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Analysis

  • max time kernel
    1800s
  • max time network
    1307s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    11-06-2021 17:26

General

  • Target

    keygen-step-4.exe

  • Size

    4.6MB

  • MD5

    563107b1df2a00f4ec868acd9e08a205

  • SHA1

    9cb9c91d66292f5317aa50d92e38834861e9c9b7

  • SHA256

    bf2bd257dde4921ce83c7c1303fafe7f9f81e53c2775d3c373ced482b22eb8a9

  • SHA512

    99a8d247fa435c4cd95be7bc64c7dd6e382371f3a3c160aac3995fd705e4fd3f6622c23784a4ae3457c87536347d15eda3f08aa616450778a99376df540d74d1

Malware Config

Signatures

  • Executes dropped EXE 11 IoCs
  • UPX packed file 8 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 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 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Program Files directory 3 IoCs
  • Drops file in Windows directory 1 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 Internet Explorer settings 1 TTPs 3 IoCs
  • Modifies data under HKEY_USERS 14 IoCs
  • Modifies registry class 64 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 41 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s Themes
    1⤵
      PID:1224
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
      1⤵
        PID:2464
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s Browser
        1⤵
          PID:2740
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s WpnService
          1⤵
            PID:2724
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
            1⤵
              PID:2700
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
              1⤵
                PID:2544
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
                1⤵
                  PID:1992
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s SENS
                  1⤵
                    PID:1440
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                    1⤵
                      PID:1296
                    • 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:1064
                        • c:\windows\system32\svchost.exe
                          c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                          1⤵
                            PID:340
                          • C:\Users\Admin\AppData\Local\Temp\keygen-step-4.exe
                            "C:\Users\Admin\AppData\Local\Temp\keygen-step-4.exe"
                            1⤵
                            • Checks computer location settings
                            • Suspicious use of WriteProcessMemory
                            PID:672
                            • 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:3208
                              • C:\Windows\SysWOW64\rundll32.exe
                                "C:\Windows\System32\rundll32.exe" "C:\Program Files\install.dll",install
                                3⤵
                                • Loads dropped DLL
                                • Suspicious behavior: EnumeratesProcesses
                                • Suspicious use of AdjustPrivilegeToken
                                • Suspicious use of WriteProcessMemory
                                PID:1128
                            • 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:204
                            • 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:1128
                              • C:\Users\Admin\AppData\Local\Temp\is-7LTA5.tmp\Install.tmp
                                "C:\Users\Admin\AppData\Local\Temp\is-7LTA5.tmp\Install.tmp" /SL5="$50156,235791,152064,C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe"
                                3⤵
                                • Executes dropped EXE
                                • Loads dropped DLL
                                PID:1876
                            • C:\Users\Admin\AppData\Local\Temp\RarSFX0\filee.exe
                              "C:\Users\Admin\AppData\Local\Temp\RarSFX0\filee.exe"
                              2⤵
                              • Executes dropped EXE
                              • Modifies system certificate store
                              • Suspicious use of WriteProcessMemory
                              PID:1248
                              • C:\Windows\SysWOW64\cmd.exe
                                "C:\Windows\system32\cmd.exe" /c ping 127.0.0.1 && del "C:\Users\Admin\AppData\Local\Temp\RarSFX0\filee.exe" >> NUL
                                3⤵
                                • Suspicious use of WriteProcessMemory
                                PID:2264
                                • C:\Windows\SysWOW64\PING.EXE
                                  ping 127.0.0.1
                                  4⤵
                                  • Runs ping.exe
                                  PID:768
                            • C:\Users\Admin\AppData\Local\Temp\RarSFX0\jg6_6asg.exe
                              "C:\Users\Admin\AppData\Local\Temp\RarSFX0\jg6_6asg.exe"
                              2⤵
                              • Executes dropped EXE
                              • Checks whether UAC is enabled
                              • Suspicious use of AdjustPrivilegeToken
                              PID:4356
                            • C:\Users\Admin\AppData\Local\Temp\RarSFX0\gaoou.exe
                              "C:\Users\Admin\AppData\Local\Temp\RarSFX0\gaoou.exe"
                              2⤵
                              • Executes dropped EXE
                              • Adds Run key to start application
                              • Suspicious use of WriteProcessMemory
                              PID:5012
                              • C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe
                                C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe /scookiestxt C:\Users\Admin\AppData\Local\Temp\fj4ghga23_fsa.txt
                                3⤵
                                • Executes dropped EXE
                                PID:5056
                              • C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe
                                C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe /scookiestxt C:\Users\Admin\AppData\Local\Temp\fj4ghga23_fsa.txt
                                3⤵
                                • Executes dropped EXE
                                • Suspicious behavior: EnumeratesProcesses
                                PID:4820
                              • C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe
                                C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe /scookiestxt C:\Users\Admin\AppData\Local\Temp\fj4ghga23_fsa.txt
                                3⤵
                                • Executes dropped EXE
                                • Suspicious behavior: EnumeratesProcesses
                                PID:1216
                              • C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe
                                C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe /scookiestxt C:\Users\Admin\AppData\Local\Temp\fj4ghga23_fsa.txt
                                3⤵
                                • Executes dropped EXE
                                • Suspicious behavior: EnumeratesProcesses
                                PID:2356
                          • \??\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:616
                            • 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:1264
                            • 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
                              • Suspicious use of AdjustPrivilegeToken
                              • Suspicious use of WriteProcessMemory
                              PID:4140
                          • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdge.exe
                            "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdge.exe" -ServerName:MicrosoftEdge.AppXdnhjhccw3zf0j06tkg3jtqr00qdm0khc.mca
                            1⤵
                            • Drops file in Windows directory
                            • Modifies Internet Explorer settings
                            • Modifies registry class
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of SetWindowsHookEx
                            PID:3264
                          • C:\Windows\system32\browser_broker.exe
                            C:\Windows\system32\browser_broker.exe -Embedding
                            1⤵
                            • Modifies Internet Explorer settings
                            PID:3996
                          • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
                            "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
                            1⤵
                            • Modifies registry class
                            • Suspicious behavior: MapViewOfSection
                            • Suspicious use of SetWindowsHookEx
                            • Suspicious use of WriteProcessMemory
                            PID:4464
                          • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
                            "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
                            1⤵
                            • Modifies Internet Explorer settings
                            • Modifies registry class
                            • Suspicious use of AdjustPrivilegeToken
                            PID:4588
                          • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
                            "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
                            1⤵
                            • Modifies registry class
                            • Suspicious use of AdjustPrivilegeToken
                            PID:644
                          • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
                            "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
                            1⤵
                            • Modifies registry class
                            PID:4292
                          • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
                            "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
                            1⤵
                            • Modifies registry class
                            PID:4800

