Analysis

  • max time kernel
    146s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17/12/2022, 08:54

General

  • Target
    DRAFT199849-BILADING-8458886.exe
  • Size 1.5MB
  • Sample221217-ktwbzagd87
  • SHA256 fa2e0066a72e409c12bb2f71eb282d8feb9cf7a956ed51a22a69c4a43c7a9dba
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • wshrat

C2
  • http://newmoney2033.duckdns.org:5000

Signatures

  • WSHRAT

    WSHRAT is a variant of Houdini worm and has vbs and js variants.

  • WSHRAT payload 5 IoCs
  • Blocklisted process makes network request 15 IoCs
  • Executes dropped EXE 5 IoCs
  • Checks computer location settings 2 TTPs 10 IoCs

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

  • Drops startup file 3 IoCs
  • Adds Run key to start application 2 TTPs 16 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Modifies registry class 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 30 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\DRAFT199849-BILADING-8458886.exe
    "C:\Users\Admin\AppData\Local\Temp\DRAFT199849-BILADING-8458886.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3556
    • C:\Windows\SysWOW64\wscript.exe
      "C:\Windows\System32\wscript.exe" incve-kbktrxnm.docx.vbe
      2⤵
      • Checks computer location settings
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:2656
      • C:\Users\Admin\AppData\Local\Temp\6_71\lemt.exe
        "C:\Users\Admin\AppData\Local\Temp\6_71\lemt.exe" cwrv.xml
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Adds Run key to start application
        • Suspicious use of SetThreadContext
        • Modifies registry class
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:4764
        • C:\Windows\SysWOW64\mshta.exe
          "C:\Windows\SysWOW64\mshta.exe"
          4⤵
            PID:4560
          • C:\Windows\SysWOW64\mshta.exe
            "C:\Windows\SysWOW64\mshta.exe"
            4⤵
              PID:2744
            • C:\Windows\SysWOW64\mshta.exe
              "C:\Windows\SysWOW64\mshta.exe"
              4⤵
                PID:2232
              • C:\Windows\SysWOW64\mshta.exe
                "C:\Windows\SysWOW64\mshta.exe"
                4⤵
                  PID:4360
                • C:\Windows\SysWOW64\mshta.exe
                  "C:\Windows\SysWOW64\mshta.exe"
                  4⤵
                    PID:2432
                  • C:\Windows\SysWOW64\mshta.exe
                    "C:\Windows\SysWOW64\mshta.exe"
                    4⤵
                      PID:4060
                    • C:\Windows\SysWOW64\mshta.exe
                      "C:\Windows\SysWOW64\mshta.exe"
                      4⤵
                        PID:2644
                      • C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
                        "C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe"
                        4⤵
                        • Executes dropped EXE
                        • Checks computer location settings
                        • Suspicious use of WriteProcessMemory
                        PID:3044
                        • C:\Windows\SysWOW64\wscript.exe
                          "C:\Windows\System32\wscript.exe" "C:\Users\Admin\AppData\Roaming\WmBqH.vbs"
                          5⤵
                          • Checks computer location settings
                          • Drops startup file
                          • Adds Run key to start application
                          • Suspicious use of WriteProcessMemory
                          PID:3460
                          • C:\Windows\SysWOW64\wscript.exe
                            "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Local\Temp\WmBqH.vbs"
                            6⤵
                            • Blocklisted process makes network request
                            • Drops startup file
                            • Adds Run key to start application
                            PID:2608
                      • C:\Windows\SysWOW64\WScript.exe
                        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\6_71\run.vbs"
                        4⤵
                        • Checks computer location settings
                        • Modifies registry class
                        • Suspicious use of WriteProcessMemory
                        PID:1284
                        • C:\Users\Admin\AppData\Local\Temp\6_71\lemt.exe
                          "C:\Users\Admin\AppData\Local\Temp\6_71\lemt.exe" cwrv.xml
                          5⤵
                          • Executes dropped EXE
                          • Checks computer location settings
                          • Adds Run key to start application
                          • Suspicious use of SetThreadContext
                          • Modifies registry class
                          • Suspicious behavior: EnumeratesProcesses
                          • Suspicious use of WriteProcessMemory
                          PID:3956
                          • C:\Windows\SysWOW64\mshta.exe
                            "C:\Windows\SysWOW64\mshta.exe"
                            6⤵
                              PID:428
                            • C:\Windows\SysWOW64\mshta.exe
                              "C:\Windows\SysWOW64\mshta.exe"
                              6⤵
                                PID:5004
                              • C:\Windows\SysWOW64\mshta.exe
                                "C:\Windows\SysWOW64\mshta.exe"
                                6⤵
                                  PID:3120
                                • C:\Windows\SysWOW64\mshta.exe
                                  "C:\Windows\SysWOW64\mshta.exe"
                                  6⤵
                                    PID:1372
                                  • C:\Windows\SysWOW64\mshta.exe
                                    "C:\Windows\SysWOW64\mshta.exe"
                                    6⤵
                                      PID:4500
                                    • C:\Windows\SysWOW64\mshta.exe
                                      "C:\Windows\SysWOW64\mshta.exe"
                                      6⤵
                                        PID:1288
                                      • C:\Windows\SysWOW64\mshta.exe
                                        "C:\Windows\SysWOW64\mshta.exe"
                                        6⤵
                                          PID:3928
                                        • C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
                                          "C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe"
                                          6⤵
                                          • Executes dropped EXE
                                          • Checks computer location settings
                                          PID:4812
                                          • C:\Windows\SysWOW64\wscript.exe
                                            "C:\Windows\System32\wscript.exe" "C:\Users\Admin\AppData\Roaming\WmBqH.vbs"
                                            7⤵
                                            • Checks computer location settings
                                            • Drops startup file
                                            • Adds Run key to start application
                                            PID:1080
                                            • C:\Windows\SysWOW64\wscript.exe
                                              "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Local\Temp\WmBqH.vbs"
                                              8⤵
                                                PID:2972
                                          • C:\Windows\SysWOW64\WScript.exe
                                            "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\6_71\run.vbs"
                                            6⤵
                                            • Checks computer location settings
                                            • Modifies registry class
                                            PID:3648
                                            • C:\Users\Admin\AppData\Local\Temp\6_71\lemt.exe
                                              "C:\Users\Admin\AppData\Local\Temp\6_71\lemt.exe" cwrv.xml
                                              7⤵
                                              • Executes dropped EXE
                                              PID:496

