Resubmissions

12-11-2024 01:29

241112-bwgrxs1gnf 10

08-07-2021 12:18

210708-8z6d5h8z2n 10

06-07-2021 17:53

210706-g6we6sa7sa 10

19-06-2021 18:17

210619-vr8bj2dzfn 10

17-06-2021 21:39

210617-a9cvlnmrbx 10

11-06-2021 17:26

210611-wvab1yw2tj 10

08-06-2021 06:47

210608-qrbpch3y46 10

08-06-2021 06:47

210608-64tndgm1ln 10

05-06-2021 18:40

210605-cd6qpr55sx 10

04-06-2021 11:56

210604-5c416rs3ns 10

Analysis

  • max time kernel
    1800s
  • max time network
    1702s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    05-06-2021 18:40

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 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 49 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:340
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s Schedule
      1⤵
        PID:68
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s UserManager
        1⤵
          PID:1376
        • 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 Themes
            1⤵
              PID:1180
            • 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 ShellHWDetection
                1⤵
                  PID:1908
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
                  1⤵
                    PID:2852
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s WpnService
                    1⤵
                      PID:2836
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s Browser
                      1⤵
                        PID:2756
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
                        1⤵
                          PID:2608
                        • c:\windows\system32\svchost.exe
                          c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
                          1⤵
                          • Suspicious use of AdjustPrivilegeToken
                          PID:2576
                        • 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:800
                          • 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:3828
                            • 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:4040
                          • 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:196
                          • 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:2376
                            • C:\Users\Admin\AppData\Local\Temp\is-1I5MO.tmp\Install.tmp
                              "C:\Users\Admin\AppData\Local\Temp\is-1I5MO.tmp\Install.tmp" /SL5="$401DA,235791,152064,C:\Users\Admin\AppData\Local\Temp\RarSFX0\Install.exe"
                              3⤵
                              • Executes dropped EXE
                              • Loads dropped DLL
                              PID:1636
                          • 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:1928
                            • 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:192
                              • C:\Windows\SysWOW64\PING.EXE
                                ping 127.0.0.1
                                4⤵
                                • Runs ping.exe
                                PID:492
                          • 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:4340
                          • 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:4576
                            • 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:4236
                            • 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:564
                            • 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:788
                            • 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:344
                        • \??\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:1012
                          • 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:3424
                          • 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:804
                        • 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:3156
                        • C:\Windows\system32\browser_broker.exe
                          C:\Windows\system32\browser_broker.exe -Embedding
                          1⤵
                          • Modifies Internet Explorer settings
                          PID:3328
                        • 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:4420
                        • 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:5048
                        • 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:1028
                        • 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: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:4628

                        Network

                        MITRE ATT&CK Enterprise v6

                        Replay Monitor

                        Loading Replay Monitor...

                        Downloads

                        • memory/68-178-0x0000027FAC210000-0x0000027FAC280000-memory.dmp

                          Filesize

                          448KB

                        • memory/68-263-0x0000027FAC940000-0x0000027FAC9B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/196-126-0x0000000000CD0000-0x0000000000CD1000-memory.dmp

                          Filesize

                          4KB

                        • memory/196-165-0x0000000001570000-0x0000000001572000-memory.dmp

                          Filesize

                          8KB

                        • memory/196-131-0x00000000014E0000-0x00000000014FC000-memory.dmp

                          Filesize

                          112KB

                        • memory/196-132-0x0000000001500000-0x0000000001501000-memory.dmp

                          Filesize

                          4KB

                        • memory/196-130-0x00000000012D0000-0x00000000012D1000-memory.dmp

                          Filesize

                          4KB

                        • memory/340-170-0x0000026116740000-0x00000261167B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/340-255-0x0000026116D40000-0x0000026116DB0000-memory.dmp

