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Analysis

  • max time kernel
    1799s
  • max time network
    1349s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    11-06-2021 17:26

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 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 ShellHWDetection
    1⤵
      PID:1764
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
      1⤵
        PID:2460
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s Browser
        1⤵
        • Modifies registry class
        PID:2768
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s WpnService
        1⤵
          PID:2688
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
          1⤵
            PID:2660
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
            1⤵
              PID:2424
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s UserManager
              1⤵
                PID:1344
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s SENS
                1⤵
                  PID:1296
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s Themes
                  1⤵
                    PID:1136
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                    1⤵
                      PID:1096
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                      1⤵
                        PID:932
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                        1⤵
                          PID:1004
                        • 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:796
                          • 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:3980
                            • 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:2628
                          • 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:3268
                          • 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:412
                            • C:\Users\Admin\AppData\Local\Temp\is-DQV3M.tmp\Install.tmp
                              "C:\Users\Admin\AppData\Local\Temp\is-DQV3M.tmp\Install.tmp" /SL5="$601A4,235791,152064,C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe"
                              3⤵
                              • Executes dropped EXE
                              • Loads dropped DLL
                              PID:1308
                          • 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:3288
                            • 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:576
                              • C:\Windows\SysWOW64\PING.EXE
                                ping 127.0.0.1
                                4⤵
                                • Runs ping.exe
                                PID:2872
                          • 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:4248
                          • 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:4868
                            • 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:4916
                            • 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:4536
                            • 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:2496
                            • 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:892
                        • \??\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:1040
                          • C:\Windows\system32\svchost.exe
                            C:\Windows\system32\svchost.exe -k SystemNetworkService
                            2⤵
                            • Checks processor information in registry
                            • Modifies data under HKEY_USERS
                            PID:1564
                          • 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:2180
                        • 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:3940
                        • C:\Windows\system32\browser_broker.exe
                          C:\Windows\system32\browser_broker.exe -Embedding
                          1⤵
                          • Modifies Internet Explorer settings
                          PID:2724
                        • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
                          "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
                          1⤵
                          • Suspicious behavior: MapViewOfSection
                          • Suspicious use of SetWindowsHookEx
                          • Suspicious use of WriteProcessMemory
                          PID:4352
                        • 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:4988
                        • 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:4512
                        • 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:4788
                        • 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:4856

                        Network

                        MITRE ATT&CK Enterprise v6

                        Replay Monitor

                        Loading Replay Monitor...

                        Downloads

                        • memory/412-193-0x0000000000400000-0x000000000042B000-memory.dmp

                          Filesize

                          172KB

                        • memory/932-268-0x000001FC3E8B0000-0x000001FC3E921000-memory.dmp

                          Filesize

                          452KB

                        • memory/932-178-0x000001FC3E7D0000-0x000001FC3E840000-memory.dmp

                          Filesize

                          448KB

                        • memory/1004-260-0x000001F09B140000-0x000001F09B1B1000-memory.dmp

                          Filesize

                          452KB

                        • memory/1004-169-0x000001F09AA60000-0x000001F09AAD0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1040-163-0x00000193742F0000-0x000001937433B000-memory.dmp

                          Filesize

                          300KB

                        • memory/1040-164-0x00000193743B0000-0x0000019374420000-memory.dmp

                          Filesize

                          448KB

                        • memory/1040-249-0x0000019374020000-0x0000019374024000-memory.dmp

                          Filesize

                          16KB

                        • memory/1040-250-0x0000019373FC0000-0x0000019373FC1000-memory.dmp

                          Filesize

                          4KB

                        • memory/1040-251-0x0000019373FC0000-0x0000019373FC4000-memory.dmp

                          Filesize

                          16KB

                        • memory/1096-266-0x0000023B65C20000-0x0000023B65C91000-memory.dmp

                          Filesize

                          452KB

                        • memory/1096-176-0x0000023B65BB0000-0x0000023B65C20000-memory.dmp

                          Filesize

                          448KB

                        • memory/1136-184-0x0000024D34760000-0x0000024D347D0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1136-274-0x0000024D34D40000-0x0000024D34DB1000-memory.dmp

