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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

                        • C:\Program Files\install.dat

                          MD5

                          806c3221a013fec9530762750556c332

                          SHA1

                          36475bcfd0a18555d7c0413d007bbe80f7d321b5

                          SHA256

                          9bcecc5fb84d21db673c81a7ed1d10b28686b8261f79136f748ab7bbad7752f7

                          SHA512

                          56bbaafe7b0883f4e5dcff00ae69339a3b81ac8ba90b304aeab3e4e7e7523b568fd9b269241fc38a39f74894084f1f252a91c22b79cc0a16f9e135859a13145e

                        • C:\Program Files\install.dll

                          MD5

                          fe60ddbeab6e50c4f490ddf56b52057c

                          SHA1

                          6a71fdf73761a1192fd9c6961f66754a63d6db17

                          SHA256

                          9fcfa73600ff1b588015ffa20779cec6714e48ee6ae15db8766f7ffd5ee3031d

                          SHA512

                          0113b47ba1a33a2f597a26c9b66435483373cde4edb183e0e92abef8ed003743f426ba5ffe25a5807c030cc14d8a95d73aa6af95a85f44a86dd40264ecb96536

                        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe

                          MD5

                          41a5f4fd1ea7cac4aa94a87aebccfef0

                          SHA1

                          0d0abf079413a4c773754bf4fda338dc5b9a8ddc

                          SHA256

                          97e95e99fd499ec45a7c1d8683d5731ce5e7a8fb8b710622e578cd169a00d8d9

                          SHA512

                          5ca14bda498f26efff4e1179969b8f2c25244063c7bf25f3ec20b5cd24b5be320bbfb8b3d0b2d66f5c5b415da777a766fece5f251a4247773c6cb991417fb75f

                        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe

                          MD5

                          41a5f4fd1ea7cac4aa94a87aebccfef0

                          SHA1

                          0d0abf079413a4c773754bf4fda338dc5b9a8ddc

                          SHA256

                          97e95e99fd499ec45a7c1d8683d5731ce5e7a8fb8b710622e578cd169a00d8d9

                          SHA512

                          5ca14bda498f26efff4e1179969b8f2c25244063c7bf25f3ec20b5cd24b5be320bbfb8b3d0b2d66f5c5b415da777a766fece5f251a4247773c6cb991417fb75f

                        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe

                          MD5

                          3b1b318df4d314a35dce9e8fd89e5121

                          SHA1

                          55b0f8d56212a74bda0fc5f8cc0632ef52a4bc71

                          SHA256

                          4df9e7fcd10900ae5def897377f54856b0ddad1798fa22614eba56096940885b

                          SHA512

                          f04faca320d344378dd31bf05556fb3ac02873e46e2140d5858162e739f5c25bc9b32d619587c84c36b768b9193ea5292d63f62bb0b8458b35d65959b52df6b4

                        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe

                          MD5

                          3b1b318df4d314a35dce9e8fd89e5121

                          SHA1

                          55b0f8d56212a74bda0fc5f8cc0632ef52a4bc71

                          SHA256

                          4df9e7fcd10900ae5def897377f54856b0ddad1798fa22614eba56096940885b

                          SHA512

                          f04faca320d344378dd31bf05556fb3ac02873e46e2140d5858162e739f5c25bc9b32d619587c84c36b768b9193ea5292d63f62bb0b8458b35d65959b52df6b4

                        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe

                          MD5

                          e72eb3a565d7b5b83c7ff6fad519c6c9

                          SHA1

                          1a2668a26b01828eec1415aa614743abb0a4fb70

                          SHA256

                          8ff1e74643983f7ca9bca70f1bea562e805a86421defde1bd57fc0da3722f599

                          SHA512

                          71ae4db9c307c068f31a4e6471d950d1112d89d5661a4960dffbf6a7343cc313f98cfc35c5a10d38aae68be4b0a3f6a702fd5c28d938ca00094b26d0bcf03da3

                        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe

                          MD5

                          e72eb3a565d7b5b83c7ff6fad519c6c9

                          SHA1

                          1a2668a26b01828eec1415aa614743abb0a4fb70

                          SHA256

                          8ff1e74643983f7ca9bca70f1bea562e805a86421defde1bd57fc0da3722f599

                          SHA512

                          71ae4db9c307c068f31a4e6471d950d1112d89d5661a4960dffbf6a7343cc313f98cfc35c5a10d38aae68be4b0a3f6a702fd5c28d938ca00094b26d0bcf03da3