                          Filesize

                          448KB

                        • memory/804-245-0x000002C36B200000-0x000002C36B305000-memory.dmp

                          Filesize

                          1.0MB

                        • memory/804-211-0x000002C368C40000-0x000002C368CB0000-memory.dmp

                          Filesize

                          448KB

                        • memory/804-209-0x000002C368990000-0x000002C3689DB000-memory.dmp

                          Filesize

                          300KB

                        • memory/804-246-0x000002C36A4B0000-0x000002C36A4CB000-memory.dmp

                          Filesize

                          108KB

                        • memory/1012-162-0x0000016F8C000000-0x0000016F8C04B000-memory.dmp

                          Filesize

                          300KB

                        • memory/1012-134-0x0000016F8BF20000-0x0000016F8BF22000-memory.dmp

                          Filesize

                          8KB

                        • memory/1012-163-0x0000016F8C2C0000-0x0000016F8C330000-memory.dmp

                          Filesize

                          448KB

                        • memory/1096-176-0x0000029F00770000-0x0000029F007E0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1096-261-0x0000029F01440000-0x0000029F014B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1180-269-0x0000026035020000-0x0000026035090000-memory.dmp

                          Filesize

                          448KB

                        • memory/1180-184-0x0000026034FB0000-0x0000026035020000-memory.dmp

                          Filesize

                          448KB

                        • memory/1376-271-0x000002AD6F820000-0x000002AD6F890000-memory.dmp

                          Filesize

                          448KB

                        • memory/1376-186-0x000002AD6F400000-0x000002AD6F470000-memory.dmp

                          Filesize

                          448KB

                        • memory/1428-265-0x000001F56A2E0000-0x000001F56A350000-memory.dmp

                          Filesize

                          448KB

                        • memory/1428-180-0x000001F56A200000-0x000001F56A270000-memory.dmp

                          Filesize

                          448KB

                        • memory/1636-199-0x00000000001E0000-0x00000000001E1000-memory.dmp

                          Filesize

                          4KB

                        • memory/1908-267-0x000001430C530000-0x000001430C5A0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1908-182-0x000001430C400000-0x000001430C470000-memory.dmp

                          Filesize

                          448KB

                        • memory/1928-203-0x0000000001270000-0x000000000127D000-memory.dmp

                          Filesize

                          52KB

                        • memory/2376-193-0x0000000000400000-0x000000000042B000-memory.dmp

                          Filesize

                          172KB

                        • memory/2576-259-0x00000154C8740000-0x00000154C87B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2576-174-0x00000154C7CD0000-0x00000154C7D40000-memory.dmp

                          Filesize

                          448KB

                        • memory/2608-172-0x000002209B490000-0x000002209B500000-memory.dmp

                          Filesize

                          448KB

                        • memory/2608-257-0x000002209BB00000-0x000002209BB70000-memory.dmp

                          Filesize

                          448KB

                        • memory/2756-167-0x0000028AEBFA0000-0x0000028AEC010000-memory.dmp

                          Filesize

                          448KB

                        • memory/2756-253-0x0000028AEC540000-0x0000028AEC5B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2836-275-0x000001B333AB0000-0x000001B333B20000-memory.dmp

                          Filesize

                          448KB

                        • memory/2836-190-0x000001B333A40000-0x000001B333AB0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2852-188-0x000001D2CBB40000-0x000001D2CBBB0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2852-273-0x000001D2CC0A0000-0x000001D2CC110000-memory.dmp

                          Filesize

                          448KB

                        • memory/3424-168-0x00000248BDD40000-0x00000248BDDB0000-memory.dmp

                          Filesize

                          448KB

                        • memory/4040-129-0x0000000004500000-0x000000000455C000-memory.dmp

                          Filesize

                          368KB

                        • memory/4040-128-0x000000000439C000-0x000000000449D000-memory.dmp

                          Filesize

                          1.0MB

                        • memory/4340-221-0x0000000003850000-0x0000000003860000-memory.dmp

                          Filesize

                          64KB

                        • memory/4340-215-0x00000000036B0000-0x00000000036C0000-memory.dmp

                          Filesize

                          64KB