Analysis

  • max time kernel
    142s
  • max time network
    157s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    12-10-2022 17:38

General

  • Target

    2728cd6cf42c15a1ae9821eece617b34dc26bd894c8b4d3d019e5178fa56858b.exe

  • Size

    57KB

  • MD5

    7b8ca67288370184c879fe25f6606282

  • SHA1

    5a65df279f1c91ddddcd0b45d259df6c07be0545

  • SHA256

    2728cd6cf42c15a1ae9821eece617b34dc26bd894c8b4d3d019e5178fa56858b

  • SHA512

    ed6eb89446e10e759021f9c1b34ff9b22e733681f07ad4859b8c59510620800cb1b6acf682ee66e62043346d2f263d9f113911b412ebf2db1a552f6ae4797617

  • SSDEEP

    768:hBRMLJshpXC1tlRiYTqyFN9Mwxgb+qi90sG3gGaru+6o6cAT5LZwmChDkGBh9OHQ:hBFwt8Om/sPruWOLZwmChgGzg+fPVG6T

Score
8/10

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Drops file in Windows directory 2 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 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies Internet Explorer settings 1 TTPs 30 IoCs
  • Modifies Internet Explorer start page 1 TTPs 2 IoCs
  • Modifies registry class 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 15 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2728cd6cf42c15a1ae9821eece617b34dc26bd894c8b4d3d019e5178fa56858b.exe
    "C:\Users\Admin\AppData\Local\Temp\2728cd6cf42c15a1ae9821eece617b34dc26bd894c8b4d3d019e5178fa56858b.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1612
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\teacher2011_check.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1464
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /K C:\Users\Admin\AppData\Roaming\PPLive\1.bat
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2028
        • C:\PROGRA~1\INTERN~1\iexplore.exe
          C:\PROGRA~1\INTERN~1\IEXPLORE.EXE http://WWw.cnkankan.com/?82133
          4⤵
          • Modifies Internet Explorer settings
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SetWindowsHookEx
          PID:1408
          • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
            "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1408 CREDAT:275457 /prefetch:2
            5⤵
            • Modifies Internet Explorer settings
            • Suspicious use of SetWindowsHookEx
            PID:992
        • C:\Windows\SysWOW64\rundll32.exe
          rundll32 syssetup,SetupInfObjectInstallAction DefaultInstall 128 C:\Users\Admin\AppData\Roaming\PPLive\1.inf
          4⤵
          • Drops file in Windows directory
          • Suspicious use of AdjustPrivilegeToken
          PID:1616
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /K C:\Users\Admin\AppData\Roaming\PPLive\2.bat
          4⤵
          • Drops file in Program Files directory
          • Suspicious use of WriteProcessMemory
          PID:1524
          • C:\Windows\SysWOW64\reg.exe
            reg add "HKLM\Software\Microsoft\Internet Explorer\Main" /v "Start Page" /d ""http://www.82133.com/?o"" /f
            5⤵
            • Modifies Internet Explorer settings
            • Modifies Internet Explorer start page
            PID:1396
          • C:\Windows\SysWOW64\reg.exe
            reg add "HKCU\Software\Microsoft\Internet Explorer\Main" /v "Start Page" /d ""http://www.82133.com/?o"" /f
            5⤵
            • Modifies Internet Explorer settings
            • Modifies Internet Explorer start page
            PID:1380
          • C:\Windows\SysWOW64\reg.exe
            reg add "HKCU\Software\tmp" /v "key" /d ""http://www.82133.com/?o"" /f
            5⤵
              PID:1472
            • C:\Windows\SysWOW64\reg.exe
              reg add "HKCR\CLSID\{971C5380-92A0-5A69-B3EE-C3002B33309E}" /v "IsShortCut" /d "" /f
              5⤵
              • Modifies registry class
              PID:2000
            • C:\Windows\SysWOW64\reg.exe
              reg add "HKCR\CLSID\{971C5380-92A0-5A69-B3EE-C3002B33309E}\Shell\open(&H)\Command" /v "" /d "wscript -e:vbs ""C:\Users\Admin\AppData\Roaming\PPLive\3.bat""" /f
              5⤵
              • Modifies registry class
              PID:520
            • C:\Windows\SysWOW64\attrib.exe
              attrib +s +h C:\Users\Admin\AppData\Roaming\PPLive\tmp\a.{971C5380-92A0-5A69-B3EE-C3002B33309E}
              5⤵
              • Sets file to hidden
              • Views/modifies file attributes
              PID:956
            • C:\Windows\SysWOW64\attrib.exe
              attrib +s +h C:\Users\Admin\AppData\Roaming\PPLive\tmp
              5⤵
              • Sets file to hidden
              • Views/modifies file attributes
              PID:1504
            • C:\Windows\SysWOW64\rundll32.exe
              rundll32 syssetup,SetupInfObjectInstallAction DefaultInstall 128 C:\Users\Admin\AppData\Roaming\PPLive\2.inf
              5⤵
              • Adds Run key to start application
              • Drops file in Windows directory
              • Suspicious use of AdjustPrivilegeToken
              PID:712
              • C:\Windows\SysWOW64\runonce.exe
                "C:\Windows\system32\runonce.exe" -r
                6⤵
                • Checks processor information in registry
                PID:1292
                • C:\Windows\SysWOW64\grpconv.exe
                  "C:\Windows\System32\grpconv.exe" -o
                  7⤵
                    PID:1072
              • C:\Windows\SysWOW64\rundll32.exe
                rundll32 D:\VolumeDH\inj.dat,MainLoad
                5⤵
                  PID:268
          • C:\Users\Admin\AppData\Local\Temp\inl3804.tmp
            C:\Users\Admin\AppData\Local\Temp\inl3804.tmp
            2⤵
            • Executes dropped EXE
            PID:2028
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\2728CD~1.EXE > nul
            2⤵
              PID:1908

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • C:\Users\Admin\AppData\Local\Temp\inl3804.tmp

            Filesize

            76.4MB

            MD5

            28fd8a720610b4099afce7c3248a72e6

            SHA1

            cae11e5c07465884c23d7faf090faadaca13797f

            SHA256

            110fa4ace0676580ccb9001cdcf58b2101a97a22315cdb75d9d8bd7e4c7f875d

            SHA512

            837489a1f7f9df33c2f7c193ca670a6d892092159e620e28859d56a635107e638991ac1804fb1d99750998d28840a560c8606df187aa3997095c5172c44853c5

          • C:\Users\Admin\AppData\Local\Temp\teacher2011_check.bat

            Filesize

            53B

            MD5

            23962a245f75fe25510051582203aff1

            SHA1

            20832a3a1179bb2730194d2f7738d41d5d669a43

            SHA256

            1abcea214b9b2bd76cc04be07ae2d4d70371e6ca443d99f4f1327afe7a5fc647

            SHA512

            dc36b64f2dbb710652900a31295c148760b0c44eae13515aa29613916c9dffe3d8e55ba61568f7c27b43bf0c341f7dcd4b9c721f81627fc6bb915b15c358fe80

          • C:\Users\Admin\AppData\Local\Temp\winrar_config.tmp

            Filesize

            660B

            MD5

            c40ea8f677b3f48bfb7f4cfc6d3f03ab

            SHA1

            10b94afd8e6ea98a3c8a955304f9ce660b0c380a

            SHA256

            b1a31a74cc88d0f8e39aaebf58a724b89391dc3fbac733953790edf8ded8172c

            SHA512

            409b8a45576bf08e185446b13a512c115df7483ff8ec30ea51ee93ee1ac8153ae3b615650ff69a5d1e41fa0cd57fcdc4c5d03b4b4453431114ac018f48e194d9

          • C:\Users\Admin\AppData\Roaming\PPLive\1.bat

            Filesize

            3KB

            MD5

            b7c5e3b416b1d1b5541ef44662e1a764

            SHA1

            8bff7ea2be2f3cf29f2381d8007198b5991ca3ae

            SHA256

            f1a2f9fdebb3cac24756e53fa5e1628b2bd1cc130480c1878e3b3bc880575cd1

            SHA512

            65dbd6a7a7cf6fec00e6b0f1d7d5655769e6087ad09cad74c91c5a3395e675ac8f9df5c7185327e6f8dd03ddb60504400f54237d9e4b53c8b08e7e3d41ee61fc

