Analysis

  • max time kernel
    153s
  • max time network
    158s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-10-2022 16:03

General

  • Target

    a6a5430736ba8eaa3c03ce85ed5ed0c1a21bb4a98a109e47e2ea2548f421c38f.exe

  • Size

    140KB

  • MD5

    a13006667e96bf28c49e4cb3bb432e1e

  • SHA1

    c189d75796b830154225dacb992d4e81af5eaf7f

  • SHA256

    a6a5430736ba8eaa3c03ce85ed5ed0c1a21bb4a98a109e47e2ea2548f421c38f

  • SHA512

    b403141d42e01dc089536f073a26fd729e7cd59468734f9abaeaf0d496d9211476de6f4d835ff5717b33874804ccb587bc9ac6091b6b66df19ffe2d942a26cd0

  • SSDEEP

    1536:nnMg2OVLjlevyaRLBnLuRgiaUxRIxecePKH5nKLV+K:M0LpeTLlamiaUxRIxecePKQv

Malware Config

Signatures

  • joker

    Joker is an Android malware that targets billing and SMS fraud.

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

    Modifies file attributes to stop it showing in Explorer etc.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Adds Run key to start application 2 TTPs 3 IoCs
  • Enumerates connected drives 3 TTPs 1 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Program Files 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 46 IoCs
  • Modifies Internet Explorer start page 1 TTPs 2 IoCs
  • Modifies registry class 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of WriteProcessMemory 56 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a6a5430736ba8eaa3c03ce85ed5ed0c1a21bb4a98a109e47e2ea2548f421c38f.exe
    "C:\Users\Admin\AppData\Local\Temp\a6a5430736ba8eaa3c03ce85ed5ed0c1a21bb4a98a109e47e2ea2548f421c38f.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:436
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\start_min_bat.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4700
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /K C:\Users\Admin\AppData\Roaming\winzip\1.bat
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:912
        • 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
          • Suspicious use of WriteProcessMemory
          PID:4612
          • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
            "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:4612 CREDAT:17410 /prefetch:2
            5⤵
            • Modifies Internet Explorer settings
            • Suspicious use of SetWindowsHookEx
            PID:4412
        • C:\Windows\SysWOW64\rundll32.exe
          rundll32 syssetup,SetupInfObjectInstallAction DefaultInstall 128 C:\Users\Admin\AppData\Roaming\winzip\1.inf
          4⤵
            PID:4260
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /K C:\Users\Admin\AppData\Roaming\winzip\2.bat
            4⤵
            • Enumerates connected drives
            • Drops file in Program Files directory
            • Suspicious use of WriteProcessMemory
            PID:3044
            • C:\Windows\SysWOW64\reg.exe
              reg add "HKLM\Software\Microsoft\Internet Explorer\Main" /v "Start Page" /d ""http://www.82133.com/?S"" /f
              5⤵
              • Modifies Internet Explorer settings
              • Modifies Internet Explorer start page
              PID:2312
            • C:\Windows\SysWOW64\reg.exe
              reg add "HKCU\Software\Microsoft\Internet Explorer\Main" /v "Start Page" /d ""http://www.82133.com/?S"" /f
              5⤵
              • Modifies Internet Explorer settings
              • Modifies Internet Explorer start page
              PID:3176
            • C:\Windows\SysWOW64\reg.exe
              reg add "HKCU\Software\tmp" /v "key" /d ""http://www.82133.com/?S"" /f
              5⤵
                PID:5092
              • C:\Windows\SysWOW64\reg.exe
                reg add "HKCR\CLSID\{971C5380-92A0-5A69-B3EE-C3002B33309E}" /v "IsShortCut" /d "" /f
                5⤵
                • Modifies registry class
                PID:1588
              • 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\winzip\3.bat""" /f
                5⤵
                • Modifies registry class
                PID:2456
              • C:\Windows\SysWOW64\attrib.exe
                attrib +s +h C:\Users\Admin\AppData\Roaming\winzip\tmp\a.{971C5380-92A0-5A69-B3EE-C3002B33309E}
                5⤵
                • Sets file to hidden
                • Views/modifies file attributes
                PID:1888
              • C:\Windows\SysWOW64\attrib.exe
                attrib +s +h C:\Users\Admin\AppData\Roaming\winzip\tmp
                5⤵
                • Sets file to hidden
                • Views/modifies file attributes
                PID:2252
              • C:\Windows\SysWOW64\rundll32.exe
                rundll32 syssetup,SetupInfObjectInstallAction DefaultInstall 128 C:\Users\Admin\AppData\Roaming\winzip\2.inf
                5⤵
                • Adds Run key to start application
                • Suspicious use of WriteProcessMemory
                PID:4356
                • C:\Windows\SysWOW64\runonce.exe
                  "C:\Windows\system32\runonce.exe" -r
                  6⤵
                  • Checks processor information in registry
                  • Suspicious use of WriteProcessMemory
                  PID:3520
                  • C:\Windows\SysWOW64\grpconv.exe
                    "C:\Windows\System32\grpconv.exe" -o
                    7⤵
                      PID:2396
                • C:\Windows\SysWOW64\rundll32.exe
                  rundll32 D:\VolumeDH\inj.dat,MainLoad
                  5⤵
                    PID:3312
            • C:\Users\Admin\AppData\Local\Temp\inlE9B6.tmp
              C:\Users\Admin\AppData\Local\Temp\inlE9B6.tmp
              2⤵
              • Executes dropped EXE
              PID:4324
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\A6A543~1.EXE > nul
              2⤵
                PID:3688

            Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776

              Filesize

              471B

              MD5

              d3ff0edeee7d1ea5754d8a290ae01189

              SHA1

              253ee24a4776d30bac0aedd7ea213adea6acb6f9

              SHA256

              e2e542a3681c428c021d38e608dffa43da666f6f3c53f623c21dc184639b222b

              SHA512

              ab14449059ae31856026e8d8cb0ec0b4158da0fd19f2a73940a159574a9084ce6a09ac05fb80ef3ab11cd9b1395dce021872215baced48f9e8a0bf7311000db7

            • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776

              Filesize

              434B

              MD5

              c60615f4795e0c08bde66d7c5bd767b3

              SHA1

              c5d42c8413bda643aab85d40351bee95d54d6860

              SHA256

              321803227ba3cfecc6f94e6303b14f20782c99021758b4ccd5852e3247645a33

              SHA512

              ad27de24ca758fce181f0324fd3f2a8c0070cdcb914e2d7771f6bbf0e7763951c6568e55498ef5450b8aaebb0e2e29bcf17cf0716f1a9e1a06c881f2ed18a69f

            • C:\Users\Admin\AppData\Local\Temp\cdf1912.tmp

              Filesize

              1KB

              MD5

              3facc60dceffd752f284e286f4ceeb8a

              SHA1

              667ffb98ff425eeb8e3c4c85e0b9fee75cf76da4

              SHA256

              a0583d0e827c3e2aabdfb4e99d6ce78e06eac265bd85f339559433571853f56d

              SHA512

              26c16fd7d173aca60695d464035f639affbb0dcc74788b9246fa051a2bdcfa886e162014ff0eca751fcb90c84a17ab77bacfda1442249f4cbe6bb334c06ce317

            • C:\Users\Admin\AppData\Local\Temp\inlE9B6.tmp

              Filesize

              57.2MB

              MD5

              1cb7848b8eb06f652134b3b8ddf6e31b

              SHA1

              2749cd24409c31ea86810d8f7e2b77a5e3313a8b

              SHA256

              abbf6b940a5551b2949c8ca17477ee11f4e8cedff4c2aaa662b97867f5fdc93f

              SHA512

              a0574ffb4e2d00004a3c4176440943bff0c813b0465f6f1b3b0ff21c8916abf10d2d1b63a0c1d1dc1e14180bd14166073e92ed615c8d971d0e6aaea51530f86f

            • C:\Users\Admin\AppData\Local\Temp\inlE9B6.tmp

              Filesize

              57.2MB

              MD5

              1cb7848b8eb06f652134b3b8ddf6e31b

              SHA1

              2749cd24409c31ea86810d8f7e2b77a5e3313a8b

              SHA256

              abbf6b940a5551b2949c8ca17477ee11f4e8cedff4c2aaa662b97867f5fdc93f

              SHA512

              a0574ffb4e2d00004a3c4176440943bff0c813b0465f6f1b3b0ff21c8916abf10d2d1b63a0c1d1dc1e14180bd14166073e92ed615c8d971d0e6aaea51530f86f

