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Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/03/2024, 13:47

General

  • Target

    b2483ad0a449f083de08dfc3f6ea52d5.exe

  • Size

    88KB

  • MD5

    b2483ad0a449f083de08dfc3f6ea52d5

  • SHA1

    b2564a83daff947b6cd8bd991c3c97da2b486cc5

  • SHA256

    2fae63b5ac9132e0cbe6ed4804af043bf257ed480e432ff6c4278044a3dbe832

  • SHA512

    c20e9df0cb777326e0b4f1864562e324f9d888977331197479bc3b50b27643b55796f621168c5f84fdfa22f4de6a555f9e2500e7252945e797b4b9c0769daaf6

  • SSDEEP

    1536:n3eNvWRUCl7c2+ca+Kt7Jg129ApRBgaYtRHcVUHTn3UgXxuheC3+9nnlhBg:3qWRdpc2+Ya7K0SpRBgaYtRHcVUHD3U/

Score
10/10

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 3 IoCs
  • Modifies visibility of file extensions in Explorer 2 TTPs 3 IoCs
  • Blocks application from running via registry modification 3 IoCs

    Adds application to list of disallowed applications.

  • Executes dropped EXE 4 IoCs
  • UPX packed file 25 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Adds Run key to start application 2 TTPs 9 IoCs
  • Enumerates connected drives 3 TTPs 9 IoCs

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

  • Drops file in System32 directory 16 IoCs
  • Drops file in Windows directory 63 IoCs
  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of SetWindowsHookEx 7 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b2483ad0a449f083de08dfc3f6ea52d5.exe
    "C:\Users\Admin\AppData\Local\Temp\b2483ad0a449f083de08dfc3f6ea52d5.exe"
    1⤵
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4628
    • \??\c:\windows\explorer.exe
      c:\windows\explorer.exe C:\Users\Admin\AppData\Local\Temp\b2483ad0a449f083de08dfc3f6ea52d5
      2⤵
        PID:1036
      • \??\c:\windows\winsystem.exe
        c:\windows\winsystem.exe
        2⤵
        • Modifies WinLogon for persistence
        • Modifies visibility of file extensions in Explorer
        • Blocks application from running via registry modification
        • Executes dropped EXE
        • Adds Run key to start application
        • Enumerates connected drives
        • Drops file in System32 directory
        • Drops file in Windows directory
        • Modifies registry class
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1104
        • \??\c:\windows\sysa.exe
          c:\windows\sysa.exe
          3⤵
          • Executes dropped EXE
          • Drops file in System32 directory
          • Drops file in Windows directory
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:4824
          • \??\c:\windows\sysb.exe
            c:\windows\sysb.exe
            4⤵
            • Modifies WinLogon for persistence
            • Modifies visibility of file extensions in Explorer
            • Blocks application from running via registry modification
            • Executes dropped EXE
            • Adds Run key to start application
            • Drops file in System32 directory
            • Drops file in Windows directory
            • Modifies registry class
            • Suspicious use of SetWindowsHookEx
            PID:2736
        • \??\c:\windows\sysa.exe
          c:\windows\sysa.exe
          3⤵
          • Modifies WinLogon for persistence
          • Modifies visibility of file extensions in Explorer
          • Blocks application from running via registry modification
          • Executes dropped EXE
          • Adds Run key to start application
          • Drops file in System32 directory
          • Drops file in Windows directory
          • Modifies registry class
          • Suspicious use of SetWindowsHookEx
          PID:4192
    • C:\Windows\explorer.exe
      C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
      1⤵
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious use of SetWindowsHookEx
      PID:2808
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:4744

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Windows\windows.exe

        Filesize

        88KB

        MD5

        b2483ad0a449f083de08dfc3f6ea52d5

        SHA1

        b2564a83daff947b6cd8bd991c3c97da2b486cc5

        SHA256

        2fae63b5ac9132e0cbe6ed4804af043bf257ed480e432ff6c4278044a3dbe832

        SHA512

        c20e9df0cb777326e0b4f1864562e324f9d888977331197479bc3b50b27643b55796f621168c5f84fdfa22f4de6a555f9e2500e7252945e797b4b9c0769daaf6

      • \??\c:\encrypt.txt

        Filesize

        14B

        MD5

        a18431860b53b3d76768c72d03ed0f6b

        SHA1

        97d8589ccf254c187a517e0dd00f0f31086edbdb

        SHA256

        1ec66eaee1724701915130be8778f675d215000c66c722362670d5330aab2812

        SHA512

        82ccdac7469c19a7fade57aeef57bacb69448dc23ea1ca0d6e7340bf54e216425f5adf5a9008c1c8c60f3a968f82fa18e380974e6724c25ec2087efa92705de9

      • \??\c:\encrypt.txt

        Filesize

        577B

        MD5

        b3b020c4b060bfe84fbbb424221f1073

        SHA1

        eb9e62232504b9180f8a3f718b64cb68e4149b2c

        SHA256

        c13cda99ef7b0a48b7829d4a586483a0c09d0bc2400bf44dbb9efe2fb9c4f2fc

        SHA512

        57c216c612b2c8069a7f3dc8f61f8076d0f1c03dd933699f7fcd9a792e3c907e301575af6021f370809f6f2e0d2efa2ddcf4b6411d056890c728aabb5436a708

      • \??\c:\windows\SysWOW64\oeminfo.ini

        Filesize

        622B

        MD5

        d7f66fc25609ee73edc3fd6b255ff55e

        SHA1

        9a7dd2784e53f4a55d0d26d24ca20ec1c937cc7b

        SHA256

        d23bc4f30a9e5f0fedd7688435045bfe6c961c9fea4878b493d15e98aae0446c

        SHA512

        e67612ac8822765e51b071b3f264175527a34378e5eca05196f76d2685be3ad36dae8e5d178890cedbc1ac3364eb875b01ba632332a8c68057ca094d3385f876

      • \??\c:\windows\SysWOW64\oemlogo.bmp

        Filesize

        38KB

        MD5

        be6708e2d2b827b96986be51f0fe3c49

        SHA1

        b2ac649475b1561ce74416ca12187e688c2c82ba

        SHA256

        ace4b11d1720f686532407398bf8de75f32dda63cf237d50dd7fbc25612e0af0

        SHA512

        a3f7f06c95eee2cb828ea060e2b618746c8b423602e257a360961744b8b8d57e37e9ba575162be8c8fc3eed9b7792911211ac71eb5c63a57eee42e14a9e09312

      • \??\c:\windows\system\oeminfo.ini

        Filesize

        685B

        MD5

        1426be8632f29a0c2c879c8c533b0aa8

        SHA1

        08b8b741ed94a760afd6995695aa5fa3fe0bbd6d

        SHA256

        341c01d668bdcbe49dabce3bc5a18b85b773f0ad9dca12bceb73b0d29cd32707

        SHA512

        168be384a3826c6e74bb606da4f607b9d4b3f5cc28c383f7e1bf455ba8f915906c3295416c005e3de1757ef379a610cbcb35e6dbcc3cf5154cb973055ef19bdd

      • memory/1104-503-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/1104-392-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/1104-745-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/1104-724-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/1104-75-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/1104-362-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/1104-592-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/1104-695-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/1104-391-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/1104-774-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/1104-421-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/1104-468-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/1104-623-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/1104-542-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/1104-563-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/1104-674-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/2736-547-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/2736-375-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/4192-548-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/4192-376-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/4628-0-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/4628-118-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/4824-300-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/4824-209-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB