Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-10-2022 17:11

General

  • Target

    c4a5e384abb8dceaf659da7a4092dd902500ce48c3ed2a5bd4d948f4e5ee4810.exe

  • Size

    48KB

  • MD5

    781e01e1551af4492540bb73cab1582b

  • SHA1

    545cea75865e465b114306c7d6fc2cf79c5119aa

  • SHA256

    c4a5e384abb8dceaf659da7a4092dd902500ce48c3ed2a5bd4d948f4e5ee4810

  • SHA512

    86bc09d63983ee8c01c9dfca85bc7986c47f631f3c17a3b322df51cc66fe252807552baf2b8d4527bd56ce55934027f41cff6c13b0d566aeaa4160e7b1440f00

  • SSDEEP

    768:5RVZwlepBH12mX3uN3aO74s9dcKDI0GZTg70Wq1qtewJJgzY4Dy:5RAepBAmnuhN74k6GIhfWa8izY4

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 4 IoCs
  • Suspicious use of WriteProcessMemory 56 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c4a5e384abb8dceaf659da7a4092dd902500ce48c3ed2a5bd4d948f4e5ee4810.exe
    "C:\Users\Admin\AppData\Local\Temp\c4a5e384abb8dceaf659da7a4092dd902500ce48c3ed2a5bd4d948f4e5ee4810.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3012
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp_ext.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1472
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /K C:\Users\Admin\AppData\Roaming\lua\1.bat
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2528
        • 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:2556
          • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
            "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2556 CREDAT:17410 /prefetch:2
            5⤵
            • Modifies Internet Explorer settings
            • Suspicious use of SetWindowsHookEx
            PID:3992
        • C:\Windows\SysWOW64\rundll32.exe
          rundll32 syssetup,SetupInfObjectInstallAction DefaultInstall 128 C:\Users\Admin\AppData\Roaming\lua\1.inf
          4⤵
            PID:2860
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /K C:\Users\Admin\AppData\Roaming\lua\2.bat
            4⤵
            • Enumerates connected drives
            • Drops file in Program Files directory
            • Suspicious use of WriteProcessMemory
            PID:1180
            • 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:2112
            • 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:4308
            • C:\Windows\SysWOW64\reg.exe
              reg add "HKCU\Software\tmp" /v "key" /d ""http://www.82133.com/?S"" /f
              5⤵
                PID:2328
              • C:\Windows\SysWOW64\reg.exe
                reg add "HKCR\CLSID\{971C5380-92A0-5A69-B3EE-C3002B33309E}" /v "IsShortCut" /d "" /f
                5⤵
                • Modifies registry class
                PID:1044
              • 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\lua\3.bat""" /f
                5⤵
                • Modifies registry class
                PID:4192
              • C:\Windows\SysWOW64\attrib.exe
                attrib +s +h C:\Users\Admin\AppData\Roaming\lua\tmp\a.{971C5380-92A0-5A69-B3EE-C3002B33309E}
                5⤵
                • Sets file to hidden
                • Views/modifies file attributes
                PID:4072
              • C:\Windows\SysWOW64\attrib.exe
                attrib +s +h C:\Users\Admin\AppData\Roaming\lua\tmp
                5⤵
                • Sets file to hidden
                • Views/modifies file attributes
                PID:2868
              • C:\Windows\SysWOW64\rundll32.exe
                rundll32 syssetup,SetupInfObjectInstallAction DefaultInstall 128 C:\Users\Admin\AppData\Roaming\lua\2.inf
                5⤵
                • Adds Run key to start application
                • Suspicious use of WriteProcessMemory
                PID:2476
                • C:\Windows\SysWOW64\runonce.exe
                  "C:\Windows\system32\runonce.exe" -r
                  6⤵
                  • Checks processor information in registry
                  • Suspicious use of WriteProcessMemory
                  PID:2396
                  • C:\Windows\SysWOW64\grpconv.exe
                    "C:\Windows\System32\grpconv.exe" -o
                    7⤵
                      PID:4016
                • C:\Windows\SysWOW64\rundll32.exe
                  rundll32 D:\VolumeDH\inj.dat,MainLoad
                  5⤵
                    PID:3140
            • C:\Users\Admin\AppData\Local\Temp\inl4B4E.tmp
              C:\Users\Admin\AppData\Local\Temp\inl4B4E.tmp
              2⤵
              • Executes dropped EXE
              PID:740
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\C4A5E3~1.EXE > nul
              2⤵
                PID:3580

            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

              957d711ef13aae49d723c4d2b1d4fa37

              SHA1

              aa818a5cfb5ce97987c05c8f20866cbbafb4bf93

              SHA256

              43184ac9a857febd19b97a04797528a7de0c15744ae3d540e23cc4b5f1d2641b

              SHA512

              f5c8fb180bba40d0755c909349bb960be5b8242de651237b9c2368d74accbf845f3cad131ff9b80f71745353dd11b53ddda7fd5cb928a2f543be217b9e975030

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

              Filesize

              434B

              MD5

              195ef00234007fd294c5d5838545bd3b

              SHA1

              0a00f412ac56a728ea3638f5fba92e5c82baa27b

              SHA256

              eb57e7f62562cd097479114bec0f16bbd95d04e4459827600c960909f4f95ce1

              SHA512

              af6d5dbaabf02e6eb41d01dcfb1daafe29c2b2ccb4340c30bb6617d773524ffd76838ce32b24eaac5e5916c034fc02077c7d52916ee8f5ab250f97e645100a69