          • C:\Users\Admin\AppData\Roaming\PPLive\1.inf

            Filesize

            492B

            MD5

            34c14b8530e1094e792527f7a474fe77

            SHA1

            f71c4e9091140256b34c18220d1dd1efab1f301d

            SHA256

            fe0dfb3458bfe2a3632d365e00765fa10f14d62e7dfa8b70a055c7eb9fdb6713

            SHA512

            25bb09b526e1e9f5c6052f1f7c36b37c956c1b5649936af8df3abfcf120c931f3d2603e17a061cb99d8c8074bfb1973a5423cce89762fca53cd46aeb3e8944a2

          • C:\Users\Admin\AppData\Roaming\PPLive\2.bat

            Filesize

            3KB

            MD5

            6b78cb8ced798ca5df5612dd62ce0965

            SHA1

            5a9c299393b96b0bf8f6770e3c7b0318a9e2e0cf

            SHA256

            81f64f42edfac2863a55db8fabd528c4eefc67f7e658cad6a57eeec862e444e3

            SHA512

            b387ba10021f3284d1406d520a2c8b3ba0c87922d67c79394c1aa50c631194519ac6bb5b898956533f040d48e1c7b202734e0075f8fc8c8bfab82c8ef359b28e

          • C:\Users\Admin\AppData\Roaming\PPLive\2.inf

            Filesize

            247B

            MD5

            ca436f6f187bc049f9271ecdcbf348fa

            SHA1

            bf8a548071cfc150f7affb802538edf03d281106

            SHA256

            6cdfa9b7f0e1e4ee16bc8ce5d7448d47ea8866c1f55f3e56be5c2a4d183ca534

            SHA512

            d19e20aabddad6b0284f8c1d473e9180f30b49d4d8b54f26e7c8630228e16b1f6ba04023c5e8b1993d8a10d97adcfff683b216f79b9981bf16181641aebdd591

          • C:\Users\Admin\AppData\Roaming\PPLive\4.bat

            Filesize

            12.3MB

            MD5

            2cb0b871bcf3ef42f968af2599a85ffd

            SHA1

            c3a77e3980c5d810619b7e52addf89c06c58d5d7

            SHA256

            18a7683e9cf65d8a0a7209ed1517540c775fc394359928bbc044e0b44b9110f1

            SHA512

            06a1d56540e2e199939efe46906e26d3a04569b948b09a040c56ce685b8d9d55522f27e308e5ca021144600e045835dfadea7d313ceaff98e6e61ffff0be97c3

          • \Users\Admin\AppData\Local\Temp\inl3804.tmp

            Filesize

            76.5MB

            MD5

            1efe9d6c0949e56ab0f5d353b08b3752

            SHA1

            53a12464b4286d57a9ed17bb44dde8de62175f1d

            SHA256

            da7aba1f4d7f8dbe9ff393fe05df9af630e7cc383efdf5c295e65f371154b1d5

            SHA512

            da2e852e9c539f5c8d392c5569763315461bdeedc5441f9c03f449e2407fb3d75e2f3ffa85f4a356c060263d73a51f3174c12d81966dd6591622f2131956e2ca

          • \Users\Admin\AppData\Local\Temp\inl3804.tmp

            Filesize

            73.7MB

            MD5

            c71cd6d74cfea2952cee3e066895d626

            SHA1

            b7852ae4ee841dd4cfa194f03a2d3921db1242b6

            SHA256

            451483cc68d61a2700fdf366563b7202199f3a39fbb662af0607338961c2b37b

            SHA512

            bbae4df7810c3c04788ed8deba774cea4f529844f68fcdeb34c120caba360913a435f9e3b4387801680461113ae67fbf4826bb01376117b54cad2e2340b97d36

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

            Filesize

            8KB

          • memory/1612-61-0x0000000002D70000-0x0000000002D7F000-memory.dmp

            Filesize

            60KB

          • memory/1612-56-0x0000000000020000-0x0000000000023000-memory.dmp

            Filesize

            12KB

          • memory/1612-55-0x0000000000270000-0x0000000000297000-memory.dmp

            Filesize

            156KB

          • memory/1612-92-0x0000000000270000-0x0000000000297000-memory.dmp

            Filesize

            156KB