Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    04/07/2024, 18:47

General

  • Target
    holfix.exe
  • Size 256KB
  • Sample240704-xffqksvgrd
  • SHA256 6b3ed396381a68ca58a1f4c73f00b40e2c2f555d031690865a64f26d2c5ed7fb
  • MD5 SHA1 SHA512 SSDEEP
Score
8/10
upx

Malware Config

Signatures

  • Drops file in Drivers directory 4 IoCs
  • Loads dropped DLL 48 IoCs
  • UPX packed file 2 IoCs

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

  • Drops file in System32 directory 24 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies Internet Explorer settings 1 TTPs 46 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\holfix.exe
    "C:\Users\Admin\AppData\Local\Temp\holfix.exe"
    1⤵
    • Drops file in Drivers directory
    • Loads dropped DLL
    • Drops file in System32 directory
    • Suspicious use of WriteProcessMemory
    PID:2064
    • C:\Program Files\Internet Explorer\iexplore.exe
      "C:\Program Files\Internet Explorer\iexplore.exe" http://half-open.com/
      2⤵
      • Modifies Internet Explorer settings
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2836
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2836 CREDAT:275457 /prefetch:2
        3⤵
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:1848

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        3C428B1A3E5F57D887EC4B864FAC5DCC

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\3C428B1A3E5F57D887EC4B864FAC5DCC
        • Size 914B
        • SHA256 cb3ccbb76031e5e0138f8dd39a23f9de47ffc35e43c1144cea27d46a5ab1cb5f
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
        • Size 70KB
        • SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
        • MD5 SHA1 SHA512 SSDEEP

        F0ACCF77CDCBFF39F6191887F6D2D357

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F0ACCF77CDCBFF39F6191887F6D2D357
        • Size 1KB
        • SHA256 df545bf919a2439c36983b54cdfc903dfa4f37d3996d8d84b4c31eec6f3c163e
        • MD5 SHA1 SHA512

        3C428B1A3E5F57D887EC4B864FAC5DCC

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\3C428B1A3E5F57D887EC4B864FAC5DCC
        • Size 252B
        • SHA256 3695c3f3ec8048bf382a97406f191100c4942c70054d48ff354fcd54850f46ed
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 342B
        • SHA256 d16ea83cbaa1b2cd548f67cc072d061270459e43223b6f98967a24fa0911f601
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 342B
        • SHA256 c39398d348c6eb23086e46c478badd256b65bbf282fbec05ba2a6c3eb2dc36f3
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 344B
        • SHA256 36bceebc89fb597acec1701f83ea09c1419a292f09976c4e59d30c7bf63a6484
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 342B
        • SHA256 be3df786b7e96819a1bff53d5e03702bc53ff916645e9c09c989d29b87087fd1
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 342B
        • SHA256 205fa3666a772cd99dc993dceb48cbc406d3b2d94fd5342c46e930d49f4e4475
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 342B
        • SHA256 befd6ecef761ac8a9b9c022c9b68702dd850d75bd0b22aa843e38a35aa17f88e
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 342B
        • SHA256 6df8fc953c006bd6fca9f597444cdb97cfe299093934e782c72869cd6be48506
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 342B
        • SHA256 aa2f8e05f3678e6fb0b8d671f0337d67de6ddda211c52fecfe44a799d6ba1f17
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 342B
        • SHA256 9c9477b643206b8cd9af9146a8bb719af6b8f4bc2b0d429e65313081c582df40
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 342B
        • SHA256 1782b99a59f706eff222f37a506ae9224815fbb67e27cbf2c4306a78fdf61e0f
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 342B
        • SHA256 bcbaa9bee41fb1329c7fcbcf4e84ca5b40992fcc4f58c2ee99d8c959c938a8eb
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 342B
        • SHA256 69a00e254fbc4ada86da6146a380bb3ccbd00ce708a1c8ef36ced0b3c4ce987e
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 342B
        • SHA256 9e56781c50086c495ef619365b22855960b99f1a11d21443ca33b382714df318
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 342B
        • SHA256 8970835446ea8e71c25ed3016e5dde143975d598f8850ee1aa3f0aabc8c229e1
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 342B
        • SHA256 beeede39d44e98f98b8fd102688aa8c543353500749dcd674ba0ddde4e8de02c
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 342B
        • SHA256 aba49ca78ea7cc1704b197fe66aef06ef4670f7034f560df5f232d5086b574ad
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 342B
        • SHA256 834f7419f31dd1c37a9ab765b08c872bebbc9f43c2d878765ad08a20579aebe4
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 342B
        • SHA256 cd760a9bed89a5deaf445fd2c310954d228f7f12a3a6ce0e948ee2126e8a7edd
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 342B
        • SHA256 f3041e5f41723c1a7ec2c3159cd69137e747de3899bf870263ffcecf9b88f84b
        • MD5 SHA1 SHA512

