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Analysis

  • max time kernel
    1795s
  • max time network
    1790s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    28-04-2021 04:33

General

  • Target

    keygen-step-4.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 14 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 Winmgmt
    1⤵
      PID:2616
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s Browser
      1⤵
        PID:2864
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s WpnService
        1⤵
        • Modifies registry class
        PID:2644
      • 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:3924
        • 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:2676
          • 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:1192
        • 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:3912
        • 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:812
          • C:\Users\Admin\AppData\Local\Temp\is-V5OU4.tmp\Install.tmp
            "C:\Users\Admin\AppData\Local\Temp\is-V5OU4.tmp\Install.tmp" /SL5="$7007A,235791,152064,C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe"
            3⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of WriteProcessMemory
            PID:3848
            • C:\Users\Admin\AppData\Local\Temp\is-LRLBR.tmp\Ultra.exe
              "C:\Users\Admin\AppData\Local\Temp\is-LRLBR.tmp\Ultra.exe" /S /UID=burnerch1
              4⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:3784
              • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe
                dw20.exe -x -s 1256
                5⤵
                • Suspicious behavior: EnumeratesProcesses
                PID:2332
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
        1⤵
          PID:2472
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
          1⤵
            PID:2456
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
            1⤵
              PID:1852
            • \??\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:1748
              • 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:3776
              • 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:1804
            • 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 UserManager
                1⤵
                  PID:1276
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s Themes
                  1⤵
                    PID:1228
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                    1⤵
                      PID:1104
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                      1⤵
                        PID:928
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                        1⤵
                          PID:352

                        Network

                        MITRE ATT&CK Matrix ATT&CK v6

                        Discovery

                        System Information Discovery

                        2
                        T1082

                        Query Registry

                        1
                        T1012

                        Command and Control

                        Web Service

                        1
                        T1102

                        Replay Monitor

                        Loading Replay Monitor...

                        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-LRLBR.tmp\Ultra.exe
                          MD5

                          cc2e3f1906f2f7a7318ce8e6f0f00683

                          SHA1

                          ff26f4b8ba148ddd488dde4eadd2412d6c288580

                          SHA256

                          0ed89ff238edaa1b5b084d5c3c7ba6864b59dac5a6fd961a9065e966f55b9cb2

                          SHA512

                          49d86be8794e0161bc2f2db626b9ce0031e9614486605f283c6cd8429fe9d907f3f3851d15cd318df5945ad2acac85da18f042f3692c38b794cc11d27b77a05a

                        • C:\Users\Admin\AppData\Local\Temp\is-LRLBR.tmp\Ultra.exe
                          MD5

                          cc2e3f1906f2f7a7318ce8e6f0f00683

                          SHA1

                          ff26f4b8ba148ddd488dde4eadd2412d6c288580

                          SHA256

                          0ed89ff238edaa1b5b084d5c3c7ba6864b59dac5a6fd961a9065e966f55b9cb2

                          SHA512

                          49d86be8794e0161bc2f2db626b9ce0031e9614486605f283c6cd8429fe9d907f3f3851d15cd318df5945ad2acac85da18f042f3692c38b794cc11d27b77a05a

                        • C:\Users\Admin\AppData\Local\Temp\is-V5OU4.tmp\Install.tmp
                          MD5

                          45ca138d0bb665df6e4bef2add68c7bf

                          SHA1

                          12c1a48e3a02f319a3d3ca647d04442d55e09265

                          SHA256

                          3960a0597104fc5bbf82bf6c03564a1eb6a829c560d1f50d0a63b4772fafbe37

                          SHA512

                          cd1a0493c26798eb70b3dabb8a439de7792c4676905cad21c6b3f372213ce9f6b65648245defcd36d4f19285160f41c62e1025e772e6b9f11aa126388ea8364f

                        • \Program Files\install.dll
                          MD5

                          fe60ddbeab6e50c4f490ddf56b52057c

                          SHA1

                          6a71fdf73761a1192fd9c6961f66754a63d6db17

                          SHA256

                          9fcfa73600ff1b588015ffa20779cec6714e48ee6ae15db8766f7ffd5ee3031d

                          SHA512

                          0113b47ba1a33a2f597a26c9b66435483373cde4edb183e0e92abef8ed003743f426ba5ffe25a5807c030cc14d8a95d73aa6af95a85f44a86dd40264ecb96536

                        • \Users\Admin\AppData\Local\Temp\is-LRLBR.tmp\idp.dll
                          MD5

                          8f995688085bced38ba7795f60a5e1d3

                          SHA1

                          5b1ad67a149c05c50d6e388527af5c8a0af4343a

                          SHA256

                          203d7b61eac96de865ab3b586160e72c78d93ab5532b13d50ef27174126fd006

                          SHA512

                          043d41947ab69fc9297dcb5ad238acc2c35250d1172869945ed1a56894c10f93855f0210cbca41ceee9efb55fd56a35a4ec03c77e252409edc64bfb5fb821c35

                        • memory/352-158-0x000001E078E40000-0x000001E078EB0000-memory.dmp
                          Filesize

                          448KB

                        • memory/352-232-0x000001E078F20000-0x000001E078F91000-memory.dmp
                          Filesize

                          452KB

                        • memory/812-193-0x0000000000400000-0x000000000042B000-memory.dmp
                          Filesize

                          172KB

                        • memory/812-191-0x0000000000000000-mapping.dmp
                        • memory/928-151-0x0000020859E40000-0x0000020859EB0000-memory.dmp
                          Filesize

