Analysis

  • max time kernel
    151s
  • max time network
    41s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    29-10-2022 00:33

General

  • Target

    6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe

  • Size

    497KB

  • MD5

    d6c276c413f1fe6213b92c21e8fb7085

  • SHA1

    2d991d11879b6ee17db772e6d3f4eeab41f30d30

  • SHA256

    6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7

  • SHA512

    1f9723277c594f12aba942566eb57b653ffe1837482bc37645e11e0042b0a3275e5984f66abb6b51e885964f446aabdd785ab80a4f0f9f93f803bd3c3fcba6f2

  • SSDEEP

    12288:I4/almoWQ9H+3n3yGVcRmrp8sfA1vIgMlfNn3jGv2/:NyhO9VcuisfA1vIVF3R/

Malware Config

Signatures

  • ISR Stealer

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

  • ISR Stealer payload 8 IoCs
  • NirSoft MailPassView 5 IoCs

    Password recovery tool for various email clients

  • Nirsoft 5 IoCs
  • Executes dropped EXE 3 IoCs
  • UPX packed file 16 IoCs

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

  • 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.

  • Accesses Microsoft Outlook accounts 1 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 6 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe
    "C:\Users\Admin\AppData\Local\Temp\6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1612
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c copy "C:\Users\Admin\AppData\Local\Temp\6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\dnsmon.exe"
      2⤵
        PID:1528
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
        2⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1376
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
          /scomma "C:\Users\Admin\AppData\Local\Temp\qf2pPlgSDZ.ini"
          3⤵
            PID:1212
          • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
            /scomma "C:\Users\Admin\AppData\Local\Temp\lqMV8WEStc.ini"
            3⤵
            • Accesses Microsoft Outlook accounts
            PID:1812
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe"
          2⤵
          • Loads dropped DLL
          • Suspicious use of WriteProcessMemory
          PID:612
          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe
            "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe"
            3⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:1720
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows" /v "Load" /d "cmd /c C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe" /f
              4⤵
              • Suspicious use of WriteProcessMemory
              PID:1464
              • C:\Windows\SysWOW64\reg.exe
                reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows" /v "Load" /d "cmd /c C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe" /f
                5⤵
                  PID:1048
              • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\dnsmon.exe
                "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\dnsmon.exe"
                4⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of WriteProcessMemory
                PID:1988
                • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
                  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
                  5⤵
                  • Suspicious use of SetThreadContext
                  • Suspicious use of SetWindowsHookEx
                  PID:580
                  • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
                    /scomma "C:\Users\Admin\AppData\Local\Temp\2QkpAJTfo7.ini"
                    6⤵
                      PID:1072
                    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
                      /scomma "C:\Users\Admin\AppData\Local\Temp\nRNvSmmk7g.ini"
                      6⤵
                      • Accesses Microsoft Outlook accounts
                      PID:304
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe"
              2⤵
              • Suspicious use of WriteProcessMemory
              PID:820
              • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe
                "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe"
                3⤵
                • Executes dropped EXE
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1480

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Temp\qf2pPlgSDZ.ini

            Filesize

            5B

            MD5

            d1ea279fb5559c020a1b4137dc4de237

            SHA1

            db6f8988af46b56216a6f0daf95ab8c9bdb57400

            SHA256

            fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

            SHA512

            720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\dnsmon.exe

            Filesize

            497KB

            MD5

            d6c276c413f1fe6213b92c21e8fb7085

            SHA1

            2d991d11879b6ee17db772e6d3f4eeab41f30d30

            SHA256

            6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7

            SHA512

            1f9723277c594f12aba942566eb57b653ffe1837482bc37645e11e0042b0a3275e5984f66abb6b51e885964f446aabdd785ab80a4f0f9f93f803bd3c3fcba6f2

          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\dnsmon.exe

            Filesize

            497KB

            MD5

            d6c276c413f1fe6213b92c21e8fb7085

            SHA1

            2d991d11879b6ee17db772e6d3f4eeab41f30d30

            SHA256

            6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7

            SHA512

            1f9723277c594f12aba942566eb57b653ffe1837482bc37645e11e0042b0a3275e5984f66abb6b51e885964f446aabdd785ab80a4f0f9f93f803bd3c3fcba6f2

          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe

            Filesize

            24KB

            MD5

            17f51ab722963d73b5dcd050d06e6d40

            SHA1

            70a1eb538fe961512c74dda727ef185c8eb42884

            SHA256

            e1b1dc86ebe7440828efab389cb9edcfd639463a8ff64742818a84859a7ff417

            SHA512

            041794fb9817e578e3aa00f019ce295b82dc6ee5dd23b49e79785570d3f60c058f6292b1382ff3b0e9999774cb60bc5a76919b4fd79d2bba85ea594d9719ac0d

