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Analysis

  • max time kernel
    1800s
  • max time network
    1724s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    08-06-2021 06:47

General

  • Target

    keygen-step-4d.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 13 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 46 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:1204
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s UserManager
      1⤵
        PID:1324
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s SENS
        1⤵
          PID:1428
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
          1⤵
            PID:1904
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
            1⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2432
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s WpnService
            1⤵
              PID:2756
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
              1⤵
                PID:2744
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s Browser
                1⤵
                  PID:2664
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
                  1⤵
                    PID:2464
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                    1⤵
                      PID:1076
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                      1⤵
                        PID:924
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                        1⤵
                          PID:1020
                        • 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:1508
                          • 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:1220
                            • 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:1332
                          • 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:1156
                          • 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:2808
                            • C:\Users\Admin\AppData\Local\Temp\is-828PE.tmp\Install.tmp
                              "C:\Users\Admin\AppData\Local\Temp\is-828PE.tmp\Install.tmp" /SL5="$8007C,235791,152064,C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe"
                              3⤵
                              • Executes dropped EXE
                              • Loads dropped DLL
                              PID:2056
                          • 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:1292
                            • 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:2132
                              • C:\Windows\SysWOW64\PING.EXE
                                ping 127.0.0.1
                                4⤵
                                • Runs ping.exe
                                PID:1968
                          • 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:4500
                          • 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:5100
                            • 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:4636
                            • 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:4208
                            • 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:1116
                            • 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:4824
                        • \??\c:\windows\system32\svchost.exe
                          c:\windows\system32\svchost.exe -k netsvcs -s BITS
                          1⤵
                          • Suspicious use of SetThreadContext
                          • Modifies registry class
                          • Suspicious behavior: EnumeratesProcesses
                          • Suspicious use of AdjustPrivilegeToken
                          • Suspicious use of WriteProcessMemory
                          PID:2036
                          • 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:3948
                          • 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:4124
                        • 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:4172
                        • C:\Windows\system32\browser_broker.exe
                          C:\Windows\system32\browser_broker.exe -Embedding
                          1⤵
                          • Modifies Internet Explorer settings
                          PID:4248
                        • 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:4584
                        • 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:5012
                        • 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:4632
                        • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
                          "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
                          1⤵
                            PID:4644
                          • 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:4928

                          Network

                          MITRE ATT&CK Enterprise v6

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          • memory/924-263-0x0000020244210000-0x0000020244281000-memory.dmp

                            Filesize

                            452KB

                          • memory/924-159-0x00000202441A0000-0x0000020244210000-memory.dmp

                            Filesize

                            448KB

                          • memory/1020-171-0x000002E863940000-0x000002E8639B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1020-255-0x000002E863A20000-0x000002E863A91000-memory.dmp

                            Filesize

                            452KB

                          • memory/1076-154-0x0000021D3B050000-0x0000021D3B0C0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1076-261-0x0000021D3B5B0000-0x0000021D3B621000-memory.dmp

                            Filesize

                            452KB

                          • memory/1156-126-0x0000000000340000-0x0000000000341000-memory.dmp

                            Filesize

                            4KB

                          • memory/1156-128-0x0000000000A40000-0x0000000000A41000-memory.dmp

                            Filesize

                            4KB

                          • memory/1156-129-0x0000000002420000-0x000000000243C000-memory.dmp

                            Filesize

                            112KB

                          • memory/1156-130-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

                            Filesize

                            4KB

                          • memory/1156-146-0x000000001AE70000-0x000000001AE72000-memory.dmp

                            Filesize

                            8KB

                          • memory/1204-269-0x0000029D64A40000-0x0000029D64AB1000-memory.dmp

                            Filesize

                            452KB

                          • memory/1204-175-0x0000029D64960000-0x0000029D649D0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1292-203-0x0000000000E70000-0x0000000000E7D000-memory.dmp