                          Network

                          MITRE ATT&CK Enterprise v6

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          • memory/204-130-0x0000000002690000-0x0000000002691000-memory.dmp

                            Filesize

                            4KB

                          • memory/204-129-0x0000000002670000-0x000000000268C000-memory.dmp

                            Filesize

                            112KB

                          • memory/204-133-0x00000000026D0000-0x00000000026D2000-memory.dmp

                            Filesize

                            8KB

                          • memory/204-128-0x0000000000EB0000-0x0000000000EB1000-memory.dmp

                            Filesize

                            4KB

                          • memory/204-126-0x00000000006A0000-0x00000000006A1000-memory.dmp

                            Filesize

                            4KB

                          • memory/340-255-0x000001A14EA50000-0x000001A14EAC1000-memory.dmp

                            Filesize

                            452KB

                          • memory/340-170-0x000001A14E380000-0x000001A14E3F0000-memory.dmp

                            Filesize

                            448KB

                          • memory/616-164-0x0000024635AC0000-0x0000024635B30000-memory.dmp

                            Filesize

                            448KB

                          • memory/616-134-0x0000024635A00000-0x0000024635A4B000-memory.dmp

                            Filesize

                            300KB

                          • memory/1064-178-0x000001E1F2B70000-0x000001E1F2BE0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1064-263-0x000001E1F2BE0000-0x000001E1F2C51000-memory.dmp

