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Analysis

  • max time kernel
    1800s
  • max time network
    1798s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    05-05-2021 12:58

General

  • Target

    keygen-step-4d.exe

Malware Config

Signatures

  • Checks for common network interception software 1 TTPs

    Looks in the registry for tools like Wireshark or Fiddler commonly used to analyze network activity.

  • Downloads MZ/PE file
  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 17 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 2 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • 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 3 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Program Files directory 10 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 16 IoCs
  • Modifies registry class 64 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 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 gpsvc
    1⤵
      PID:996
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s SENS
      1⤵
        PID:1372
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2492
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s WpnService
        1⤵
          PID:2740
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2724
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s Browser
          1⤵
            PID:2604
          • 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:1908
              • 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 Themes
                  1⤵
                    PID:1200
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                    1⤵
                      PID:1084
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                      1⤵
                        PID:340
                      • C:\Users\Admin\AppData\Local\Temp\keygen-step-4d.exe
                        "C:\Users\Admin\AppData\Local\Temp\keygen-step-4d.exe"
                        1⤵
                        • Checks computer location settings
                        • Suspicious use of WriteProcessMemory
                        PID:3892
                        • 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:2072
                          • 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:4028
                        • 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:1020
                        • 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:1904
                          • C:\Users\Admin\AppData\Local\Temp\is-C1C18.tmp\Install.tmp
                            "C:\Users\Admin\AppData\Local\Temp\is-C1C18.tmp\Install.tmp" /SL5="$5008C,235791,152064,C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe"
                            3⤵
                            • Executes dropped EXE
                            • Loads dropped DLL
                            • Suspicious use of WriteProcessMemory
                            PID:2104
                            • C:\Users\Admin\AppData\Local\Temp\is-N4OK2.tmp\Ultra.exe
                              "C:\Users\Admin\AppData\Local\Temp\is-N4OK2.tmp\Ultra.exe" /S /UID=burnerch1
                              4⤵
                              • Drops file in Drivers directory
                              • Executes dropped EXE
                              • Adds Run key to start application
                              • Drops file in Program Files directory
                              • Suspicious use of AdjustPrivilegeToken
                              • Suspicious use of WriteProcessMemory
                              PID:3444
                              • C:\Users\Admin\AppData\Local\Temp\WYXZRZGCPN\ultramediaburner.exe
                                "C:\Users\Admin\AppData\Local\Temp\WYXZRZGCPN\ultramediaburner.exe" /VERYSILENT
                                5⤵
                                • Executes dropped EXE
                                • Suspicious use of WriteProcessMemory
                                PID:3436
                                • C:\Users\Admin\AppData\Local\Temp\is-ER22U.tmp\ultramediaburner.tmp
                                  "C:\Users\Admin\AppData\Local\Temp\is-ER22U.tmp\ultramediaburner.tmp" /SL5="$300D4,281924,62464,C:\Users\Admin\AppData\Local\Temp\WYXZRZGCPN\ultramediaburner.exe" /VERYSILENT
                                  6⤵
                                  • Executes dropped EXE
                                  • Drops file in Program Files directory
                                  • Suspicious behavior: EnumeratesProcesses
                                  • Suspicious use of FindShellTrayWindow
                                  • Suspicious use of WriteProcessMemory
                                  PID:2332
                                  • C:\Program Files (x86)\UltraMediaBurner\UltraMediaBurner.exe
                                    "C:\Program Files (x86)\UltraMediaBurner\UltraMediaBurner.exe" -silent -desktopShortcut -programMenu
                                    7⤵
                                    • Executes dropped EXE
                                    PID:4136
                              • C:\Users\Admin\AppData\Local\Temp\15-ec6a1-3e7-890bc-67f86d4d2b6f9\Pobadojuvae.exe
                                "C:\Users\Admin\AppData\Local\Temp\15-ec6a1-3e7-890bc-67f86d4d2b6f9\Pobadojuvae.exe"
                                5⤵
                                • Executes dropped EXE
                                • Suspicious use of WriteProcessMemory
                                PID:3548
                                • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe
                                  dw20.exe -x -s 1220
                                  6⤵
                                    PID:344
                                • C:\Users\Admin\AppData\Local\Temp\58-819de-94e-1cd9a-fc06388277147\Puwushaginae.exe
                                  "C:\Users\Admin\AppData\Local\Temp\58-819de-94e-1cd9a-fc06388277147\Puwushaginae.exe"
                                  5⤵
                                  • Executes dropped EXE
                                  • Suspicious behavior: EnumeratesProcesses
                                  PID:4196
                          • 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:4276
                            • 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:4596
                              • C:\Windows\SysWOW64\PING.EXE
                                ping 127.0.0.1
                                4⤵
                                • Runs ping.exe
                                PID:4644
                          • 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
                            PID:5104
                          • 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
                            PID:4620
                            • 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:3276
                            • 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:5020
                            • 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:5776
                            • 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:5828
                        • \??\c:\windows\system32\svchost.exe
                          c:\windows\system32\svchost.exe -k netsvcs -s BITS
                          1⤵
                          • Suspicious use of SetThreadContext
                          • Modifies data under HKEY_USERS
                          • Suspicious behavior: EnumeratesProcesses
                          • Suspicious use of AdjustPrivilegeToken
                          • Suspicious use of WriteProcessMemory
                          PID:1808
                          • C:\Windows\system32\svchost.exe
                            C:\Windows\system32\svchost.exe -k SystemNetworkService
                            2⤵
                            • Checks processor information in registry
                            • Modifies data under HKEY_USERS
                            PID:1420
                          • 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:2752
                        • 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 SetWindowsHookEx
                          PID:4792
                        • C:\Windows\system32\browser_broker.exe
                          C:\Windows\system32\browser_broker.exe -Embedding
                          1⤵
                          • Modifies Internet Explorer settings
                          PID:4844
                        • 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:4120
                        • 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
                          PID:2680
                        • 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:4312
                        • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
                          "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
                          1⤵
                            PID:5140
                          • 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:5232