                            Filesize

                            52KB

                          • memory/1324-192-0x000001360C6A0000-0x000001360C710000-memory.dmp

                            Filesize

                            448KB

                          • memory/1324-271-0x000001360CC40000-0x000001360CCB1000-memory.dmp

                            Filesize

                            452KB

                          • memory/1332-144-0x00000000043A0000-0x00000000043FC000-memory.dmp

                            Filesize

                            368KB

                          • memory/1332-143-0x000000000415B000-0x000000000425C000-memory.dmp

                            Filesize

                            1.0MB

                          • memory/1428-165-0x000001239F470000-0x000001239F4E0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1428-265-0x000001239F550000-0x000001239F5C1000-memory.dmp

                            Filesize

                            452KB

                          • memory/1904-170-0x000001F5DF350000-0x000001F5DF3C0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1904-267-0x000001F5DF910000-0x000001F5DF981000-memory.dmp

                            Filesize

                            452KB

                          • memory/2036-132-0x000001670AE60000-0x000001670AE62000-memory.dmp

                            Filesize

                            8KB

                          • memory/2036-148-0x000001670B140000-0x000001670B18B000-memory.dmp

                            Filesize

                            300KB

                          • memory/2036-151-0x000001670B200000-0x000001670B270000-memory.dmp

                            Filesize

                            448KB

                          • memory/2036-251-0x000001670AE20000-0x000001670AE24000-memory.dmp

                            Filesize

                            16KB

                          • memory/2036-250-0x000001670AE20000-0x000001670AE21000-memory.dmp

                            Filesize

                            4KB

                          • memory/2036-249-0x000001670AE70000-0x000001670AE74000-memory.dmp

                            Filesize

                            16KB

                          • memory/2056-198-0x00000000001E0000-0x00000000001E1000-memory.dmp

                            Filesize

                            4KB

                          • memory/2432-147-0x000001CD9E7B0000-0x000001CD9E820000-memory.dmp

                            Filesize

                            448KB

                          • memory/2432-259-0x000001CD9E890000-0x000001CD9E901000-memory.dmp

                            Filesize

                            452KB

                          • memory/2464-177-0x0000028B80FD0000-0x0000028B81040000-memory.dmp

                            Filesize

                            448KB

                          • memory/2464-257-0x0000028B81200000-0x0000028B81271000-memory.dmp

                            Filesize

                            452KB

                          • memory/2664-160-0x00000251E6A70000-0x00000251E6AE0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2664-253-0x00000251E70B0000-0x00000251E7121000-memory.dmp

                            Filesize

                            452KB

                          • memory/2744-194-0x000001F247B50000-0x000001F247BC0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2744-273-0x000001F248900000-0x000001F248971000-memory.dmp

                            Filesize

                            452KB

                          • memory/2756-275-0x0000020EF0340000-0x0000020EF03B1000-memory.dmp

                            Filesize

                            452KB

                          • memory/2756-196-0x0000020EEFD80000-0x0000020EEFDF0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2808-188-0x0000000000400000-0x000000000042B000-memory.dmp

                            Filesize

                            172KB

                          • memory/3948-164-0x0000019F26BD0000-0x0000019F26C40000-memory.dmp

                            Filesize

                            448KB

                          • memory/4124-211-0x00000202D9860000-0x00000202D98AB000-memory.dmp

                            Filesize

                            300KB

                          • memory/4124-241-0x00000202DC000000-0x00000202DC105000-memory.dmp

                            Filesize

                            1.0MB

                          • memory/4124-244-0x00000202D9AE0000-0x00000202D9AFB000-memory.dmp

                            Filesize

                            108KB

                          • memory/4124-212-0x00000202D9A60000-0x00000202D9AD1000-memory.dmp

                            Filesize

                            452KB

                          • memory/4500-216-0x0000000003680000-0x0000000003690000-memory.dmp

                            Filesize

                            64KB

                          • memory/4500-222-0x0000000003820000-0x0000000003830000-memory.dmp

                            Filesize

                            64KB