        94308059B57B3142E455B38A6EB92015

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
        • Size 342B
        • SHA256 7fb634dea8ea9aaf156ab991a437109c7851e2289d4bb73b0a35095cd3e45ad0
        • MD5 SHA1 SHA512

        F0ACCF77CDCBFF39F6191887F6D2D357

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357
        • Size 242B
        • SHA256 c792e908cca59d7871d2e11da75cb3b0811958e4f4cfff05a7019f10a92ec32f
        • MD5 SHA1 SHA512

        half-open[1].xml

        • Path C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\DOMStore\QW2DB4G6\half-open[1].xml
        • Size 262B
        • SHA256 1d65d5ca671c94af916aed864235f857ba82c13db6131a01b34ba313f0fd5073
        • MD5 SHA1 SHA512

        imagestore.dat

        • Path C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\imagestore\92mvs6j\imagestore.dat
        • Size 1012B
        • SHA256 11f5839811c1c71288276dde5011d7c1fbe4b357e3e8bfd5bed6797868691d80
        • MD5 SHA1 SHA512

        f[1].txt

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\J8SD872Q\f[1].txt
        • Size 40KB
        • SHA256 058c684507453f967332e5e65c9b5e3595ffd957bea34540542c272b89a2603d
        • MD5 SHA1 SHA512 SSDEEP

        favicon[1].ico

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\TTL9DZJ3\favicon[1].ico
        • Size 894B
        • SHA256 0733e9ae345ee15b468e2aa7363e87aad4e8a42f2e55e641acd02c0c42031a21
        • MD5 SHA1 SHA512

        Cab8900.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\Cab8900.tmp
        • Size 68KB
        • SHA256 1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
        • MD5 SHA1 SHA512 SSDEEP

        Tar8902.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\Tar8902.tmp
        • Size 177KB
        • SHA256 67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34
        • MD5 SHA1 SHA512 SSDEEP

        Tar89A4.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\Tar89A4.tmp
        • Size 181KB
        • SHA256 8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8
        • MD5 SHA1 SHA512 SSDEEP

        user32new.dll.mui

        • Path \Windows\System32\de-DE\user32new.dll.mui
        • Size 19KB
        • SHA256 bc5a077b0b3daafda0ef75bbf92b9dfa81b0ff01dbbd603f947282437fe0b4d0
        • MD5 SHA1 SHA512 SSDEEP

        user32new.dll.mui

        • Path \Windows\System32\en-US\user32new.dll.mui
        • Size 17KB
        • SHA256 4420eca521bf0c29aa2b14835a9c4d36770a2c42a3c8b097a7a755e8937b419b
        • MD5 SHA1 SHA512 SSDEEP

        user32new.dll.mui

        • Path \Windows\System32\es-ES\user32new.dll.mui
        • Size 19KB
        • SHA256 8b38226109ce42f831e3b2859f09ceb6dc871fc35e184f05e5e5425b290e41d6
        • MD5 SHA1 SHA512 SSDEEP

        user32new.dll.mui

        • Path \Windows\System32\fr-FR\user32new.dll.mui
        • Size 20KB
        • SHA256 67eee41ba82aad3adf2b4c34d108cc88b108c9eebc02f901863e2c8438e38b40
        • MD5 SHA1 SHA512 SSDEEP

        user32new.dll.mui

        • Path \Windows\System32\it-IT\user32new.dll.mui
        • Size 19KB
        • SHA256 d58f104cb5ef742c6cf34edc2d5d7d90f2e24c39b43891f2a2c07cded4bb9c34
        • MD5 SHA1 SHA512 SSDEEP

        user32new.dll.mui

        • Path \Windows\System32\ja-JP\user32new.dll.mui
        • Size 14KB
        • SHA256 7d91394a5c63cd5c6a599700ee0c079b9561f2824973695c886c77982a6adea9
        • MD5 SHA1 SHA512 SSDEEP

        memory/2064-123-0x0000000000400000-0x00000000004C8000-memory.dmp

        memory/2064-119-0x0000000002F40000-0x0000000003144000-memory.dmp

        memory/2064-102-0x0000000002F40000-0x0000000003144000-memory.dmp

        memory/2064-0-0x0000000000400000-0x00000000004C8000-memory.dmp

        memory/2064-1-0x0000000000230000-0x0000000000231000-memory.dmp