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Analysis

  • max time kernel
    300s
  • max time network
    260s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    29-04-2021 05:37

General

  • Target

    keygen-step-4.exe

  • Size

    4.6MB

  • MD5

    563107b1df2a00f4ec868acd9e08a205

  • SHA1

    9cb9c91d66292f5317aa50d92e38834861e9c9b7

  • SHA256

    bf2bd257dde4921ce83c7c1303fafe7f9f81e53c2775d3c373ced482b22eb8a9

  • SHA512

    99a8d247fa435c4cd95be7bc64c7dd6e382371f3a3c160aac3995fd705e4fd3f6622c23784a4ae3457c87536347d15eda3f08aa616450778a99376df540d74d1

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
  • Suspicious use of SetThreadContext 1 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 2 IoCs

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

  • Modifies data under HKEY_USERS 6 IoCs
  • Modifies registry class 10 IoCs
  • Suspicious behavior: EnumeratesProcesses 21 IoCs
  • Suspicious use of AdjustPrivilegeToken 28 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
    1⤵
      PID:2696
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s WpnService
      1⤵
        PID:2688
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s Browser
        1⤵
        • Modifies registry class
        PID:2580
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
        1⤵
          PID:2408
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
          1⤵
            PID:2380
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
            1⤵
              PID:1864
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s SENS
              1⤵
                PID:1388
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                1⤵
                  PID:1272
                • 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:1108
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                      1⤵
                        PID:1020
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                        1⤵
                          PID:348
                        • 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:2188
                          • 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:2756
                            • 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:932
                          • 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:4028
                            • C:\Windows\system32\WerFault.exe
                              C:\Windows\system32\WerFault.exe -u -p 4028 -s 1588
                              3⤵
                              • Program crash
                              • Suspicious behavior: EnumeratesProcesses
                              • Suspicious use of AdjustPrivilegeToken
                              PID:3800
                        • \??\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:3884
                          • 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
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of WriteProcessMemory
                            PID:3632

                        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\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

                        • \Program Files\install.dll
                          MD5

                          fe60ddbeab6e50c4f490ddf56b52057c

                          SHA1

                          6a71fdf73761a1192fd9c6961f66754a63d6db17

                          SHA256

                          9fcfa73600ff1b588015ffa20779cec6714e48ee6ae15db8766f7ffd5ee3031d

                          SHA512

                          0113b47ba1a33a2f597a26c9b66435483373cde4edb183e0e92abef8ed003743f426ba5ffe25a5807c030cc14d8a95d73aa6af95a85f44a86dd40264ecb96536

                        • memory/348-211-0x00000227A64A0000-0x00000227A6510000-memory.dmp
                          Filesize

                          448KB

                        • memory/348-161-0x00000227A5F90000-0x00000227A6000000-memory.dmp
                          Filesize

                          448KB

                        • memory/932-124-0x0000000004820000-0x000000000487C000-memory.dmp
                          Filesize

                          368KB

                        • memory/932-123-0x0000000002E38000-0x0000000002F39000-memory.dmp
                          Filesize

                          1.0MB

                        • memory/932-119-0x0000000000000000-mapping.dmp
                        • memory/1020-219-0x000002B851640000-0x000002B8516B0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1020-169-0x000002B851100000-0x000002B851170000-memory.dmp
                          Filesize

                          448KB

                        • memory/1108-167-0x000001DAA5910000-0x000001DAA5980000-memory.dmp
                          Filesize

                          448KB

                        • memory/1108-217-0x000001DAA6070000-0x000001DAA60E0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1228-175-0x00000201DA510000-0x00000201DA580000-memory.dmp
                          Filesize

                          448KB

                        • memory/1228-225-0x00000201DA620000-0x00000201DA690000-memory.dmp
                          Filesize

                          448KB

                        • memory/1272-227-0x0000018A9E4E0000-0x0000018A9E550000-memory.dmp
                          Filesize

                          448KB

                        • memory/1272-177-0x0000018A9E0C0000-0x0000018A9E130000-memory.dmp
                          Filesize

                          448KB

                        • memory/1388-221-0x000001F84F1B0000-0x000001F84F220000-memory.dmp
                          Filesize

                          448KB

                        • memory/1388-171-0x000001F84EB20000-0x000001F84EB90000-memory.dmp
                          Filesize

                          448KB

                        • memory/1864-223-0x0000029DB5790000-0x0000029DB5800000-memory.dmp
                          Filesize

                          448KB

                        • memory/1864-173-0x0000029DB56B0000-0x0000029DB5720000-memory.dmp
                          Filesize

                          448KB

                        • memory/2380-215-0x00000184735B0000-0x0000018473620000-memory.dmp
                          Filesize

                          448KB

                        • memory/2380-165-0x0000018472F60000-0x0000018472FD0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2408-213-0x0000017F630E0000-0x0000017F63150000-memory.dmp
                          Filesize

                          448KB

                        • memory/2408-163-0x0000017F63070000-0x0000017F630E0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2580-209-0x000001B7141B0000-0x000001B714220000-memory.dmp
                          Filesize

                          448KB

                        • memory/2580-158-0x000001B713E00000-0x000001B713E70000-memory.dmp
                          Filesize

                          448KB

                        • memory/2688-181-0x0000018AA5A00000-0x0000018AA5A70000-memory.dmp
                          Filesize

                          448KB

                        • memory/2688-231-0x0000018AA5DB0000-0x0000018AA5E20000-memory.dmp
                          Filesize

                          448KB

                        • memory/2696-229-0x000001371A160000-0x000001371A1D0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2696-179-0x000001371A060000-0x000001371A0D0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2756-116-0x0000000000000000-mapping.dmp
                        • memory/3632-159-0x0000020123B70000-0x0000020123BE0000-memory.dmp
                          Filesize

                          448KB

                        • memory/3632-127-0x00007FF774F54060-mapping.dmp
                        • memory/3884-154-0x000001B371E40000-0x000001B371E8B000-memory.dmp
                          Filesize

                          300KB

                        • memory/3884-195-0x000001B371AB0000-0x000001B371AB4000-memory.dmp
                          Filesize

                          16KB

                        • memory/3884-193-0x000001B371B20000-0x000001B371B24000-memory.dmp
                          Filesize

                          16KB

                        • memory/3884-192-0x000001B371B20000-0x000001B371B21000-memory.dmp
                          Filesize

                          4KB

                        • memory/3884-191-0x000001B371B70000-0x000001B371B74000-memory.dmp
                          Filesize

                          16KB

                        • memory/3884-155-0x000001B371F00000-0x000001B371F70000-memory.dmp
                          Filesize

                          448KB

                        • memory/3884-126-0x000001B371B60000-0x000001B371B62000-memory.dmp
                          Filesize

                          8KB

                        • memory/4028-190-0x000000001B2A0000-0x000000001B2A2000-memory.dmp
                          Filesize

                          8KB

                        • memory/4028-189-0x0000000000C20000-0x0000000000C21000-memory.dmp
                          Filesize

                          4KB

                        • memory/4028-188-0x0000000000930000-0x000000000094C000-memory.dmp
                          Filesize

                          112KB

                        • memory/4028-187-0x0000000000920000-0x0000000000921000-memory.dmp
                          Filesize

                          4KB

                        • memory/4028-185-0x00000000004E0000-0x00000000004E1000-memory.dmp
                          Filesize

                          4KB

                        • memory/4028-182-0x0000000000000000-mapping.dmp