                                Network

                                      MITRE ATT&CK Enterprise v6

                                      Replay Monitor

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                                      Downloads

                                      cwrv.xml

                                      • Path C:\Users\Admin\AppData\Local\Temp\6_71\cwrv.xml
                                      • Size 112.5MB
                                      • SHA256 8e96a439e9315097cbc7574e7e03f03a5136b7146b6d3788580855d0546a16e0
                                      • MD5 SHA1 SHA512 SSDEEP

                                      eiqvmdrp.bin

                                      • Path C:\Users\Admin\AppData\Local\Temp\6_71\eiqvmdrp.bin
                                      • Size 61KB
                                      • SHA256 ff4de0f00bfb232f66b0104ddaf71a89237526e3f88fb09f86094b6c037b85a3
                                      • MD5 SHA1 SHA512 SSDEEP

                                      kvuqk.xfd

                                      • Path C:\Users\Admin\AppData\Local\Temp\6_71\kvuqk.xfd
                                      • Size 1.0MB
                                      • SHA256 99e46de7c1acc7c76eee2dccc6128c557a8791b469d457b053a78d6f1ca5d8fe
                                      • MD5 SHA1 SHA512 SSDEEP

                                      lemt.exe

                                      • Path C:\Users\Admin\AppData\Local\Temp\6_71\lemt.exe
                                      • Size 887KB
                                      • SHA256 8c5c8085c2b0ab5afacd633f74583a50cdec8a65036c636b9c84c7f35d48a467
                                      • MD5 SHA1 SHA512 SSDEEP

                                      lemt.exe

                                      • Path C:\Users\Admin\AppData\Local\Temp\6_71\lemt.exe
                                      • Size 887KB
                                      • SHA256 8c5c8085c2b0ab5afacd633f74583a50cdec8a65036c636b9c84c7f35d48a467
                                      • MD5 SHA1 SHA512 SSDEEP