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

              Filesize

              906B

              MD5

              f2572338cb20db1d928b2c61282e6e87

              SHA1

              8b2b79ef1c914b0b00ec10a06caa8638b2163d45

              SHA256

              e9bc7df9f665d307b049d0d8bf74ed3c2ac1564094d3c4eff2568742bb5ebbbd

              SHA512

              240c9e2b2de396ef9dbe6b823723c61ba12c50e9a3b11f5f8f826aa55984d6c18a83361bf5b8f5d2602dbf8152e9feb35ceadce11d098aed246c52dc02771763

            • C:\Users\Admin\AppData\Local\Temp\inl4B4E.tmp

              Filesize

              57.2MB

              MD5

              5885684f548ffdd2506bc3be14066134

              SHA1

              b3125e276f50428930ed09b93f629a4c423c20bb

              SHA256

              e009bdc8e0abad23b99c38c5a918f723a0a2cb2b6e813b931839f3bd20df1bc7

              SHA512

              f30ad07d9d260ec4038e859fa1141671e4df8e6e4fd3340b07bf348008a50eaaf2e952534137ba1f6d854c948f0625caa3070c466f542ffa6248d67460bed396

            • C:\Users\Admin\AppData\Local\Temp\inl4B4E.tmp

              Filesize

              57.2MB

              MD5

              5885684f548ffdd2506bc3be14066134

              SHA1

              b3125e276f50428930ed09b93f629a4c423c20bb

              SHA256

              e009bdc8e0abad23b99c38c5a918f723a0a2cb2b6e813b931839f3bd20df1bc7

              SHA512

              f30ad07d9d260ec4038e859fa1141671e4df8e6e4fd3340b07bf348008a50eaaf2e952534137ba1f6d854c948f0625caa3070c466f542ffa6248d67460bed396

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

              Filesize

              50B

              MD5

              e08ad52d3d132292f9c51e7cfec5fe08

              SHA1

              269f7eb185a9ff02664297bfb6f5df9f86ec10f0

              SHA256

              bd2a3003fb1f771283b30a044c49aecb72bfdff4322330337dba4992ecd198f4

              SHA512

              3dc0331f3ee9a57de7bda71a94953239bc7033a130f2b783b35d17ce3ed7b7928c154323d10ba81bd81d3bfd2d7c123cec55f5178d2b44286c2f857ccd6a1722

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

              Filesize

              2KB

              MD5

              68a30985a8b4a1dae5b24721ca5b8269

              SHA1

              78481107bbddcf18ffc4d25a184ec74274241a6b

              SHA256

              fe94352a25ade782ea77db82f1ec849479ebfe4605156142fc3fdfabc507a0cf

              SHA512

              d452182a296a9e202bce81ad0c752b34d4d779cac94bb54a07517936b79a4007127585673c524c75055f15e33c56eef0d26d1c448723a97fe70c15457bae5a24

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

              Filesize

              410B

              MD5

              66a1f0147fed7ddd19e9bb7ff93705c5

              SHA1

              9d803c81ea2195617379b880b227892ba30b0bf6

              SHA256

              4f45ce85e221352f7fe26e04968c7f7267dc24b55cf2b72b929b4c90e48cb764

              SHA512

              cfe51756ddec75d240249980a4d27870d15983add25058e4d0da4d8a3ea11384d4d228d6cbc95091f91e516e1ab4dfb1e315941dbd95bf717d4b31936311d597

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

              Filesize

              3KB

              MD5

              c106ffc420b54a4f0fd331f10657dc66

              SHA1

              8930d5b56358f518bdf5ccca2b4d24f98ce7a03f

              SHA256

              fb8218f8c607ec3a4c4cb6e59ee81a94cf8ff513d0b09565ad456c88a9e7250b

              SHA512

              ee82fb57af0dddf8f1acab855cda151d3eacb8e11b0adc3a81852c1e2d77a566aa630ff5dabd8c7bc92ebe78b6187cc823c8a4a645ca78ee88e2c27483080fbd

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

              Filesize

              244B

              MD5

              524023ba7f18bfc502d22dbaade4571e

              SHA1

              fc118e1284db4e36da41d5cc4496ffa9a8b7cd2e

              SHA256

              5d170c83ca9a16ed7f62145099b3b8b0c0a1d4187e60bb0719754cb6ed40fc4c

              SHA512

              22384a0854a9949209444d9e7af3016327ad698e56797af246e02604b880949f40c7f4627303c11d73581c681b93bcee285b3937d4088c61107b9ec73901bdbc

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

              Filesize

              44KB

              MD5

              8639815b7bda81055eaba69766f4c83c

              SHA1

              fcd1aacf535d0e948a8ff8104126040d1efb5bb3

              SHA256

              cf1b5e5145057f947af3ab59060e7b184975c66a68d4076732774a572f8376c8

              SHA512

              02268150ae0042dc1b8fda8d2d31b8d94058ade4fff8244a60ba8580f464e1bb5cec4a77448ba730389f9680b27742a697174c5efe2c1ddccb342ab01a5b0954

            • memory/2556-173-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-146-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-153-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-156-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-158-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-160-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-162-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-163-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-165-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-166-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-152-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-150-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-149-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-148-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-171-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-223-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-176-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-177-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-178-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-222-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-147-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-217-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-182-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-183-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-184-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-185-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-154-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-187-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-191-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-192-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-144-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-216-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-195-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-214-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-213-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-198-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-142-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-212-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-141-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-203-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-211-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-208-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/2556-210-0x00007FF986080000-0x00007FF9860EE000-memory.dmp

              Filesize

              440KB

            • memory/3012-181-0x0000000000940000-0x000000000095F000-memory.dmp

              Filesize

              124KB

            • memory/3012-132-0x0000000000940000-0x000000000095F000-memory.dmp

              Filesize

              124KB

            • memory/3012-133-0x0000000000510000-0x0000000000513000-memory.dmp

              Filesize

              12KB