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

              Filesize

              53B

              MD5

              9b41ad553fc0a87c014049dfede9e7fa

              SHA1

              840b9c356ec59e65d33bae61c439b0abf11663bd

              SHA256

              a4bd6b14aa9694ba74db5503576072036cd232d586b5e3dd3fe3dade84a67b5e

              SHA512

              6de134478cd5052675cf936f3dc92fb823d72fc3d44c66f5d0755691481302f63cfe602dd7b492354487c9c5b692a09a404c1081265bb3676030cb43a64369b8

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

              Filesize

              2KB

              MD5

              68a30985a8b4a1dae5b24721ca5b8269

              SHA1

              78481107bbddcf18ffc4d25a184ec74274241a6b

              SHA256

              fe94352a25ade782ea77db82f1ec849479ebfe4605156142fc3fdfabc507a0cf

              SHA512

              d452182a296a9e202bce81ad0c752b34d4d779cac94bb54a07517936b79a4007127585673c524c75055f15e33c56eef0d26d1c448723a97fe70c15457bae5a24

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

              Filesize

              410B

              MD5

              66a1f0147fed7ddd19e9bb7ff93705c5

              SHA1

              9d803c81ea2195617379b880b227892ba30b0bf6

              SHA256

              4f45ce85e221352f7fe26e04968c7f7267dc24b55cf2b72b929b4c90e48cb764

              SHA512

              cfe51756ddec75d240249980a4d27870d15983add25058e4d0da4d8a3ea11384d4d228d6cbc95091f91e516e1ab4dfb1e315941dbd95bf717d4b31936311d597

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

              Filesize

              3KB

              MD5

              c106ffc420b54a4f0fd331f10657dc66

              SHA1

              8930d5b56358f518bdf5ccca2b4d24f98ce7a03f

              SHA256

              fb8218f8c607ec3a4c4cb6e59ee81a94cf8ff513d0b09565ad456c88a9e7250b

              SHA512

              ee82fb57af0dddf8f1acab855cda151d3eacb8e11b0adc3a81852c1e2d77a566aa630ff5dabd8c7bc92ebe78b6187cc823c8a4a645ca78ee88e2c27483080fbd

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

              Filesize

              247B

              MD5

              bf915cb73f6126d712c727039ad3d5e6

              SHA1

              73ff72a83711c90e45f8bd34505b3284fd2a870b

              SHA256

              3fd8eeaededa0a76d36df51803c01fe328ba110702a625b28c25bc83f6ef5940

              SHA512

              752387b92716e8e5296d24c532f16e17a955c8f02055c9fd66d4ff84c8f140d7f2a43cfbb4ff97bd5ba1eebc7fa0c215a9283a180a9598b1b413730d19db1957

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

              Filesize

              44KB

              MD5

              b4966b2557cc2b94f6df3f71e0e89b17

              SHA1

              097f299c6a5a778cf4413c2fbffb29fee4bc2d2d

              SHA256

              f3ae1b20096f4ab201a71e7d39790b3aab1941edb9dc3c6d55757e3afdef2ff5

              SHA512

              21c572aba7c582e9666e8bcc77988cc1ceb5fdcd2f4147141770f80492a0c91a8654b23179ebb06cdebf85302b180aa6489bc235f7e3126c91d5cfd25b3d2011

            • memory/436-132-0x0000000000400000-0x0000000000423000-memory.dmp

              Filesize

              140KB

            • memory/436-228-0x0000000000400000-0x0000000000423000-memory.dmp

              Filesize

              140KB

            • memory/4612-175-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-150-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-163-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-171-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-159-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-160-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-158-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-174-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-157-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-177-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-178-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-179-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-156-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-181-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-180-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-182-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-154-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-189-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-190-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-153-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-151-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-192-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-165-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-147-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-194-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-196-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-146-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-145-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-203-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-143-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-144-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-206-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-207-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-208-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-209-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-210-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-212-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-141-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-214-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-219-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-220-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-139-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB

            • memory/4612-138-0x00007FF834800000-0x00007FF83486E000-memory.dmp

              Filesize

              440KB