Analysis

  • max time kernel
    186s
  • max time network
    209s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    31-12-2023 09:23

General

  • Target

    30bbc309dddebd1a5640668ecb389849.exe

  • Size

    700KB

  • MD5

    30bbc309dddebd1a5640668ecb389849

  • SHA1

    73024487befa71389c4644c1c468dc0bdc4d6d30

  • SHA256

    a5eb4c027297ecaf9bf022f9c77b743fbe5515d8802c285e5bf1d3c163cd53f2

  • SHA512

    8c7d2ff517127db305e0fcb4366ae11439212c7363c6a6089efa17d2d1b8d48dd98a77393b6e26a05db2e91f6fbed1d736d2326b8286508efa887c7548a6c60b

  • SSDEEP

    12288:i0AoEJrM2OEX+67rqc8oXNhMt/YmdXtyiWxJV1qf0uEAkF1pfxjG3uQNI1S:MxJMgze0ukPJC/CS

Malware Config

Signatures

  • ISR Stealer

    ISR Stealer is a modified version of Hackhound Stealer written in visual basic.

  • ISR Stealer payload 1 IoCs
  • Modifies firewall policy service 2 TTPs 8 IoCs
  • Adds policy Run key to start application 2 TTPs 2 IoCs
  • Modifies Installed Components in the registry 2 TTPs 4 IoCs
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 6 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • UPX packed file 13 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry key 1 TTPs 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 36 IoCs
  • Suspicious use of SetWindowsHookEx 8 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\30bbc309dddebd1a5640668ecb389849.exe
    "C:\Users\Admin\AppData\Local\Temp\30bbc309dddebd1a5640668ecb389849.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2768
    • C:\Users\Admin\AppData\Local\Temp\30bbc309dddebd1a5640668ecb389849.exe
      "C:\Users\Admin\AppData\Local\Temp\30bbc309dddebd1a5640668ecb389849.exe"
      2⤵
      • Loads dropped DLL
      • Writes to the Master Boot Record (MBR)
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2660
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Users\Admin\AppData\Local\Temp\desktop.bat" "
        3⤵
          PID:1652
        • C:\Users\Admin\AppData\Local\Temp\Server-mine.exe
          "C:\Users\Admin\AppData\Local\Temp\Server-mine.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of SetWindowsHookEx
          PID:2920
        • C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe
          "C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe"
          3⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of SetThreadContext
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2792
          • C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe
            "C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe"
            4⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Writes to the Master Boot Record (MBR)
            • Suspicious use of SetThreadContext
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:1160
            • C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe
              "C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe"
              5⤵
              • Adds policy Run key to start application
              • Modifies Installed Components in the registry
              • Executes dropped EXE
              • Adds Run key to start application
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:268
              • C:\Windows\SysWOW64\cmd.exe
                cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
                6⤵
                • Suspicious use of WriteProcessMemory
                PID:1588
                • C:\Windows\SysWOW64\reg.exe
                  REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
                  7⤵
                  • Modifies firewall policy service
                  • Modifies registry key
                  PID:1664
              • C:\Windows\SysWOW64\cmd.exe
                cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe:*:Enabled:Windows Messanger" /f
                6⤵
                  PID:1336
                  • C:\Windows\SysWOW64\reg.exe
                    REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe:*:Enabled:Windows Messanger" /f
                    7⤵
                    • Modifies firewall policy service
                    • Modifies registry key
                    PID:2256
                • C:\Windows\SysWOW64\cmd.exe
                  cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
                  6⤵
                  • Suspicious use of WriteProcessMemory
                  PID:2072
                  • C:\Windows\SysWOW64\reg.exe
                    REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
                    7⤵
                    • Modifies firewall policy service
                    • Modifies registry key
                    PID:1684
                • C:\Windows\SysWOW64\cmd.exe
                  cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\WinUpdates.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\WinUpdates.exe:*:Enabled:Windows Messanger" /f
                  6⤵
                  • Suspicious use of WriteProcessMemory
                  PID:3008
                  • C:\Windows\SysWOW64\reg.exe
                    REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\WinUpdates.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\WinUpdates.exe:*:Enabled:Windows Messanger" /f
                    7⤵
                    • Modifies firewall policy service
                    • Modifies registry key
                    PID:2364