                          Filesize

                          452KB

                        • memory/1296-270-0x0000017A2A040000-0x0000017A2A0B1000-memory.dmp

                          Filesize

                          452KB

                        • memory/1296-180-0x0000017A29590000-0x0000017A29600000-memory.dmp

                          Filesize

                          448KB

                        • memory/1308-199-0x00000000001E0000-0x00000000001E1000-memory.dmp

                          Filesize

                          4KB

                        • memory/1344-186-0x000001BAFED90000-0x000001BAFEE00000-memory.dmp

                          Filesize

                          448KB

                        • memory/1344-253-0x000001BAFF2A0000-0x000001BAFF311000-memory.dmp

                          Filesize

                          452KB

                        • memory/1564-170-0x000001502B790000-0x000001502B800000-memory.dmp

                          Filesize

                          448KB

                        • memory/1764-182-0x000002BBBC400000-0x000002BBBC470000-memory.dmp

                          Filesize

                          448KB

                        • memory/1764-272-0x000002BBBC510000-0x000002BBBC581000-memory.dmp

                          Filesize

                          452KB

                        • memory/2180-212-0x0000019AEF350000-0x0000019AEF3C1000-memory.dmp

                          Filesize

                          452KB

                        • memory/2180-242-0x0000019AF1B00000-0x0000019AF1C05000-memory.dmp

                          Filesize

                          1.0MB

                        • memory/2180-211-0x0000019AEF230000-0x0000019AEF27B000-memory.dmp

                          Filesize

                          300KB

                        • memory/2180-243-0x0000019AEF3D0000-0x0000019AEF3EA000-memory.dmp

                          Filesize

                          104KB

                        • memory/2424-264-0x0000019BBD840000-0x0000019BBD8B1000-memory.dmp

                          Filesize

                          452KB

                        • memory/2424-174-0x0000019BBD240000-0x0000019BBD2B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2460-172-0x000001EE50C80000-0x000001EE50CF0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2460-262-0x000001EE50D50000-0x000001EE50DC1000-memory.dmp

                          Filesize

                          452KB

                        • memory/2628-132-0x0000000004B20000-0x0000000004B7C000-memory.dmp

                          Filesize

                          368KB

                        • memory/2628-131-0x0000000002FEB000-0x00000000030EC000-memory.dmp

                          Filesize

                          1.0MB

                        • memory/2660-256-0x000002271FDA0000-0x000002271FE11000-memory.dmp

                          Filesize

                          452KB

                        • memory/2660-188-0x000002271FD30000-0x000002271FDA0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2688-190-0x000002856FB70000-0x000002856FBE0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2688-258-0x000002856FF20000-0x000002856FF91000-memory.dmp

                          Filesize

                          452KB

                        • memory/2768-166-0x00000255D1BD0000-0x00000255D1C40000-memory.dmp

                          Filesize

                          448KB

                        • memory/2768-254-0x00000255D1D10000-0x00000255D1D81000-memory.dmp

                          Filesize

                          452KB

                        • memory/3268-130-0x0000000000E80000-0x0000000000E81000-memory.dmp

                          Filesize

                          4KB

                        • memory/3268-126-0x0000000000950000-0x0000000000951000-memory.dmp

                          Filesize

                          4KB

                        • memory/3268-128-0x0000000000E50000-0x0000000000E51000-memory.dmp

                          Filesize

                          4KB

                        • memory/3268-129-0x0000000000E60000-0x0000000000E7C000-memory.dmp

                          Filesize

                          112KB

                        • memory/3268-162-0x000000001B780000-0x000000001B782000-memory.dmp

                          Filesize

                          8KB

                        • memory/3288-203-0x0000000000810000-0x000000000081D000-memory.dmp

                          Filesize

                          52KB

                        • memory/4248-216-0x0000000003570000-0x0000000003580000-memory.dmp

                          Filesize

                          64KB

                        • memory/4248-222-0x0000000003710000-0x0000000003720000-memory.dmp

                          Filesize

                          64KB