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Analysis

  • max time kernel
    1788s
  • max time network
    1796s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    29-04-2021 05:03

General

  • Target

    keygen-step-4d.exe

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 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.

  • Program crash 1 IoCs
  • 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 16 IoCs
  • Modifies registry class 16 IoCs
  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 37 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs

Processes

  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s Themes
    1⤵
      PID:1316
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s UserManager
      1⤵
        PID:1348
      • 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 ProfSvc
          1⤵
            PID:1100
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s Schedule
            1⤵
              PID:912
            • 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 ShellHWDetection
                1⤵
                  PID:1872
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
                  1⤵
                  • Suspicious use of SetThreadContext
                  • Modifies registry class
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  • Suspicious use of WriteProcessMemory
                  PID:2372
                  • 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
                    PID:2768
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s Browser
                  1⤵
                    PID:2560
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
                    1⤵
                      PID:2424
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
                      1⤵
                        PID:2680
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s WpnService
                        1⤵
                          PID:2708
                        • 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:2116
                          • 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:2736
                            • 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:1276
                          • 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:188
                            • C:\Windows\system32\WerFault.exe
                              C:\Windows\system32\WerFault.exe -u -p 188 -s 1596
                              3⤵
                              • Program crash
                              • Suspicious behavior: EnumeratesProcesses
                              • Suspicious use of AdjustPrivilegeToken
                              PID:1584
                        • \??\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:3176
                          • 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:1000

                        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/188-122-0x0000000000000000-mapping.dmp
                        • memory/188-126-0x0000000000FD0000-0x0000000000FD1000-memory.dmp
                          Filesize

                          4KB

                        • memory/188-130-0x00000000016E0000-0x00000000016E1000-memory.dmp
                          Filesize

                          4KB

                        • memory/188-177-0x000000001BBB0000-0x000000001BBB2000-memory.dmp
                          Filesize

                          8KB

                        • memory/188-136-0x0000000001710000-0x000000000172C000-memory.dmp
                          Filesize

                          112KB

                        • memory/188-139-0x00000000016F0000-0x00000000016F1000-memory.dmp
                          Filesize

                          4KB

                        • memory/912-214-0x000001E4B4BF0000-0x000001E4B4C60000-memory.dmp
                          Filesize

                          448KB

                        • memory/912-150-0x000001E4B4460000-0x000001E4B44AB000-memory.dmp
                          Filesize

                          300KB

                        • memory/912-153-0x000001E4B4B10000-0x000001E4B4B80000-memory.dmp
                          Filesize

                          448KB

                        • memory/1000-166-0x0000013024E70000-0x0000013024EE0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1000-131-0x00007FF6A78A4060-mapping.dmp
                        • memory/1012-172-0x000001E6DB280000-0x000001E6DB2F0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1012-206-0x000001E6DB8B0000-0x000001E6DB920000-memory.dmp
                          Filesize

                          448KB

                        • memory/1100-147-0x00000258DF030000-0x00000258DF0A0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1100-212-0x00000258DF540000-0x00000258DF5B0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1276-145-0x0000000004E5F000-0x0000000004F60000-memory.dmp
                          Filesize

                          1.0MB

                        • memory/1276-148-0x0000000004F70000-0x0000000004FCC000-memory.dmp
                          Filesize

                          368KB

                        • memory/1276-119-0x0000000000000000-mapping.dmp
                        • memory/1316-220-0x000001F058F40000-0x000001F058FB0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1316-171-0x000001F058470000-0x000001F0584E0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1348-222-0x0000022EED520000-0x0000022EED590000-memory.dmp
                          Filesize

                          448KB

                        • memory/1348-178-0x0000022EED100000-0x0000022EED170000-memory.dmp
                          Filesize

                          448KB

                        • memory/1448-216-0x000001A710770000-0x000001A7107E0000-memory.dmp
                          Filesize

                          448KB

                        • memory/1448-159-0x000001A710610000-0x000001A710680000-memory.dmp
                          Filesize

                          448KB

                        • memory/1872-218-0x0000023E977B0000-0x0000023E97820000-memory.dmp
                          Filesize

                          448KB

                        • memory/1872-165-0x0000023E97740000-0x0000023E977B0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2372-210-0x000001A3B5940000-0x000001A3B59B0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2372-185-0x000001A3B4EE0000-0x000001A3B4F50000-memory.dmp
                          Filesize

                          448KB

                        • memory/2424-179-0x0000018CA3F40000-0x0000018CA3FB0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2424-208-0x0000018CA4510000-0x0000018CA4580000-memory.dmp
                          Filesize

                          448KB

                        • memory/2560-204-0x000001B2752B0000-0x000001B275320000-memory.dmp
                          Filesize

                          448KB

                        • memory/2560-164-0x000001B274C80000-0x000001B274CF0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2680-224-0x0000023A60940000-0x0000023A609B0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2680-184-0x0000023A60240000-0x0000023A602B0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2708-190-0x0000020ED6B70000-0x0000020ED6BE0000-memory.dmp
                          Filesize

                          448KB

                        • memory/2708-226-0x0000020ED6F20000-0x0000020ED6F90000-memory.dmp
                          Filesize

                          448KB

                        • memory/2736-116-0x0000000000000000-mapping.dmp
                        • memory/2768-227-0x00007FF6A78A4060-mapping.dmp
                        • memory/2768-231-0x000002C98AA00000-0x000002C98AA71000-memory.dmp
                          Filesize

                          452KB

                        • memory/2768-230-0x000002C98A700000-0x000002C98A74B000-memory.dmp
                          Filesize

                          300KB

                        • memory/2768-233-0x000002C98BB00000-0x000002C98BBFF000-memory.dmp
                          Filesize

                          1020KB

                        • memory/3176-154-0x000002238E240000-0x000002238E2B0000-memory.dmp
                          Filesize

                          448KB