                          Network

                          MITRE ATT&CK Enterprise v6

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          • memory/340-293-0x00000247D6D90000-0x00000247D6E00000-memory.dmp

                            Filesize

                            448KB

                          • memory/340-184-0x00000247D6C40000-0x00000247D6CB0000-memory.dmp

                            Filesize

                            448KB

                          • memory/996-285-0x0000022561310000-0x0000022561380000-memory.dmp

                            Filesize

                            448KB

                          • memory/996-175-0x00000225612A0000-0x0000022561310000-memory.dmp

                            Filesize

                            448KB

                          • memory/1020-140-0x0000000000ED0000-0x0000000000ED1000-memory.dmp

                            Filesize

                            4KB

                          • memory/1020-134-0x0000000002700000-0x000000000271C000-memory.dmp

                            Filesize

                            112KB

                          • memory/1020-129-0x0000000000C20000-0x0000000000C21000-memory.dmp

                            Filesize

                            4KB

                          • memory/1020-127-0x0000000000620000-0x0000000000621000-memory.dmp

                            Filesize

                            4KB

                          • memory/1020-179-0x000000001B210000-0x000000001B212000-memory.dmp

                            Filesize

                            8KB

                          • memory/1084-182-0x0000020DE1890000-0x0000020DE1900000-memory.dmp

                            Filesize

                            448KB

                          • memory/1084-291-0x0000020DE2540000-0x0000020DE25B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1200-299-0x000001F9C72B0000-0x000001F9C7320000-memory.dmp

                            Filesize

                            448KB

                          • memory/1200-190-0x000001F9C71D0000-0x000001F9C7240000-memory.dmp

                            Filesize

                            448KB

                          • memory/1340-161-0x000001F60A470000-0x000001F60A4E0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1372-295-0x000001C2AF820000-0x000001C2AF890000-memory.dmp