                          448KB

                        • memory/928-240-0x000002085A4B0000-0x000002085A521000-memory.dmp
                          Filesize

                          452KB

                        • memory/1104-147-0x0000026B11320000-0x0000026B11390000-memory.dmp
                          Filesize

                          448KB

                        • memory/1104-238-0x0000026B11500000-0x0000026B11571000-memory.dmp
                          Filesize

                          452KB

                        • memory/1192-124-0x0000000002600000-0x000000000265C000-memory.dmp
                          Filesize

                          368KB

                        • memory/1192-123-0x0000000004002000-0x0000000004103000-memory.dmp
                          Filesize

                          1.0MB

                        • memory/1192-119-0x0000000000000000-mapping.dmp
                        • memory/1228-246-0x00000157772B0000-0x0000015777321000-memory.dmp
                          Filesize

                          452KB

                        • memory/1228-169-0x0000015777240000-0x00000157772B0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1276-177-0x000001C197B60000-0x000001C197BD0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1276-248-0x000001C1980B0000-0x000001C198121000-memory.dmp
                          Filesize

                          452KB

                        • memory/1352-157-0x000001A927A50000-0x000001A927AC0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1352-242-0x000001A928170000-0x000001A9281E1000-memory.dmp
                          Filesize

                          452KB

                        • memory/1748-139-0x0000026796590000-0x0000026796600000-memory.dmp
                          Filesize

                          448KB

                        • memory/1748-213-0x00000267961A0000-0x00000267961A1000-memory.dmp
                          Filesize

                          4KB

                        • memory/1748-212-0x0000026796200000-0x0000026796204000-memory.dmp
                          Filesize

                          16KB

                        • memory/1748-216-0x0000026796120000-0x0000026796124000-memory.dmp
                          Filesize

                          16KB

                        • memory/1748-126-0x00000267961F0000-0x00000267961F2000-memory.dmp
                          Filesize

                          8KB

                        • memory/1748-137-0x00000267964D0000-0x000002679651B000-memory.dmp
                          Filesize

                          300KB

                        • memory/1748-214-0x00000267961A0000-0x00000267961A4000-memory.dmp
                          Filesize

                          16KB

                        • memory/1804-199-0x00007FF665344060-mapping.dmp
                        • memory/1804-210-0x000001BAE1C00000-0x000001BAE1CFF000-memory.dmp
                          Filesize

                          1020KB

                        • memory/1804-204-0x000001BADF770000-0x000001BADF7E1000-memory.dmp
                          Filesize

                          452KB

                        • memory/1804-203-0x000001BADF460000-0x000001BADF4AB000-memory.dmp
                          Filesize

                          300KB

                        • memory/1852-163-0x000001AD22F50000-0x000001AD22FC0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1852-244-0x000001AD234B0000-0x000001AD23521000-memory.dmp
                          Filesize

                          452KB

                        • memory/2332-211-0x0000000000000000-mapping.dmp
                        • memory/2456-234-0x00000122DE8A0000-0x00000122DE911000-memory.dmp
                          Filesize

                          452KB

                        • memory/2456-166-0x00000122DE830000-0x00000122DE8A0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2472-140-0x000001B8EADD0000-0x000001B8EAE40000-memory.dmp
                          Filesize

                          448KB

                        • memory/2472-236-0x000001B8EB340000-0x000001B8EB3B1000-memory.dmp
                          Filesize

                          452KB

                        • memory/2616-179-0x000001C469900000-0x000001C469970000-memory.dmp
                          Filesize

                          448KB

                        • memory/2616-250-0x000001C46A040000-0x000001C46A0B1000-memory.dmp
                          Filesize

                          452KB

                        • memory/2644-252-0x000001BE66140000-0x000001BE661B1000-memory.dmp
                          Filesize

                          452KB

                        • memory/2644-181-0x000001BE65C40000-0x000001BE65CB0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2676-116-0x0000000000000000-mapping.dmp
                        • memory/2864-146-0x000001EB92840000-0x000001EB928B0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2864-230-0x000001EB928B0000-0x000001EB92921000-memory.dmp
                          Filesize

                          452KB

                        • memory/3776-152-0x000002B298670000-0x000002B2986E0000-memory.dmp
                          Filesize

                          448KB

                        • memory/3776-127-0x00007FF665344060-mapping.dmp
                        • memory/3784-205-0x0000000000000000-mapping.dmp
                        • memory/3784-208-0x0000000002450000-0x0000000002452000-memory.dmp
                          Filesize

                          8KB

                        • memory/3848-202-0x00000000001E0000-0x00000000001E1000-memory.dmp
                          Filesize

                          4KB

                        • memory/3848-195-0x0000000000000000-mapping.dmp
                        • memory/3912-189-0x0000000001360000-0x0000000001361000-memory.dmp
                          Filesize

                          4KB

                        • memory/3912-187-0x0000000001330000-0x0000000001331000-memory.dmp
                          Filesize

                          4KB

                        • memory/3912-185-0x0000000000EE0000-0x0000000000EE1000-memory.dmp
                          Filesize

                          4KB

                        • memory/3912-182-0x0000000000000000-mapping.dmp
                        • memory/3912-188-0x0000000001340000-0x000000000135C000-memory.dmp
                          Filesize

                          112KB

                        • memory/3912-190-0x0000000001860000-0x0000000001862000-memory.dmp
                          Filesize

                          8KB