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Analysis

  • max time kernel
    22s
  • max time network
    70s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    04-05-2021 05:23

General

  • Target

    keygen-step-4d.exe

  • Size

    4.6MB

  • MD5

    563107b1df2a00f4ec868acd9e08a205

  • SHA1

    9cb9c91d66292f5317aa50d92e38834861e9c9b7

  • SHA256

    bf2bd257dde4921ce83c7c1303fafe7f9f81e53c2775d3c373ced482b22eb8a9

  • SHA512

    99a8d247fa435c4cd95be7bc64c7dd6e382371f3a3c160aac3995fd705e4fd3f6622c23784a4ae3457c87536347d15eda3f08aa616450778a99376df540d74d1

Score
8/10

Malware Config

Signatures

  • Downloads MZ/PE file
  • Drops file in Drivers directory 1 IoCs
  • 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 2 IoCs

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

  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Program Files directory 5 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 5 IoCs
  • Modifies registry class 12 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 17 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs

Processes

  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
    1⤵
      PID:1896
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s WpnService
      1⤵
        PID:2760
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
        1⤵
          PID:2752
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s Browser
          1⤵
            PID:2596
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
            1⤵
              PID:2484
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
              1⤵
                PID:2416
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s SENS
                1⤵
                  PID:1448
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                  1⤵
                    PID:1316
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s Themes
                    1⤵
                      PID:1268
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                      1⤵
                        PID:1120
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                        1⤵
                          PID:1032
                        • c:\windows\system32\svchost.exe
                          c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                          1⤵
                            PID:68
                          • 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:4020
                            • 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:2880
                              • 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:1228
                            • 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:3668
                            • 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:3980
                              • C:\Users\Admin\AppData\Local\Temp\is-V3MNB.tmp\Install.tmp
                                "C:\Users\Admin\AppData\Local\Temp\is-V3MNB.tmp\Install.tmp" /SL5="$60160,235791,152064,C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe"
                                3⤵
                                • Executes dropped EXE
                                • Loads dropped DLL
                                • Suspicious use of WriteProcessMemory
                                PID:2020
                                • C:\Users\Admin\AppData\Local\Temp\is-OHFDO.tmp\Ultra.exe
                                  "C:\Users\Admin\AppData\Local\Temp\is-OHFDO.tmp\Ultra.exe" /S /UID=burnerch1
                                  4⤵
                                  • Drops file in Drivers directory
                                  • Executes dropped EXE
                                  • Drops file in Program Files directory
                                  • Suspicious use of AdjustPrivilegeToken
                                  PID:3668
                                  • C:\Program Files\Uninstall Information\ZSXEYFGGSI\ultramediaburner.exe
                                    "C:\Program Files\Uninstall Information\ZSXEYFGGSI\ultramediaburner.exe" /VERYSILENT
                                    5⤵
                                      PID:4120
                            • \??\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:1884
                              • 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:2136
                              • C:\Windows\system32\svchost.exe
                                C:\Windows\system32\svchost.exe -k SystemNetworkService
                                2⤵
                                • Checks processor information in registry
                                • Modifies registry class
                                PID:3856

                            Network

                            MITRE ATT&CK Enterprise v6

                            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-OHFDO.tmp\Ultra.exe

                              MD5

                              cc2e3f1906f2f7a7318ce8e6f0f00683

                              SHA1

                              ff26f4b8ba148ddd488dde4eadd2412d6c288580

                              SHA256

                              0ed89ff238edaa1b5b084d5c3c7ba6864b59dac5a6fd961a9065e966f55b9cb2

                              SHA512

                              49d86be8794e0161bc2f2db626b9ce0031e9614486605f283c6cd8429fe9d907f3f3851d15cd318df5945ad2acac85da18f042f3692c38b794cc11d27b77a05a

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

                              MD5

                              cc2e3f1906f2f7a7318ce8e6f0f00683

                              SHA1

                              ff26f4b8ba148ddd488dde4eadd2412d6c288580

                              SHA256

                              0ed89ff238edaa1b5b084d5c3c7ba6864b59dac5a6fd961a9065e966f55b9cb2

                              SHA512

                              49d86be8794e0161bc2f2db626b9ce0031e9614486605f283c6cd8429fe9d907f3f3851d15cd318df5945ad2acac85da18f042f3692c38b794cc11d27b77a05a

                            • C:\Users\Admin\AppData\Local\Temp\is-V3MNB.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-OHFDO.tmp\idp.dll