                            Filesize

                            448KB

                          • memory/1372-186-0x000001C2AF7B0000-0x000001C2AF820000-memory.dmp

                            Filesize

                            448KB

                          • memory/1420-173-0x000001C9A2480000-0x000001C9A24F0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1808-160-0x000001F455C00000-0x000001F455C70000-memory.dmp

                            Filesize

                            448KB

                          • memory/1808-156-0x000001F455980000-0x000001F4559CB000-memory.dmp

                            Filesize

                            300KB

                          • memory/1904-193-0x0000000000400000-0x000000000042B000-memory.dmp

                            Filesize

                            172KB

                          • memory/1908-297-0x00000201501B0000-0x0000020150220000-memory.dmp

                            Filesize

                            448KB

                          • memory/1908-188-0x000002014FC30000-0x000002014FCA0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2104-199-0x00000000001F0000-0x00000000001F1000-memory.dmp

                            Filesize

                            4KB

                          • memory/2332-222-0x00000000001E0000-0x00000000001E1000-memory.dmp

                            Filesize

                            4KB

                          • memory/2492-289-0x000002C8FBA40000-0x000002C8FBAB0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2492-180-0x000002C8FAF20000-0x000002C8FAF90000-memory.dmp

                            Filesize

                            448KB

                          • memory/2544-177-0x000001C1C5520000-0x000001C1C5590000-memory.dmp

                            Filesize

                            448KB

                          • memory/2544-287-0x000001C1C5BB0000-0x000001C1C5C20000-memory.dmp

                            Filesize

                            448KB

                          • memory/2604-172-0x000001AE946D0000-0x000001AE94740000-memory.dmp

                            Filesize

                            448KB

                          • memory/2604-283-0x000001AE94760000-0x000001AE947D0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2724-166-0x00000203D8980000-0x00000203D89F0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2740-171-0x000002313EF60000-0x000002313EFD0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2752-248-0x000001B63C000000-0x000001B63C101000-memory.dmp

                            Filesize

                            1.0MB

                          • memory/2752-207-0x000001B639670000-0x000001B6396BB000-memory.dmp

                            Filesize

                            300KB

                          • memory/2752-208-0x000001B639970000-0x000001B6399E0000-memory.dmp

                            Filesize

                            448KB

                          • memory/3436-211-0x0000000000400000-0x0000000000416000-memory.dmp

                            Filesize

                            88KB

                          • memory/3444-203-0x0000000002480000-0x0000000002482000-memory.dmp

                            Filesize

                            8KB

                          • memory/3548-225-0x0000000002B60000-0x0000000002B62000-memory.dmp

                            Filesize

                            8KB

                          • memory/4028-155-0x00000000043D0000-0x000000000442C000-memory.dmp

                            Filesize

                            368KB

                          • memory/4028-126-0x00000000041C1000-0x00000000042C2000-memory.dmp

                            Filesize

                            1.0MB

                          • memory/4136-241-0x0000000002975000-0x0000000002977000-memory.dmp

                            Filesize

                            8KB

                          • memory/4136-226-0x0000000002970000-0x0000000002972000-memory.dmp

                            Filesize

                            8KB

                          • memory/4136-240-0x0000000002974000-0x0000000002975000-memory.dmp

                            Filesize

                            4KB

                          • memory/4136-239-0x0000000002972000-0x0000000002974000-memory.dmp

                            Filesize

                            8KB

                          • memory/4196-231-0x00000000030B0000-0x00000000030B2000-memory.dmp

                            Filesize

                            8KB

                          • memory/4196-238-0x00000000030B2000-0x00000000030B4000-memory.dmp

                            Filesize

                            8KB

                          • memory/4276-235-0x0000000000430000-0x000000000043D000-memory.dmp

                            Filesize

                            52KB

                          • memory/5104-250-0x0000000003540000-0x0000000003550000-memory.dmp

                            Filesize

                            64KB

                          • memory/5104-256-0x00000000036E0000-0x00000000036F0000-memory.dmp

                            Filesize

                            64KB