x0000000000E32000-memory.dmp

                          Filesize

                          8KB

                        • memory/3784-199-0x00000000001E0000-0x00000000001E1000-memory.dmp

                          Filesize

                          4KB

                        • memory/3928-193-0x0000000000400000-0x000000000042B000-memory.dmp

                          Filesize

                          172KB

                        • memory/3972-138-0x00000000014E0000-0x00000000014E1000-memory.dmp

                          Filesize

                          4KB

                        • memory/3972-133-0x00000000014C0000-0x00000000014DC000-memory.dmp

                          Filesize

                          112KB

                        • memory/3972-128-0x0000000001040000-0x0000000001041000-memory.dmp

                          Filesize

                          4KB

                        • memory/3972-126-0x0000000000C00000-0x0000000000C01000-memory.dmp

                          Filesize

                          4KB

                        • memory/3972-175-0x0000000002CB0000-0x0000000002CB2000-memory.dmp

                          Filesize

                          8KB

                        • memory/4188-208-0x000001A545440000-0x000001A5454B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/4188-207-0x000001A545130000-0x000001A54517B000-memory.dmp

                          Filesize

                          300KB

                        • memory/4188-210-0x000001A547900000-0x000001A547A01000-memory.dmp

                          Filesize

                          1.0MB