                              MD5

                              8f995688085bced38ba7795f60a5e1d3

                              SHA1

                              5b1ad67a149c05c50d6e388527af5c8a0af4343a

                              SHA256

                              203d7b61eac96de865ab3b586160e72c78d93ab5532b13d50ef27174126fd006

                              SHA512

                              043d41947ab69fc9297dcb5ad238acc2c35250d1172869945ed1a56894c10f93855f0210cbca41ceee9efb55fd56a35a4ec03c77e252409edc64bfb5fb821c35

                            • memory/68-172-0x000001F5A3030000-0x000001F5A30A0000-memory.dmp

                              Filesize

                              448KB

                            • memory/1032-160-0x00000229A8860000-0x00000229A88D0000-memory.dmp

                              Filesize

                              448KB

                            • memory/1120-155-0x0000022DEB750000-0x0000022DEB7C0000-memory.dmp

                              Filesize

                              448KB

                            • memory/1228-141-0x0000000004603000-0x0000000004704000-memory.dmp

                              Filesize

                              1.0MB

                            • memory/1228-144-0x0000000004880000-0x00000000048DC000-memory.dmp

                              Filesize

                              368KB

                            • memory/1228-119-0x0000000000000000-mapping.dmp

                            • memory/1268-190-0x000002A94F1D0000-0x000002A94F240000-memory.dmp

                              Filesize

                              448KB

                            • memory/1316-192-0x00000280C1F70000-0x00000280C1FE0000-memory.dmp

                              Filesize

                              448KB

                            • memory/1448-167-0x0000024AA2900000-0x0000024AA2970000-memory.dmp

                              Filesize

                              448KB

                            • memory/1884-154-0x000001EAB62F0000-0x000001EAB6360000-memory.dmp

                              Filesize

                              448KB

                            • memory/1896-173-0x0000021BF0CD0000-0x0000021BF0D40000-memory.dmp

                              Filesize

                              448KB

                            • memory/2020-188-0x0000000000000000-mapping.dmp

                            • memory/2020-196-0x00000000001E0000-0x00000000001E1000-memory.dmp

                              Filesize

                              4KB

                            • memory/2136-166-0x00000267BAD00000-0x00000267BAD70000-memory.dmp

                              Filesize

                              448KB

                            • memory/2136-133-0x00007FF6416E4060-mapping.dmp

                            • memory/2416-149-0x0000011F466B0000-0x0000011F46720000-memory.dmp

                              Filesize

                              448KB

                            • memory/2416-146-0x0000011F46060000-0x0000011F460AB000-memory.dmp

                              Filesize

                              300KB

                            • memory/2484-143-0x000002D76D070000-0x000002D76D0E0000-memory.dmp

                              Filesize

                              448KB

                            • memory/2596-165-0x000001F72A790000-0x000001F72A800000-memory.dmp

                              Filesize

                              448KB

                            • memory/2752-194-0x000001E5E9040000-0x000001E5E90B0000-memory.dmp

                              Filesize

                              448KB

                            • memory/2760-198-0x0000024613A40000-0x0000024613AB0000-memory.dmp

                              Filesize

                              448KB

                            • memory/2880-116-0x0000000000000000-mapping.dmp

                            • memory/3668-128-0x00000000007F0000-0x00000000007F1000-memory.dmp

                              Filesize

                              4KB

                            • memory/3668-130-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

                              Filesize

                              4KB

                            • memory/3668-148-0x000000001B410000-0x000000001B412000-memory.dmp

                              Filesize

                              8KB

                            • memory/3668-129-0x0000000000BD0000-0x0000000000BEC000-memory.dmp

                              Filesize

                              112KB

                            • memory/3668-200-0x0000000000000000-mapping.dmp

                            • memory/3668-126-0x00000000006B0000-0x00000000006B1000-memory.dmp

                              Filesize

                              4KB

                            • memory/3668-120-0x0000000000000000-mapping.dmp

                            • memory/3668-203-0x0000000002AC0000-0x0000000002AC2000-memory.dmp

                              Filesize

                              8KB

                            • memory/3856-204-0x00007FF6416E4060-mapping.dmp

                            • memory/3856-208-0x00000202EF040000-0x00000202EF0B0000-memory.dmp

                              Filesize

                              448KB

                            • memory/3856-207-0x00000202EED20000-0x00000202EED6B000-memory.dmp

                              Filesize

                              300KB

                            • memory/3980-184-0x0000000000000000-mapping.dmp

                            • memory/3980-186-0x0000000000400000-0x000000000042B000-memory.dmp

                              Filesize

                              172KB