      Network

      MITRE ATT&CK Matrix ATT&CK v13

      Persistence

      Create or Modify System Process

      1
      T1543

      Windows Service

      1
      T1543.003

      Boot or Logon Autostart Execution

      3
      T1547

      Registry Run Keys / Startup Folder

      3
      T1547.001

      Pre-OS Boot

      1
      T1542

      Bootkit

      1
      T1542.003

      Privilege Escalation

      Create or Modify System Process

      1
      T1543

      Windows Service

      1
      T1543.003

      Boot or Logon Autostart Execution

      3
      T1547

      Registry Run Keys / Startup Folder

      3
      T1547.001

      Defense Evasion

      Modify Registry

      5
      T1112

      Pre-OS Boot

      1
      T1542

      Bootkit

      1
      T1542.003

      Credential Access

      Unsecured Credentials

      2
      T1552

      Credentials In Files

      2
      T1552.001

      Discovery

      System Information Discovery

      1
      T1082

      Collection

      Data from Local System

      2
      T1005

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\5r5hN2.exe
        Filesize

        256KB

        MD5

        6f5830ab28e9c8320b3ea080d3a91554

        SHA1

        6fe834ba23313c927932a4a559066163bc3726e2

        SHA256

        0cc0c4fbba2d07a98e9b39c7cf44a66f83bea5d99f852e15a084a204cb301db5

        SHA512

        061c0419d41abd6377012b3a9a38c1b91b595b8ae6c576daf458abe4f1fb62a53a16cac6aa8bf559829f6bb1911b96214780fe34dfdf66d8cc9888781b8a8433

      • C:\Users\Admin\AppData\Local\Temp\desktop.bat
        Filesize

        378B

        MD5

        67f23640e9351a83d05971c9659d3ded

        SHA1

        1d75868da9e44dee0b3d8511bfefc1a243534d6c

        SHA256

        6aeebb9e693bb77776ab8f139bca5571929dd5211ceaea5f6619fdb9832d0aa1

        SHA512

        14f49e0ed06344e260f12bb0b0a0ee58dccb5a3b7ea5b0a432ae222a1e2f7a69f69df2167e3423cf6eab503578ef397a838414e8bb96c8b04531215e22427d63

      • \Users\Admin\AppData\Local\Temp\5r5hN2.exe
        Filesize

        392KB

        MD5

        38447f942740fd09c3a3e18e4ade7d1c

        SHA1

        5c0844bc2d4cb91e9794892bab28babd7d05d99a

        SHA256

        b0d7644176587f768eb05ac73b507fe4f6cf7f4d5056a308a10ce180e649bbcb

        SHA512

        9f3409f6c5383b186a5b9edf44748380035706485509e9196e1b094e9f5ca0fa071c3215def7aa16d58d003958eefbac00cbfa4adff9fa055c142c038be07004

      • \Users\Admin\AppData\Local\Temp\5r5hN2.exe
        Filesize

        334KB

        MD5

        1d52783a1717a9c3a09a747badf6ac34

        SHA1

        16a6fad8ce09756edb73408b1f9d9e5335253f7c

        SHA256

        d035e4d878c997ce52f4376c792c16dbe087421b40837bc768a547005cb441b2

        SHA512

        9cf3cd7714f43c828284e47ccec184bf57e204fa78831178da49e9c8ee4cf1c416499a564ddb386d52dbb37c91d827ab741f52caf62d09e6e49945feff848ec4

      • \Users\Admin\AppData\Local\Temp\Server-mine.exe
        Filesize

        76KB

        MD5

        f9f2d37a8253d0f4a59cab3287ccb543

        SHA1

        4b42c0c1205f3a3403afbdd21ce95f14e18d8ced

        SHA256

        af9c1ce49667e314c89a947b35555173a2eb72b3293670217665e2b940bb65ea

        SHA512

        a4c12f4d1099c8f4fafacde4a3c8de8136be948a1547decc25b17d4d8de24be4693f6db60fd41ffe1f24cf21779bb7ec7f2d6c2b13c2acd52b8dace09427c569

