Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/11/2022, 18:50

General

  • Target
    cffe77cf0faff802b48c8dfcda7ae6bdef09e1a514a0d64a43113ec02b47dde6.exe
  • Size 140KB
  • Sample221107-xg2dnscfg8
  • SHA256 cffe77cf0faff802b48c8dfcda7ae6bdef09e1a514a0d64a43113ec02b47dde6
  • MD5 SHA1 SHA512 SSDEEP

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\cffe77cf0faff802b48c8dfcda7ae6bdef09e1a514a0d64a43113ec02b47dde6.exe
    "C:\Users\Admin\AppData\Local\Temp\cffe77cf0faff802b48c8dfcda7ae6bdef09e1a514a0d64a43113ec02b47dde6.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3464
    • 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:1984
      • 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:2112
        • 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:2308
          • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
            "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2308 CREDAT:17410 /prefetch:2
            5⤵
            • Modifies Internet Explorer settings
            • Suspicious use of SetWindowsHookEx
            PID:4080
        • C:\Windows\SysWOW64\rundll32.exe
          rundll32 syssetup,SetupInfObjectInstallAction DefaultInstall 128 C:\Users\Admin\AppData\Roaming\winzip\1.inf
          4⤵
            PID:5060
          • 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:1588
            • 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:1012
            • 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:3348
            • C:\Windows\SysWOW64\reg.exe
              reg add "HKCU\Software\tmp" /v "key" /d ""http://www.82133.com/?S"" /f
              5⤵
                PID:3716
              • C:\Windows\SysWOW64\reg.exe
                reg add "HKCR\CLSID\{971C5380-92A0-5A69-B3EE-C3002B33309E}" /v "IsShortCut" /d "" /f
                5⤵
                • Modifies registry class
                PID:952
              • 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:4208
              • 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:4372
              • 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:3760
              • 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:1504
                • C:\Windows\SysWOW64\runonce.exe
                  "C:\Windows\system32\runonce.exe" -r
                  6⤵
                  • Checks processor information in registry
                  • Suspicious use of WriteProcessMemory
                  PID:4396
                  • C:\Windows\SysWOW64\grpconv.exe
                    "C:\Windows\System32\grpconv.exe" -o
                    7⤵
                      PID:4076
                • C:\Windows\SysWOW64\rundll32.exe
                  rundll32 D:\VolumeDH\inj.dat,MainLoad
                  5⤵
                    PID:3904
            • C:\Users\Admin\AppData\Local\Temp\inl6D3.tmp
              C:\Users\Admin\AppData\Local\Temp\inl6D3.tmp
              2⤵
              • Executes dropped EXE
              PID:4904
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\CFFE77~1.EXE > nul
              2⤵
                PID:4508

            Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

                  Loading Replay Monitor...

                  Downloads

                  7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776

                  • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
                  • Size 471B
                  • SHA256 227fafbbbd678543e247cfdbf8b5ff60e8fc576da70c2a3f0f735cab2652dd2d
                  • MD5 SHA1 SHA512

                  7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776

                  • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\7423F88C7F265F0DEFC08EA88C3BDE45_AA1E8580D4EBC816148CE81268683776
                  • Size 434B
                  • SHA256 4ea9b0816d5c296378513ded5b291f4bc61c9948f0eb9ebb2fd1c7d26cbc810c
                  • MD5 SHA1 SHA512

                  cdf1912.tmp

                  • Path C:\Users\Admin\AppData\Local\Temp\cdf1912.tmp
                  • Size 1KB
                  • SHA256 a0583d0e827c3e2aabdfb4e99d6ce78e06eac265bd85f339559433571853f56d
                  • MD5 SHA1 SHA512

                  inl6D3.tmp

                  • Path C:\Users\Admin\AppData\Local\Temp\inl6D3.tmp
                  • Size 57.2MB
                  • SHA256 a6182cb9b31e4bf08cdd2e6f9c44e18a9ab05505033d89e3478372be213ab26c
                  • MD5 SHA1 SHA512 SSDEEP

                  inl6D3.tmp

                  • Path C:\Users\Admin\AppData\Local\Temp\inl6D3.tmp
                  • Size 57.2MB
                  • SHA256 a6182cb9b31e4bf08cdd2e6f9c44e18a9ab05505033d89e3478372be213ab26c
                  • MD5 SHA1 SHA512 SSDEEP

                  start_min_bat.bat

                  • Path C:\Users\Admin\AppData\Local\Temp\start_min_bat.bat
                  • Size 53B
                  • SHA256 a4bd6b14aa9694ba74db5503576072036cd232d586b5e3dd3fe3dade84a67b5e
                  • MD5 SHA1 SHA512

                  1.bat

                  • Path C:\Users\Admin\AppData\Roaming\winzip\1.bat
                  • Size 2KB
                  • SHA256 fe94352a25ade782ea77db82f1ec849479ebfe4605156142fc3fdfabc507a0cf
                  • MD5 SHA1 SHA512

                  1.inf

                  • Path C:\Users\Admin\AppData\Roaming\winzip\1.inf
                  • Size 410B
                  • SHA256 4f45ce85e221352f7fe26e04968c7f7267dc24b55cf2b72b929b4c90e48cb764
                  • MD5 SHA1 SHA512

                  2.bat

                  • Path C:\Users\Admin\AppData\Roaming\winzip\2.bat
                  • Size 3KB
                  • SHA256 fb8218f8c607ec3a4c4cb6e59ee81a94cf8ff513d0b09565ad456c88a9e7250b
                  • MD5 SHA1 SHA512

                  2.inf

                  • Path C:\Users\Admin\AppData\Roaming\winzip\2.inf
                  • Size 247B
                  • SHA256 3fd8eeaededa0a76d36df51803c01fe328ba110702a625b28c25bc83f6ef5940
                  • MD5 SHA1 SHA512

                  4.bat

                  • Path C:\Users\Admin\AppData\Roaming\winzip\4.bat
                  • Size 44KB
                  • SHA256 826762620265ac6c9bb44ff6ae2ac4fbb886f2d74119bf21a1ddc107c0dbf8e3
                  • MD5 SHA1 SHA512 SSDEEP

                  memory/2308-176-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-145-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-152-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-154-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-150-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-156-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-157-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-159-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-162-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-164-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-149-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-148-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-168-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-167-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-147-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-169-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-146-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-221-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-175-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-172-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-220-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-178-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-177-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-180-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-179-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-215-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-182-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-183-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-151-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-142-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-186-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-214-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-191-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-212-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-192-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-211-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-196-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-141-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-210-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-209-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-208-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-200-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-201-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/2308-207-0x00007FF862F80000-0x00007FF862FEE000-memory.dmp

                  memory/3464-133-0x0000000000400000-0x0000000000423000-memory.dmp

                  memory/3464-227-0x0000000000400000-0x0000000000423000-memory.dmp

                  memory/3464-132-0x0000000000400000-0x0000000000423000-memory.dmp