Analysis

  • max time kernel
    183s
  • max time network
    221s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    12-10-2023 12:11

General

  • Target

    aee43496026aadd3bb0884c7fcd200758fde8c35940f0745628f4a0f480923c0_JC.rtf

  • Size

    92KB

  • MD5

    87dc64cd0d2d13f4897619c008540bcb

  • SHA1

    7f191350095893ebc3e1aa0e9e79dc083961e697

  • SHA256

    aee43496026aadd3bb0884c7fcd200758fde8c35940f0745628f4a0f480923c0

  • SHA512

    09e5d4f84ee2da4306cd4ddc97bebec6071b075e236ef861149daf30ae156d7e0b6f6882926eb7e0f841988424e07d283f505d9de4d91955e1f305961b05b755

  • SSDEEP

    768:ewAbZSibMX9gRWjFrOxpo0gcdOSY04ttpVtocQWILLIYGYsTqcmtDU9YHL:ewAlRQKxmidnY04ttpXoeyhGYsVmtYUL

Malware Config

Extracted

Family

xpertrat

Version

3.0.10

Botnet

STRIGIO

C2

sandshoe.myfirewall.org:5344

Mutex

I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4

Signatures

  • UAC bypass 3 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 1 IoCs
  • XpertRAT

    XpertRAT is a remote access trojan with various capabilities.

  • XpertRAT Core payload 1 IoCs
  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 3 IoCs
  • Adds policy Run key to start application 2 TTPs 2 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • UPX packed file 2 IoCs

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

  • Windows security modification 2 TTPs 1 IoCs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 8 IoCs
  • Drops file in Windows directory 1 IoCs
  • Office loads VBA resources, possible macro or embedded object present
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\aee43496026aadd3bb0884c7fcd200758fde8c35940f0745628f4a0f480923c0_JC.rtf"
    1⤵
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2688
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1184
    • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
      "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
      1⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Launches Equation Editor
      • Suspicious use of WriteProcessMemory
      PID:2772
      • C:\Users\Admin\AppData\Roaming\sandshoebnf5783.exe
        "C:\Users\Admin\AppData\Roaming\sandshoebnf5783.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2488
        • C:\Users\Admin\AppData\Roaming\sandshoebnf5783.exe
          "C:\Users\Admin\AppData\Roaming\sandshoebnf5783.exe"
          3⤵
          • UAC bypass
          • Windows security bypass
          • Executes dropped EXE
          • Windows security modification
          • Checks whether UAC is enabled
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          • System policy modification
          PID:2016
          • C:\Program Files (x86)\Internet Explorer\iexplore.exe
            C:\Users\Admin\AppData\Roaming\sandshoebnf5783.exe
            4⤵
              PID:876
            • C:\Program Files (x86)\Internet Explorer\iexplore.exe
              C:\Users\Admin\AppData\Roaming\sandshoebnf5783.exe
              4⤵
              • Adds policy Run key to start application
              • Adds Run key to start application
              • Suspicious use of SetThreadContext
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:2280
              • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\vgimnyelg0.txt"
                5⤵
                • Suspicious use of AdjustPrivilegeToken
                PID:2268
              • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\vgimnyelg1.txt"
                5⤵
                • Accesses Microsoft Outlook accounts
                PID:1852
              • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\vgimnyelg2.txt"
                5⤵
                • Suspicious behavior: EnumeratesProcesses
                PID:996
              • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\vgimnyelg3.txt"
                5⤵
                  PID:568
                • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                  /stext "C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\vgimnyelg4.txt"
                  5⤵
                    PID:2056

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\vgimnyelg2.txt

            Filesize

            2B

            MD5

            f3b25701fe362ec84616a93a45ce9998

            SHA1

            d62636d8caec13f04e28442a0a6fa1afeb024bbb

            SHA256

            b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

            SHA512

            98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

          • C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\vgimnyelg2.txt

            Filesize

            2B

            MD5

            f3b25701fe362ec84616a93a45ce9998

            SHA1

            d62636d8caec13f04e28442a0a6fa1afeb024bbb

            SHA256

            b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

            SHA512

            98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

          • C:\Users\Admin\AppData\Roaming\I8N3F0X7-G4E2-P2S0-T0D7-R1N2H5T660I4\vgimnyelg4.txt

            Filesize

            2B

            MD5

            f3b25701fe362ec84616a93a45ce9998

            SHA1

            d62636d8caec13f04e28442a0a6fa1afeb024bbb

            SHA256

            b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

            SHA512

            98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

          • C:\Users\Admin\AppData\Roaming\Microsoft\Templates\Normal.dotm

            Filesize

            20KB

            MD5

            845f4c71d9d06bea2ae5f1f20a37443e

            SHA1

            209965ea843e42ccf12a11d63602be229ab53a7a

            SHA256

            9a0a43a2fb58214e56df74a0bb910b13c6cf479b1b54c726571d0ba7bf8e4b1c

            SHA512

            90b34763e675bc8e818c5ca86807ffa11c7dd20c662dcd25927f48ee1a08cad047f29085a09e0e471b930a68e78dfab0964570e02c5513d654bc560ae7c18740

          • C:\Users\Admin\AppData\Roaming\sandshoebnf5783.exe

            Filesize

            510KB

            MD5

            2cb0027810b1ef32a2756804027c3436

            SHA1

            56f8636adbf50d1265319f08d6872daff2b75815

            SHA256

            c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46

            SHA512

            6d805f59561eb3dd70f8c74d16439c767b58f67dffe0104decf662616c302de04e8795e67ba287b1837062a6ef6379961c915c0f29e70a8bb8bbdc85dd26a09d