          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe

            Filesize

            24KB

            MD5

            17f51ab722963d73b5dcd050d06e6d40

            SHA1

            70a1eb538fe961512c74dda727ef185c8eb42884

            SHA256

            e1b1dc86ebe7440828efab389cb9edcfd639463a8ff64742818a84859a7ff417

            SHA512

            041794fb9817e578e3aa00f019ce295b82dc6ee5dd23b49e79785570d3f60c058f6292b1382ff3b0e9999774cb60bc5a76919b4fd79d2bba85ea594d9719ac0d

          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe

            Filesize

            24KB

            MD5

            17f51ab722963d73b5dcd050d06e6d40

            SHA1

            70a1eb538fe961512c74dda727ef185c8eb42884

            SHA256

            e1b1dc86ebe7440828efab389cb9edcfd639463a8ff64742818a84859a7ff417

            SHA512

            041794fb9817e578e3aa00f019ce295b82dc6ee5dd23b49e79785570d3f60c058f6292b1382ff3b0e9999774cb60bc5a76919b4fd79d2bba85ea594d9719ac0d

          • \Users\Admin\AppData\Roaming\Microsoft\Windows\dnsmon.exe

            Filesize

            497KB

            MD5

            d6c276c413f1fe6213b92c21e8fb7085

            SHA1

            2d991d11879b6ee17db772e6d3f4eeab41f30d30

            SHA256

            6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7

            SHA512

            1f9723277c594f12aba942566eb57b653ffe1837482bc37645e11e0042b0a3275e5984f66abb6b51e885964f446aabdd785ab80a4f0f9f93f803bd3c3fcba6f2

          • \Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe

            Filesize

            24KB

            MD5

            17f51ab722963d73b5dcd050d06e6d40

            SHA1

            70a1eb538fe961512c74dda727ef185c8eb42884

            SHA256

            e1b1dc86ebe7440828efab389cb9edcfd639463a8ff64742818a84859a7ff417

            SHA512

            041794fb9817e578e3aa00f019ce295b82dc6ee5dd23b49e79785570d3f60c058f6292b1382ff3b0e9999774cb60bc5a76919b4fd79d2bba85ea594d9719ac0d

          • memory/304-136-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/304-137-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/304-135-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/304-133-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/580-126-0x0000000000400000-0x0000000000442000-memory.dmp

            Filesize

            264KB

          • memory/580-138-0x0000000000400000-0x0000000000442000-memory.dmp

            Filesize

            264KB

          • memory/1212-115-0x0000000000400000-0x0000000000453000-memory.dmp

            Filesize

            332KB

          • memory/1212-86-0x0000000000400000-0x0000000000453000-memory.dmp

            Filesize

            332KB

          • memory/1212-88-0x0000000000400000-0x0000000000453000-memory.dmp

            Filesize

            332KB

          • memory/1212-79-0x0000000000400000-0x0000000000453000-memory.dmp

            Filesize

            332KB

          • memory/1212-85-0x0000000000400000-0x0000000000453000-memory.dmp

            Filesize

            332KB

          • memory/1212-83-0x0000000000400000-0x0000000000453000-memory.dmp

            Filesize

            332KB

          • memory/1376-87-0x0000000000400000-0x0000000000442000-memory.dmp

            Filesize

            264KB

          • memory/1376-58-0x0000000000400000-0x0000000000442000-memory.dmp

            Filesize

            264KB

          • memory/1376-128-0x0000000000400000-0x0000000000442000-memory.dmp

            Filesize

            264KB

          • memory/1376-63-0x0000000000400000-0x0000000000442000-memory.dmp

            Filesize

            264KB

          • memory/1376-61-0x0000000000400000-0x0000000000442000-memory.dmp

            Filesize

            264KB

          • memory/1376-59-0x0000000000400000-0x0000000000442000-memory.dmp

            Filesize

            264KB

          • memory/1480-100-0x00000000748B0000-0x0000000074E5B000-memory.dmp

            Filesize

            5.7MB

          • memory/1480-140-0x00000000748B0000-0x0000000074E5B000-memory.dmp

            Filesize

            5.7MB

          • memory/1612-54-0x0000000076681000-0x0000000076683000-memory.dmp

            Filesize

            8KB

          • memory/1612-56-0x00000000748B0000-0x0000000074E5B000-memory.dmp

            Filesize

            5.7MB

          • memory/1612-55-0x00000000748B0000-0x0000000074E5B000-memory.dmp

            Filesize

            5.7MB

          • memory/1720-95-0x00000000748B0000-0x0000000074E5B000-memory.dmp

            Filesize

            5.7MB

          • memory/1720-73-0x00000000748B0000-0x0000000074E5B000-memory.dmp

            Filesize

            5.7MB

          • memory/1812-125-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/1812-124-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/1812-127-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/1812-123-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/1812-121-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/1812-117-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/1988-94-0x00000000748B0000-0x0000000074E5B000-memory.dmp

            Filesize

            5.7MB

          • memory/1988-139-0x00000000748B0000-0x0000000074E5B000-memory.dmp

            Filesize

            5.7MB