                            Filesize

                            452KB

                          • memory/1108-261-0x000001FE3ECE0000-0x000001FE3ED51000-memory.dmp

                            Filesize

                            452KB

                          • memory/1108-176-0x000001FE3EC70000-0x000001FE3ECE0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1128-193-0x0000000000400000-0x000000000042B000-memory.dmp

                            Filesize

                            172KB

                          • memory/1128-131-0x0000000002FC7000-0x00000000030C8000-memory.dmp

                            Filesize

                            1.0MB

                          • memory/1128-132-0x0000000002F50000-0x0000000002FAC000-memory.dmp

                            Filesize

                            368KB

                          • memory/1224-269-0x00000220C3C80000-0x00000220C3CF1000-memory.dmp

                            Filesize

                            452KB

                          • memory/1224-184-0x00000220C3B70000-0x00000220C3BE0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1248-203-0x0000000001280000-0x000000000128D000-memory.dmp

                            Filesize

                            52KB

                          • memory/1264-169-0x000001BF1F940000-0x000001BF1F9B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1296-271-0x0000021A3D4A0000-0x0000021A3D511000-memory.dmp

                            Filesize

                            452KB

                          • memory/1296-186-0x0000021A3CEC0000-0x0000021A3CF30000-memory.dmp

                            Filesize

                            448KB

                          • memory/1440-180-0x0000029F58ED0000-0x0000029F58F40000-memory.dmp

                            Filesize

                            448KB

                          • memory/1440-265-0x0000029F59100000-0x0000029F59171000-memory.dmp

                            Filesize

                            452KB

                          • memory/1876-199-0x00000000001E0000-0x00000000001E1000-memory.dmp

                            Filesize

                            4KB

                          • memory/1992-267-0x000001B4ED320000-0x000001B4ED391000-memory.dmp

                            Filesize

                            452KB

                          • memory/1992-182-0x000001B4ED2B0000-0x000001B4ED320000-memory.dmp

                            Filesize

                            448KB

                          • memory/2464-259-0x000001EFDCE40000-0x000001EFDCEB1000-memory.dmp

                            Filesize

                            452KB

                          • memory/2464-174-0x000001EFDC930000-0x000001EFDC9A0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2544-257-0x000001E8ED9B0000-0x000001E8EDA21000-memory.dmp

                            Filesize

                            452KB

                          • memory/2544-172-0x000001E8ED360000-0x000001E8ED3D0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2700-273-0x000001A597100000-0x000001A597171000-memory.dmp

                            Filesize

                            452KB

                          • memory/2700-188-0x000001A596F10000-0x000001A596F80000-memory.dmp

                            Filesize

                            448KB

                          • memory/2724-190-0x000001C9017D0000-0x000001C901840000-memory.dmp

                            Filesize

                            448KB

                          • memory/2724-275-0x000001C901840000-0x000001C9018B1000-memory.dmp

                            Filesize

                            452KB

                          • memory/2740-253-0x000002812F040000-0x000002812F0B1000-memory.dmp

                            Filesize

                            452KB

                          • memory/2740-166-0x000002812EB30000-0x000002812EBA0000-memory.dmp

                            Filesize

                            448KB

                          • memory/4140-245-0x00000190C2990000-0x00000190C2A95000-memory.dmp

                            Filesize

                            1.0MB

                          • memory/4140-211-0x00000190C01D0000-0x00000190C021B000-memory.dmp

                            Filesize

                            300KB

                          • memory/4140-212-0x00000190C0380000-0x00000190C03F1000-memory.dmp

                            Filesize

                            452KB

                          • memory/4140-246-0x00000190C2140000-0x00000190C215A000-memory.dmp

                            Filesize

                            104KB

                          • memory/4356-216-0x0000000003680000-0x0000000003690000-memory.dmp

                            Filesize

                            64KB

                          • memory/4356-222-0x0000000003820000-0x0000000003830000-memory.dmp

                            Filesize

                            64KB