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Analysis

  • max time kernel
    1796s
  • max time network
    1722s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    27-04-2021 19:43

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
  • 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 16 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 36 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 Schedule
      1⤵
        PID:1036
      • 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 Themes
          1⤵
            PID:1256
          • 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⤵
                PID:1340
              • 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 WpnService
                  1⤵
                  • Modifies registry class
                  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:\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: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:2744
                            • 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:188
                          • 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:3576
                            • C:\Windows\system32\WerFault.exe
                              C:\Windows\system32\WerFault.exe -u -p 3576 -s 1604
                              3⤵
                              • Program crash
                              • Suspicious behavior: EnumeratesProcesses
                              • Suspicious use of AdjustPrivilegeToken
                              PID:800
                        • \??\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:3804
                          • 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:1008

                        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/188-119-0x0000000000000000-mapping.dmp
                        • memory/188-141-0x0000000004360000-0x00000000043BC000-memory.dmp
                          Filesize

                          368KB

                        • memory/188-139-0x00000000007C7000-0x00000000008C8000-memory.dmp
                          Filesize

                          1.0MB

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

                          448KB

                        • memory/336-208-0x0000013CDB640000-0x0000013CDB6B0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1008-192-0x0000025D4CD00000-0x0000025D4CDFF000-memory.dmp
                          Filesize

                          1020KB

                        • memory/1008-130-0x00007FF6A2B74060-mapping.dmp
                        • memory/1008-167-0x0000025D4A800000-0x0000025D4A870000-memory.dmp
                          Filesize

                          448KB

                        • memory/1036-162-0x000002736CD30000-0x000002736CDA0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1036-216-0x000002736D310000-0x000002736D380000-memory.dmp
                          Filesize

                          448KB

                        • memory/1152-156-0x00000161BBC40000-0x00000161BBCB0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1152-214-0x00000161BBD20000-0x00000161BBD90000-memory.dmp
                          Filesize

                          448KB

                        • memory/1256-222-0x0000025F77D30000-0x0000025F77DA0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1256-178-0x0000025F77C40000-0x0000025F77CB0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1340-224-0x000001EC08F40000-0x000001EC08FB0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1340-186-0x000001EC08490000-0x000001EC08500000-memory.dmp
                          Filesize

                          448KB

                        • memory/1416-168-0x000001E759440000-0x000001E7594B0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1416-218-0x000001E7594B0000-0x000001E759520000-memory.dmp
                          Filesize

                          448KB

                        • memory/1944-220-0x000001B65A7B0000-0x000001B65A820000-memory.dmp
                          Filesize

                          448KB

                        • memory/1944-172-0x000001B65A240000-0x000001B65A2B0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2400-151-0x000002695A3A0000-0x000002695A410000-memory.dmp
                          Filesize

                          448KB

                        • memory/2400-212-0x000002695A940000-0x000002695A9B0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2432-210-0x00000191CCB50000-0x00000191CCBC0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2432-143-0x00000191CC860000-0x00000191CC8AB000-memory.dmp
                          Filesize

                          300KB

                        • memory/2432-149-0x00000191CCA70000-0x00000191CCAE0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2616-163-0x0000017417D80000-0x0000017417DF0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2616-206-0x00000174182B0000-0x0000017418320000-memory.dmp
                          Filesize

                          448KB

                        • memory/2664-226-0x000001FF5FA00000-0x000001FF5FA70000-memory.dmp
                          Filesize

                          448KB

                        • memory/2664-188-0x000001FF5F760000-0x000001FF5F7D0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2724-190-0x000001BFD3A00000-0x000001BFD3A70000-memory.dmp
                          Filesize

                          448KB

                        • memory/2724-228-0x000001BFD3B40000-0x000001BFD3BB0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2744-116-0x0000000000000000-mapping.dmp
                        • memory/3576-126-0x0000000000BD0000-0x0000000000BD1000-memory.dmp
                          Filesize

                          4KB

                        • memory/3576-131-0x00000000011D0000-0x00000000011D1000-memory.dmp
                          Filesize

                          4KB

                        • memory/3576-122-0x0000000000000000-mapping.dmp
                        • memory/3576-145-0x000000001B7E0000-0x000000001B7E2000-memory.dmp
                          Filesize

                          8KB

                        • memory/3576-137-0x00000000011E0000-0x00000000011FC000-memory.dmp
                          Filesize

                          112KB

                        • memory/3576-140-0x0000000001200000-0x0000000001201000-memory.dmp
                          Filesize

                          4KB

                        • memory/3804-152-0x00000252EEE50000-0x00000252EEEC0000-memory.dmp
                          Filesize

                          448KB