Analysis

  • max time kernel
    148s
  • 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
    14-10-2022 04:03

General

  • Target

    5b2c7b19efc6b4e06c4318cccd61e6731e9cf61d3d3c378b713d9667204496b0.exe

  • Size

    140KB

  • MD5

    68a48c9ffd48bb7df0309185a7795ffc

  • SHA1

    6d4d45bd8e2d35873b7999ea3d7e6c12168a4954

  • SHA256

    5b2c7b19efc6b4e06c4318cccd61e6731e9cf61d3d3c378b713d9667204496b0

  • SHA512

    575afdbf4a23f3a0596292c4dc9bf93cc626b9598f55c5a1819e83011ca87c7b2604ece07c495659c1a83f262939fa755e881e8bfece6a16d77bb9ef1dc7fbe2

  • SSDEEP

    1536:UnM12OVLjlevyaRLBnLuRgiaZxRIxecePKH56Hdb+S:bPLpeTLlamiaZxRIxecePKyD

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 57 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\5b2c7b19efc6b4e06c4318cccd61e6731e9cf61d3d3c378b713d9667204496b0.exe
    "C:\Users\Admin\AppData\Local\Temp\5b2c7b19efc6b4e06c4318cccd61e6731e9cf61d3d3c378b713d9667204496b0.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1052
    • 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:4292
      • 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:720
        • C:\PROGRA~1\INTERN~1\iexplore.exe
          C:\PROGRA~1\INTERN~1\IEXPLORE.EXE http://www.cnkankan.com/?71628
          4⤵
          • Modifies Internet Explorer settings
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:4812
          • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
            "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:4812 CREDAT:17410 /prefetch:2
            5⤵
            • Modifies Internet Explorer settings
            • Suspicious use of SetWindowsHookEx
            PID:3552
        • C:\Windows\SysWOW64\rundll32.exe
          rundll32 syssetup,SetupInfObjectInstallAction DefaultInstall 128 C:\Users\Admin\AppData\Roaming\winzip\1.inf
          4⤵
            PID:4588
          • 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:2412
            • C:\Windows\SysWOW64\reg.exe
              reg add "HKLM\Software\Microsoft\Internet Explorer\Main" /v "Start Page" /d ""http://www.71628.com/?S"" /f
              5⤵
              • Modifies Internet Explorer settings
              • Modifies Internet Explorer start page
              PID:2700
            • C:\Windows\SysWOW64\reg.exe
              reg add "HKCU\Software\Microsoft\Internet Explorer\Main" /v "Start Page" /d ""http://www.71628.com/?S"" /f
              5⤵
              • Modifies Internet Explorer settings
              • Modifies Internet Explorer start page
              PID:5100
            • C:\Windows\SysWOW64\reg.exe
              reg add "HKCU\Software\tmp" /v "key" /d ""http://www.71628.com/?S"" /f
              5⤵
                PID:4844
              • C:\Windows\SysWOW64\reg.exe
                reg add "HKCR\CLSID\{971C5380-92A0-5A69-B3EE-C3002B33309E}" /v "IsShortCut" /d "" /f
                5⤵
                • Modifies registry class
                PID:1084
              • 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:1300
              • 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:772
              • 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:2452
              • 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:1248
                • C:\Windows\SysWOW64\runonce.exe
                  "C:\Windows\system32\runonce.exe" -r
                  6⤵
                  • Checks processor information in registry
                  • Suspicious use of WriteProcessMemory
                  PID:1836
                  • C:\Windows\SysWOW64\grpconv.exe
                    "C:\Windows\System32\grpconv.exe" -o
                    7⤵
                      PID:5072
                • C:\Windows\SysWOW64\rundll32.exe
                  rundll32 D:\VolumeDH\inj.dat,MainLoad
                  5⤵
                    PID:1424
            • C:\Users\Admin\AppData\Local\Temp\inlC22.tmp
              C:\Users\Admin\AppData\Local\Temp\inlC22.tmp
              2⤵
              • Executes dropped EXE
              PID:1144
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\5B2C7B~1.EXE > nul
              2⤵
                PID:4180

            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

              60c5dda6c87529c1fdbe874fd534913b

              SHA1

              141dd530c67ebdac9998a8f253aede034519ebbb

              SHA256

              c210d69c28a4a6abb399a425ffb66797df7c3fcf3bfc9eab0bf0dc7e19fc84ee

              SHA512

              bfd86d9e0ee15f5b183070573cfd693e83ce1083aa9c061ce9e68ed0f38518352ccd11b5f78a4b9179bccbed6dad89ee2003b414fbc1e20cf835af7c57b232c5

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

              Filesize

              434B

              MD5

              bb140769427acfa60fc27fe8eec8005b

              SHA1

              57dba6c20cc37e4fd7e53dabc39ca5ec2233a904

              SHA256

              870e5843310b62ff36de806bbc64441e322febdce6ee8b710cbc6c9ced6e484b

              SHA512

              d8f8f3111d3bc88187138e0fc9795f99f5123f07e47c3e19d25599e096f76552d04bb6d9e72c226bbe4312c8fa1cefffcad855198c5866c3b8efbfa9779fc03c

            • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\imagestore\ckj4gk4\imagestore.dat

              Filesize

              1KB

              MD5

              1bc0625c4dcf5ec6efa08cf18b5c6213

              SHA1

              9437c58fee7b9232a33cf730b5e75fbcdfd67acf

              SHA256

              a1e90c71b0b380d5af6b8111284e27a8bebbbfb1cf9547f25877842d14fcc98c

              SHA512

              cdd3d05a3903fce3ec0527faf6db007400e095c9ce10e3ba4211fae3c249231e8131d9a137209cd52caa48698f52cf1dcb8f7a7984d8ddc99b8a264a0e67620d

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

              Filesize

              1KB

              MD5

              ab301ff15c000838c221b76a00aecb93

              SHA1

              a9bd18bb6340c7055fdb627d85bf6f90a48eca21

              SHA256

              5df478abe9d623d2707ca39a73259cbe95da2c824d23ed44454f55c5d67e6884

              SHA512

              0cb9e594bbd0d27f03a0553255a0b238243147154c2bfc07a2a915369153185003087e47cd582f84f0dad954ea508896cce1387f596604f93e47287fe46e42e7

            • C:\Users\Admin\AppData\Local\Temp\inlC22.tmp

              Filesize

              57.2MB

              MD5

              680ee1d9a4aa766516b1a6a7e4217490

              SHA1

              5ade39f996d2ae2923b25ddc5d3ca37551ea9c22

              SHA256

              7cc8a7a7b017f33c56c7f2fb15d9d321b5f0770b9e0eaefbbc00bc79c45b2d95

              SHA512

              49c9a23f1de3c176d1f3bfe389587d16bd7a7491d3f351115cd31952ccb22f55c4968bb89e0a2a57f702bad961c8a3c99b3467c5ff9733a2b73db7abf185f86b

            • C:\Users\Admin\AppData\Local\Temp\inlC22.tmp

              Filesize

              57.2MB

              MD5

              680ee1d9a4aa766516b1a6a7e4217490

              SHA1

              5ade39f996d2ae2923b25ddc5d3ca37551ea9c22

              SHA256

              7cc8a7a7b017f33c56c7f2fb15d9d321b5f0770b9e0eaefbbc00bc79c45b2d95

              SHA512

              49c9a23f1de3c176d1f3bfe389587d16bd7a7491d3f351115cd31952ccb22f55c4968bb89e0a2a57f702bad961c8a3c99b3467c5ff9733a2b73db7abf185f86b

            • 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

              582695c0131019067973d3870c8c9bca

              SHA1

              575da5536074707385418985375d6735fec7de77

              SHA256

              4dd7bb56ca6f2e48cd57ceafcd79ff31c11ce2d474d777ee5c9e16c5bfbf3e9c

              SHA512

              ea59965f427ca826734115290e42ed9a2b7db66853474a735c0add16b5e0f2e799fe7586aa2114443797d3ea02c09e36523d072dc12be38c9be5ddbab6083231

            • 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

              2cc7ab0e0e60b07b036165b5359b4f29

              SHA1

              ce5d46d531e37bb52ac4983c061963223b043052

              SHA256

              52ed22e575304c981f0f44c771fdd7d4fe185ecfba4ff9e3ac24986686e58be9

              SHA512

              35bb22bf0c253a0d099f6fbf92ebea36714a674459f7185bce8267aee79ddceeef010a86b3e0f5a1aa9af0d7d3843c4a905a171529e19472543c916b7c926746

            • 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

              48bec5741669dd0cd3a911a24210a98f

              SHA1

              b81344407043587dd9848e915a15249886899eb4

              SHA256

              cad5fb55367abbb94e87c0081c24b33c0d99f4e270918069cc3fac17ad549ee7

              SHA512

              a1b72c5f8ccbe8d981561051974f4a896ca084d74980136cd45d741751609b42bf8431b2de56eb6400abc85d6679d349a291a578055d7c01e76311975bed161f

            • memory/1052-132-0x0000000000400000-0x0000000000423000-memory.dmp

              Filesize

              140KB

            • memory/1052-229-0x0000000000400000-0x0000000000423000-memory.dmp

              Filesize

              140KB

            • memory/4812-177-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-151-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-162-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-160-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-170-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-163-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-172-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-174-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-140-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-176-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-159-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-178-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-157-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-158-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-181-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-182-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-184-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-155-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-185-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-153-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-187-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-191-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-167-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-193-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-150-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-147-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-148-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-149-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-196-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-199-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-200-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-141-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-206-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-208-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-207-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-209-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-210-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-211-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-213-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-214-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-219-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-220-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-145-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB

            • memory/4812-144-0x00007FFC5C300000-0x00007FFC5C36E000-memory.dmp

              Filesize

              440KB