                        • C:\Users\Admin\AppData\Local\Temp\is-6QTFP.tmp\Install.tmp

                          MD5

                          45ca138d0bb665df6e4bef2add68c7bf

                          SHA1

                          12c1a48e3a02f319a3d3ca647d04442d55e09265

                          SHA256

                          3960a0597104fc5bbf82bf6c03564a1eb6a829c560d1f50d0a63b4772fafbe37

                          SHA512

                          cd1a0493c26798eb70b3dabb8a439de7792c4676905cad21c6b3f372213ce9f6b65648245defcd36d4f19285160f41c62e1025e772e6b9f11aa126388ea8364f

                        • C:\Users\Admin\AppData\Local\Temp\is-CA997.tmp\Ultra.exe

                          MD5

                          cc2e3f1906f2f7a7318ce8e6f0f00683

                          SHA1

                          ff26f4b8ba148ddd488dde4eadd2412d6c288580

                          SHA256

                          0ed89ff238edaa1b5b084d5c3c7ba6864b59dac5a6fd961a9065e966f55b9cb2

                          SHA512

                          49d86be8794e0161bc2f2db626b9ce0031e9614486605f283c6cd8429fe9d907f3f3851d15cd318df5945ad2acac85da18f042f3692c38b794cc11d27b77a05a

                        • C:\Users\Admin\AppData\Local\Temp\is-CA997.tmp\Ultra.exe

                          MD5

                          cc2e3f1906f2f7a7318ce8e6f0f00683

                          SHA1

                          ff26f4b8ba148ddd488dde4eadd2412d6c288580

                          SHA256

                          0ed89ff238edaa1b5b084d5c3c7ba6864b59dac5a6fd961a9065e966f55b9cb2

                          SHA512

                          49d86be8794e0161bc2f2db626b9ce0031e9614486605f283c6cd8429fe9d907f3f3851d15cd318df5945ad2acac85da18f042f3692c38b794cc11d27b77a05a

                        • \Program Files\install.dll

                          MD5

                          fe60ddbeab6e50c4f490ddf56b52057c

                          SHA1

                          6a71fdf73761a1192fd9c6961f66754a63d6db17

                          SHA256

                          9fcfa73600ff1b588015ffa20779cec6714e48ee6ae15db8766f7ffd5ee3031d

                          SHA512

                          0113b47ba1a33a2f597a26c9b66435483373cde4edb183e0e92abef8ed003743f426ba5ffe25a5807c030cc14d8a95d73aa6af95a85f44a86dd40264ecb96536

                        • \Users\Admin\AppData\Local\Temp\is-CA997.tmp\idp.dll

                          MD5

                          8f995688085bced38ba7795f60a5e1d3

                          SHA1

                          5b1ad67a149c05c50d6e388527af5c8a0af4343a

                          SHA256

                          203d7b61eac96de865ab3b586160e72c78d93ab5532b13d50ef27174126fd006

                          SHA512

                          043d41947ab69fc9297dcb5ad238acc2c35250d1172869945ed1a56894c10f93855f0210cbca41ceee9efb55fd56a35a4ec03c77e252409edc64bfb5fb821c35

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

                          Filesize

                          448KB

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

                          Filesize

                          448KB

                        • memory/752-119-0x0000000000000000-mapping.dmp

                        • 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/2716-116-0x0000000000000000-mapping.dmp

                        • 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/3400-131-0x00007FF6A2B74060-mapping.dmp

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

                          Filesize

                          448KB

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

                          Filesize

                          8KB

                        • memory/3556-200-0x0000000000000000-mapping.dmp

                        • memory/3784-195-0x0000000000000000-mapping.dmp

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

                          Filesize

                          4KB

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

                          Filesize

                          172KB

                        • memory/3928-191-0x0000000000000000-mapping.dmp

                        • 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/3972-120-0x0000000000000000-mapping.dmp

                        • 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

                        • memory/4188-204-0x00007FF6A2B74060-mapping.dmp

                        • memory/4364-211-0x0000000000000000-mapping.dmp