                                      lemt.exe

                                      • Path C:\Users\Admin\AppData\Local\Temp\6_71\lemt.exe
                                      • Size 887KB
                                      • SHA256 8c5c8085c2b0ab5afacd633f74583a50cdec8a65036c636b9c84c7f35d48a467
                                      • MD5 SHA1 SHA512 SSDEEP

                                      lemt.exe

                                      • Path C:\Users\Admin\AppData\Local\Temp\6_71\lemt.exe
                                      • Size 887KB
                                      • SHA256 8c5c8085c2b0ab5afacd633f74583a50cdec8a65036c636b9c84c7f35d48a467
                                      • MD5 SHA1 SHA512 SSDEEP

                                      run.vbs

                                      • Path C:\Users\Admin\AppData\Local\Temp\6_71\run.vbs
                                      • Size 124B
                                      • SHA256 5c0f8f2bd0937fc05578531141412604baf6e405e8e822a6c306ccd52937517b
                                      • MD5 SHA1 SHA512

                                      RegSvcs.exe

                                      • Path C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
                                      • Size 44KB
                                      • SHA256 2c1eeb7097023c784c2bd040a2005a5070ed6f3a4abf13929377a9e39fab1390
                                      • MD5 SHA1 SHA512 SSDEEP

                                      RegSvcs.exe

                                      • Path C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
                                      • Size 44KB
                                      • SHA256 2c1eeb7097023c784c2bd040a2005a5070ed6f3a4abf13929377a9e39fab1390
                                      • MD5 SHA1 SHA512 SSDEEP

                                      RegSvcs.exe

                                      • Path C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
                                      • Size 44KB
                                      • SHA256 2c1eeb7097023c784c2bd040a2005a5070ed6f3a4abf13929377a9e39fab1390
                                      • MD5 SHA1 SHA512 SSDEEP

                                      WmBqH.vbs

                                      • Path C:\Users\Admin\AppData\Local\Temp\WmBqH.vbs
                                      • Size 180KB
                                      • SHA256 40a21327272d9c522a6061a595c640a33780a59a1cab0cc93706bb28a67891b7
                                      • MD5 SHA1 SHA512 SSDEEP

                                      incve-kbktrxnm.docx.vbe

                                      • Path C:\Users\Admin\AppData\Local\temp\6_71\incve-kbktrxnm.docx.vbe
                                      • Size 62KB
                                      • SHA256 003edd78a452744c128714259a7ebba275ea2b287b5c51776a41131db3e5f4a5
                                      • MD5 SHA1 SHA512 SSDEEP

                                      WmBqH.vbs

                                      • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\WmBqH.vbs
                                      • Size 64KB
                                      • SHA256 d98b5fd4eb237919baf53175a6fbe62f71598b22bf0ecad89ff893abe316bd66
                                      • MD5 SHA1 SHA512 SSDEEP

                                      WmBqH.vbs

                                      • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\WmBqH.vbs
                                      • Size 180KB
                                      • SHA256 40a21327272d9c522a6061a595c640a33780a59a1cab0cc93706bb28a67891b7
                                      • MD5 SHA1 SHA512 SSDEEP

                                      WmBqH.vbs

                                      • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\WmBqH.vbs
                                      • Size 180KB
                                      • SHA256 40a21327272d9c522a6061a595c640a33780a59a1cab0cc93706bb28a67891b7
                                      • MD5 SHA1 SHA512 SSDEEP

                                      WmBqH.vbs

                                      • Path C:\Users\Admin\AppData\Roaming\WmBqH.vbs
                                      • Size 180KB
                                      • SHA256 40a21327272d9c522a6061a595c640a33780a59a1cab0cc93706bb28a67891b7
                                      • MD5 SHA1 SHA512 SSDEEP

                                      memory/3044-151-0x0000000000C00000-0x0000000000C8A000-memory.dmp

                                      memory/3044-148-0x0000000000C00000-0x00000000010DC000-memory.dmp

                                      memory/4812-169-0x0000000000F00000-0x0000000001614000-memory.dmp