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24-04-2021 06:39

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23-04-2021 19:10

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23-04-2021 13:38

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23-04-2021 13:38

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23-04-2021 13:38

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23-04-2021 05:23

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Analysis

  • max time kernel
    1794s
  • max time network
    1238s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    23-04-2021 13:38

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 4 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 1 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 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 15 IoCs
  • Modifies registry class 12 IoCs
  • Suspicious behavior: EnumeratesProcesses 21 IoCs
  • Suspicious use of AdjustPrivilegeToken 28 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 42 IoCs

Processes

  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s Browser
    1⤵
      PID:2808
    • 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 Winmgmt
        1⤵
        • Modifies registry class
        PID:2676
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
        1⤵
          PID:2476
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
          1⤵
            PID:2448
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
            1⤵
              PID:1880
            • 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:3912
              • 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:2696
                • 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:224
              • 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
                • Suspicious use of WriteProcessMemory
                PID:2400
                • C:\ProgramData\1667737.exe
                  "C:\ProgramData\1667737.exe"
                  3⤵
                  • Executes dropped EXE
                  • Adds Run key to start application
                  • Suspicious use of WriteProcessMemory
                  PID:2464
                  • C:\ProgramData\Windows Host\Windows Host.exe
                    "C:\ProgramData\Windows Host\Windows Host.exe"
                    4⤵
                    • Executes dropped EXE
                    PID:1188
                • C:\Windows\system32\WerFault.exe
                  C:\Windows\system32\WerFault.exe -u -p 2400 -s 608
                  3⤵
                  • Program crash
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:3044
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s SENS
              1⤵
                PID:1424
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                1⤵
                  PID:1292
                • 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:1068
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                        1⤵
                          PID:1012
                        • \??\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:3888
                          • 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:4020

                        Network

                        MITRE ATT&CK Matrix ATT&CK v6

                        Persistence

                        Registry Run Keys / Startup Folder

                        1
                        T1060

                        Defense Evasion

                        Modify Registry

                        1
                        T1112

                        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:\ProgramData\1667737.exe
                          MD5

                          055a20b8347170594cbc8b8aa2197b2a

                          SHA1

                          9bd84ab6cb4df6cb0fd1c7a0fe7efe31357e1f10

                          SHA256

                          03c8a390f7030ea876188436d6cbe99592b739d40a53e60ad0869c4c6194d828

                          SHA512

                          914c928a4060ddc2bda4e96918c22c4df14160e869a6c5b62eeafe7bb1044006993532e55929d2d89bac08c1b896619b016a2caf6011d155646fb7421ba3b6f2

                        • C:\ProgramData\1667737.exe
                          MD5

                          055a20b8347170594cbc8b8aa2197b2a

                          SHA1

                          9bd84ab6cb4df6cb0fd1c7a0fe7efe31357e1f10

                          SHA256

                          03c8a390f7030ea876188436d6cbe99592b739d40a53e60ad0869c4c6194d828

                          SHA512

                          914c928a4060ddc2bda4e96918c22c4df14160e869a6c5b62eeafe7bb1044006993532e55929d2d89bac08c1b896619b016a2caf6011d155646fb7421ba3b6f2

                        • C:\ProgramData\Windows Host\Windows Host.exe
                          MD5

                          055a20b8347170594cbc8b8aa2197b2a

                          SHA1

                          9bd84ab6cb4df6cb0fd1c7a0fe7efe31357e1f10

                          SHA256

                          03c8a390f7030ea876188436d6cbe99592b739d40a53e60ad0869c4c6194d828

                          SHA512

                          914c928a4060ddc2bda4e96918c22c4df14160e869a6c5b62eeafe7bb1044006993532e55929d2d89bac08c1b896619b016a2caf6011d155646fb7421ba3b6f2

                        • C:\ProgramData\Windows Host\Windows Host.exe
                          MD5

                          055a20b8347170594cbc8b8aa2197b2a

                          SHA1

                          9bd84ab6cb4df6cb0fd1c7a0fe7efe31357e1f10

                          SHA256

                          03c8a390f7030ea876188436d6cbe99592b739d40a53e60ad0869c4c6194d828

                          SHA512

                          914c928a4060ddc2bda4e96918c22c4df14160e869a6c5b62eeafe7bb1044006993532e55929d2d89bac08c1b896619b016a2caf6011d155646fb7421ba3b6f2

                        • 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/224-123-0x00000000049B8000-0x0000000004AB9000-memory.dmp
                          Filesize

                          1.0MB

                        • memory/224-124-0x0000000004940000-0x000000000499C000-memory.dmp
                          Filesize

                          368KB

                        • memory/224-119-0x0000000000000000-mapping.dmp
                        • memory/1012-168-0x0000027138B90000-0x0000027138C00000-memory.dmp
                          Filesize

                          448KB

                        • memory/1012-231-0x0000027139230000-0x00000271392A0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1068-176-0x00000197E5400000-0x00000197E5470000-memory.dmp
                          Filesize

                          448KB

                        • memory/1068-239-0x00000197E5530000-0x00000197E55A0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1108-174-0x0000029CE2E70000-0x0000029CE2EE0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1108-237-0x0000029CE2EE0000-0x0000029CE2F50000-memory.dmp
                          Filesize

                          448KB

                        • memory/1188-213-0x000000000A530000-0x000000000A531000-memory.dmp
                          Filesize

                          4KB

                        • memory/1188-214-0x0000000004CB0000-0x0000000004CB1000-memory.dmp
                          Filesize

                          4KB

                        • memory/1188-203-0x0000000000000000-mapping.dmp
                        • memory/1228-245-0x0000026CE1810000-0x0000026CE1880000-memory.dmp
                          Filesize

                          448KB

                        • memory/1228-149-0x0000026CE1290000-0x0000026CE1300000-memory.dmp
                          Filesize

                          448KB

                        • memory/1292-154-0x00000214047E0000-0x0000021404850000-memory.dmp
                          Filesize

                          448KB

                        • memory/1292-247-0x0000021405240000-0x00000214052B0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1424-241-0x00000233CF000000-0x00000233CF070000-memory.dmp
                          Filesize

                          448KB

                        • memory/1424-178-0x00000233CEDD0000-0x00000233CEE40000-memory.dmp
                          Filesize

                          448KB

                        • memory/1880-243-0x00000299FFD70000-0x00000299FFDE0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1880-180-0x00000299FFD00000-0x00000299FFD70000-memory.dmp
                          Filesize

                          448KB

                        • memory/2400-187-0x00000000012A0000-0x00000000012A1000-memory.dmp
                          Filesize

                          4KB

                        • memory/2400-190-0x000000001B9B0000-0x000000001B9B2000-memory.dmp
                          Filesize

                          8KB

                        • memory/2400-189-0x00000000012D0000-0x00000000012D1000-memory.dmp
                          Filesize

                          4KB

                        • memory/2400-188-0x00000000012B0000-0x00000000012CC000-memory.dmp
                          Filesize

                          112KB

                        • memory/2400-185-0x0000000000BA0000-0x0000000000BA1000-memory.dmp
                          Filesize

                          4KB

                        • memory/2400-182-0x0000000000000000-mapping.dmp
                        • memory/2448-235-0x000001ACC5140000-0x000001ACC51B0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2448-172-0x000001ACC4B40000-0x000001ACC4BB0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2464-198-0x0000000003200000-0x0000000003201000-memory.dmp
                          Filesize

                          4KB

                        • memory/2464-196-0x0000000000EC0000-0x0000000000EC1000-memory.dmp
                          Filesize

                          4KB

                        • memory/2464-201-0x0000000005880000-0x0000000005881000-memory.dmp
                          Filesize

                          4KB

                        • memory/2464-202-0x0000000003030000-0x0000000003031000-memory.dmp
                          Filesize

                          4KB

                        • memory/2464-199-0x0000000002FA0000-0x0000000002FAE000-memory.dmp
                          Filesize

                          56KB

                        • memory/2464-193-0x0000000000000000-mapping.dmp
                        • memory/2464-200-0x000000000A100000-0x000000000A101000-memory.dmp
                          Filesize

                          4KB

                        • memory/2476-170-0x000002CF88170000-0x000002CF881E0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2476-233-0x000002CF88240000-0x000002CF882B0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2676-249-0x000001EE99630000-0x000001EE996A0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2676-159-0x000001EE98270000-0x000001EE982E0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2688-251-0x000001DEE72B0000-0x000001DEE7320000-memory.dmp
                          Filesize

                          448KB

                        • memory/2688-166-0x000001DEE71D0000-0x000001DEE7240000-memory.dmp
                          Filesize

                          448KB

                        • memory/2696-116-0x0000000000000000-mapping.dmp
                        • memory/2808-161-0x0000017902600000-0x0000017902670000-memory.dmp
                          Filesize

                          448KB

                        • memory/2808-229-0x0000017902A20000-0x0000017902A90000-memory.dmp
                          Filesize

                          448KB

                        • memory/3888-219-0x00000236D41B0000-0x00000236D41B4000-memory.dmp
                          Filesize

                          16KB

                        • memory/3888-217-0x00000236D41C0000-0x00000236D41C4000-memory.dmp
                          Filesize

                          16KB

                        • memory/3888-216-0x00000236D41C0000-0x00000236D41C1000-memory.dmp
                          Filesize

                          4KB

                        • memory/3888-215-0x00000236D6680000-0x00000236D6684000-memory.dmp
                          Filesize

                          16KB

                        • memory/3888-150-0x00000236D66D0000-0x00000236D6740000-memory.dmp
                          Filesize

                          448KB

                        • memory/3888-148-0x00000236D6370000-0x00000236D63BB000-memory.dmp
                          Filesize

                          300KB

                        • memory/4020-192-0x000002A9C46A0000-0x000002A9C47A1000-memory.dmp
                          Filesize

                          1.0MB

                        • memory/4020-165-0x000002A9C2680000-0x000002A9C26F0000-memory.dmp
                          Filesize

                          448KB

                        • memory/4020-127-0x00007FF78BA54060-mapping.dmp