      • memory/268-95-0x0000000076DB0000-0x0000000076E50000-memory.dmp
        Filesize

        640KB

      • memory/268-94-0x0000000076DB0000-0x0000000076E50000-memory.dmp
        Filesize

        640KB

      • memory/268-107-0x0000000000400000-0x0000000000473000-memory.dmp
        Filesize

        460KB

      • memory/268-103-0x0000000000400000-0x0000000000473000-memory.dmp
        Filesize

        460KB

      • memory/268-102-0x0000000000400000-0x0000000000473000-memory.dmp
        Filesize

        460KB

      • memory/268-101-0x0000000000400000-0x0000000000473000-memory.dmp
        Filesize

        460KB

      • memory/268-99-0x00000000759B0000-0x0000000075AC0000-memory.dmp
        Filesize

        1.1MB

      • memory/268-98-0x0000000000400000-0x0000000000473000-memory.dmp
        Filesize

        460KB

      • memory/268-97-0x0000000000400000-0x0000000000473000-memory.dmp
        Filesize

        460KB

      • memory/268-82-0x0000000000400000-0x0000000000473000-memory.dmp
        Filesize

        460KB

      • memory/268-96-0x0000000077A91000-0x0000000077A92000-memory.dmp
        Filesize

        4KB

      • memory/268-92-0x0000000000400000-0x0000000000473000-memory.dmp
        Filesize

        460KB

      • memory/268-72-0x0000000000400000-0x0000000000473000-memory.dmp
        Filesize

        460KB

      • memory/268-91-0x00000000759B0000-0x0000000075AC0000-memory.dmp
        Filesize

        1.1MB

      • memory/268-74-0x0000000000400000-0x0000000000473000-memory.dmp
        Filesize

        460KB

      • memory/268-83-0x0000000000400000-0x0000000000473000-memory.dmp
        Filesize

        460KB

      • memory/268-75-0x0000000000400000-0x0000000000473000-memory.dmp
        Filesize

        460KB

      • memory/268-78-0x0000000000400000-0x0000000000473000-memory.dmp
        Filesize

        460KB

      • memory/268-81-0x0000000000400000-0x0000000000473000-memory.dmp
        Filesize

        460KB

      • memory/1160-58-0x0000000000400000-0x0000000000434000-memory.dmp
        Filesize

        208KB

      • memory/1160-64-0x0000000000400000-0x0000000000434000-memory.dmp
        Filesize

        208KB

      • memory/1160-54-0x0000000000400000-0x0000000000434000-memory.dmp
        Filesize

        208KB

      • memory/1160-87-0x0000000000400000-0x0000000000434000-memory.dmp
        Filesize

        208KB

      • memory/1160-70-0x0000000000400000-0x0000000000434000-memory.dmp
        Filesize

        208KB

      • memory/1160-67-0x0000000000400000-0x0000000000434000-memory.dmp
        Filesize

        208KB

      • memory/1160-56-0x0000000000400000-0x0000000000434000-memory.dmp
        Filesize

        208KB

      • memory/2660-3-0x0000000000400000-0x0000000000480000-memory.dmp
        Filesize

        512KB

      • memory/2660-13-0x0000000000400000-0x0000000000480000-memory.dmp
        Filesize

        512KB

      • memory/2660-5-0x0000000000400000-0x0000000000480000-memory.dmp
        Filesize

        512KB

      • memory/2660-46-0x0000000000400000-0x0000000000480000-memory.dmp
        Filesize

        512KB

      • memory/2660-7-0x0000000000400000-0x0000000000480000-memory.dmp
        Filesize

        512KB

      • memory/2660-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2660-15-0x0000000000400000-0x0000000000480000-memory.dmp
        Filesize

        512KB

      • memory/2768-0-0x0000000000400000-0x00000000004AF000-memory.dmp
        Filesize

        700KB

      • memory/2792-45-0x0000000000400000-0x0000000000462000-memory.dmp
        Filesize

        392KB