          • C:\Users\Admin\AppData\Roaming\sandshoebnf5783.exe

            Filesize

            510KB

            MD5

            2cb0027810b1ef32a2756804027c3436

            SHA1

            56f8636adbf50d1265319f08d6872daff2b75815

            SHA256

            c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46

            SHA512

            6d805f59561eb3dd70f8c74d16439c767b58f67dffe0104decf662616c302de04e8795e67ba287b1837062a6ef6379961c915c0f29e70a8bb8bbdc85dd26a09d

          • C:\Users\Admin\AppData\Roaming\sandshoebnf5783.exe

            Filesize

            510KB

            MD5

            2cb0027810b1ef32a2756804027c3436

            SHA1

            56f8636adbf50d1265319f08d6872daff2b75815

            SHA256

            c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46

            SHA512

            6d805f59561eb3dd70f8c74d16439c767b58f67dffe0104decf662616c302de04e8795e67ba287b1837062a6ef6379961c915c0f29e70a8bb8bbdc85dd26a09d

          • C:\Users\Admin\AppData\Roaming\sandshoebnf5783.exe

            Filesize

            510KB

            MD5

            2cb0027810b1ef32a2756804027c3436

            SHA1

            56f8636adbf50d1265319f08d6872daff2b75815

            SHA256

            c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46

            SHA512

            6d805f59561eb3dd70f8c74d16439c767b58f67dffe0104decf662616c302de04e8795e67ba287b1837062a6ef6379961c915c0f29e70a8bb8bbdc85dd26a09d

          • \Users\Admin\AppData\Roaming\sandshoebnf5783.exe

            Filesize

            510KB

            MD5

            2cb0027810b1ef32a2756804027c3436

            SHA1

            56f8636adbf50d1265319f08d6872daff2b75815

            SHA256

            c24566c0745944cbc188bca73f43e78f9824a22f05089665e6e09f01294f5c46

            SHA512

            6d805f59561eb3dd70f8c74d16439c767b58f67dffe0104decf662616c302de04e8795e67ba287b1837062a6ef6379961c915c0f29e70a8bb8bbdc85dd26a09d

          • memory/568-88-0x0000000000400000-0x0000000000416000-memory.dmp

            Filesize

            88KB

          • memory/996-82-0x0000000000400000-0x0000000000459000-memory.dmp

            Filesize

            356KB

          • memory/1852-62-0x0000000000400000-0x000000000041B000-memory.dmp

            Filesize

            108KB

          • memory/2016-57-0x0000000000400000-0x000000000042C000-memory.dmp

            Filesize

            176KB

          • memory/2016-46-0x0000000000400000-0x000000000042C000-memory.dmp

            Filesize

            176KB

          • memory/2016-36-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

            Filesize

            4KB

          • memory/2016-38-0x0000000000400000-0x000000000042C000-memory.dmp

            Filesize

            176KB

          • memory/2016-30-0x0000000000400000-0x000000000042C000-memory.dmp

            Filesize

            176KB

          • memory/2016-34-0x0000000000400000-0x000000000042C000-memory.dmp

            Filesize

            176KB

          • memory/2016-32-0x0000000000400000-0x000000000042C000-memory.dmp

            Filesize

            176KB

          • memory/2056-89-0x0000000000400000-0x0000000000415000-memory.dmp

            Filesize

            84KB

          • memory/2268-61-0x0000000000400000-0x0000000000426000-memory.dmp

            Filesize

            152KB

          • memory/2280-47-0x0000000000400000-0x0000000000443000-memory.dmp

            Filesize

            268KB

          • memory/2488-17-0x0000000004E60000-0x0000000004EA0000-memory.dmp

            Filesize

            256KB

          • memory/2488-18-0x0000000000510000-0x0000000000522000-memory.dmp

            Filesize

            72KB

          • memory/2488-26-0x0000000000630000-0x0000000000638000-memory.dmp

            Filesize

            32KB

          • memory/2488-27-0x0000000000640000-0x000000000064C000-memory.dmp

            Filesize

            48KB

          • memory/2488-14-0x0000000000FE0000-0x0000000001066000-memory.dmp

            Filesize

            536KB

          • memory/2488-15-0x000000006B2E0000-0x000000006B9CE000-memory.dmp

            Filesize

            6.9MB

          • memory/2488-41-0x000000006B2E0000-0x000000006B9CE000-memory.dmp

            Filesize

            6.9MB

          • memory/2488-24-0x000000006B2E0000-0x000000006B9CE000-memory.dmp

            Filesize

            6.9MB

          • memory/2488-25-0x0000000004E60000-0x0000000004EA0000-memory.dmp

            Filesize

            256KB

          • memory/2488-29-0x0000000005080000-0x00000000050EA000-memory.dmp

            Filesize

            424KB

          • memory/2688-23-0x000000007116D000-0x0000000071178000-memory.dmp

            Filesize

            44KB

          • memory/2688-81-0x000000007116D000-0x0000000071178000-memory.dmp

            Filesize

            44KB

          • memory/2688-0-0x000000002FED1000-0x000000002FED2000-memory.dmp

            Filesize

            4KB

          • memory/2688-80-0x000000005FFF0000-0x0000000060000000-memory.dmp

            Filesize

            64KB

          • memory/2688-2-0x000000007116D000-0x0000000071178000-memory.dmp

            Filesize

            44KB

          • memory/2688-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

            Filesize

            64KB