Resubmissions

01/07/2025, 07:25

250701-h9bw6asry710

06/11/2024, 02:31

241106-cztrbstepk10

Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/11/2024, 02:31

General

  • Target
    ransom.exe
  • Size 7.8MB
  • Sample241106-cztrbstepk
  • SHA256 102276ae1f518745695fe8f291bf6e69856b91723244881561bb1a2338d54b12
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Path
  • C:\Users\Admin\AppData\Local\Adobe\Acrobat\DC\Cache\CyberVolk_ReadMe.txt

Ransom Note
  • Greetings. All your files have been encrypted by CyberVolk ransomware. Please never try to recover your files without decryption key which I give you after pay. They could be disappeared� You should follow my words. Pay $1000 BTC to below address. My telegram : @hacker7 Our Team : https://t.me/cubervolk We always welcome you and your payment.
URLs
  • https://t.me/cubervolk

Signatures

  • Renames multiple (2241) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Credentials from Password Stores: Windows Credential Manager 1 TTPs

    Suspicious access to Credentials History.

  • Drops startup file 4 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops desktop.ini file(s) 64 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

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

  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

Processes

  • C:\Users\Admin\AppData\Local\Temp\ransom.exe
    "C:\Users\Admin\AppData\Local\Temp\ransom.exe"
    1⤵
    • Drops startup file
    • Drops desktop.ini file(s)
    • Enumerates connected drives
    • Sets desktop wallpaper using registry
    • System Location Discovery: System Language Discovery
    PID:1944

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        edbres00002.jrs.cvenc

        • Path C:\ProgramData\Microsoft\Search\Data\Applications\Windows\edbres00002.jrs.cvenc
        • Size 1.0MB
        • SHA256 227ebd8fc550b86db2971885239face474bf0f35f400d56c9f9a62ec25c3adb3
        • MD5 SHA1 SHA512 SSDEEP

        vc_runtimeMinimum_x86.msi.cvenc

        • Path C:\ProgramData\Package Cache\{BD95A8CD-1D9F-35AD-981A-3E7925026EBB}v11.0.61030\packages\vcRuntimeMinimum_x86\vc_runtimeMinimum_x86.msi.cvenc
        • Size 149KB
        • SHA256 6c8b6942b02f79f232acf463534efa2f3e9a12ea793c3e69ae5cd4def17f616e
        • MD5 SHA1 SHA512 SSDEEP

        CyberVolk_ReadMe.txt

        • Path C:\Users\Admin\AppData\Local\Adobe\Acrobat\DC\Cache\CyberVolk_ReadMe.txt
        • Size 348B
        • SHA256 894bc59f5227b4d545412b2a2897367d7ac88090c86f5a1728bf733e70bd93ee
        • MD5 SHA1 SHA512

        Microsoft_AutoGenerated_{A5E73466-E220-8EF4-B956-A582187356D9}.cvenc

        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\AppIconCache\100\Microsoft_AutoGenerated_{A5E73466-E220-8EF4-B956-A582187356D9}.cvenc
        • Size 37KB
        • SHA256 05a9ce8fa536788dfd9ffa3fd2d18e35d9ee14da3703130dd80052922dc89a0a
        • MD5 SHA1 SHA512 SSDEEP

        Microsoft_Windows_Shell_RunDialog.cvenc

        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\AppIconCache\100\Microsoft_Windows_Shell_RunDialog.cvenc
        • Size 37KB
        • SHA256 0ecce08009edf2fba52e85d571c21fe3a6c5dbbe7ca8c152a75d640df1931696
        • MD5 SHA1 SHA512 SSDEEP

        {1AC14E77-02E7-4E5D-B744-2EB1AE5198B7}_comexp_msc.cvenc

        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\AppIconCache\100\{1AC14E77-02E7-4E5D-B744-2EB1AE5198B7}_comexp_msc.cvenc
        • Size 37KB
        • SHA256 c0f37fd2bb23c2a25e8842e92f7be05a2a9d816cfbc38a7ede83bc5d41036c93
        • MD5 SHA1 SHA512 SSDEEP

        {D65231B0-B2F1-4857-A4CE-A8E7C6EA7D27}_WindowsPowerShell_v1_0_PowerShell_ISE_exe.cvenc

        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\AppIconCache\100\{D65231B0-B2F1-4857-A4CE-A8E7C6EA7D27}_WindowsPowerShell_v1_0_PowerShell_ISE_exe.cvenc
        • Size 37KB
        • SHA256 acbbafdb829d9c85514c71b5c3e19d37c9b422849b59f934cf34bac0b08c052b
        • MD5 SHA1 SHA512 SSDEEP

        AppCache133727662143668243.txt.cvenc

        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache133727662143668243.txt.cvenc
        • Size 78KB
        • SHA256 b56361c13a2249f4d298bbc6cd83ce226ba8bea49d7acc881c950852fd8c5ecf
        • MD5 SHA1 SHA512 SSDEEP

        AppCache133727668321811013.txt.cvenc

        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache133727668321811013.txt.cvenc
        • Size 65KB
        • SHA256 2715570ae2dd63d042b1704271d4d40f01745b113b073e2fee6b1aa3e53186f8
        • MD5 SHA1 SHA512 SSDEEP

        3561288849sdhlie.sqlite.cvenc

        • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\lhmx4teg.default-release\storage\permanent\chrome\idb\3561288849sdhlie.sqlite.cvenc
        • Size 49KB
        • SHA256 d96246ceedb3cae357db23f08fb04904d9048d12cb77bc176012e2b46b521fda
        • MD5 SHA1 SHA512 SSDEEP

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 d24b87329bb09b449a89676a4e96858c289cdfad521c03fb9ce166a83aceb603
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 ca1b7797566e850c3e583a2fbda610a51d5504ca9b0d611a0a3e2770c912d52d
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 75de81c20d6f96afffc7becf1d76612842635a9c70167b482e233540738a97e5
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 720652a25d4ab67f2e7d9fa3b13023e92f3f21024e2157034de2773d5583053d
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 d0653fe8530d7c8e76243fe8c3fadaab5d9f82833de425d7470fe3076b6a9e3a
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 5022dc0e73652dd87801c6c0f786e96d32481d04d3223b8650041d514bc357ae
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 9323ada035535298a0de65f40698a45122446c861947978f1be17123ecf09a53
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 bfed65e0ee3b331187d31bd503dcbad42f17bf749b37c34f64cf8bbc3007073c
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 fd3422d11e9fdacf030f74df8a97aef973337371c49d6746fa29e06a4e54888b
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 dfafe84b27c1097ac79831f5ee8fcb79c84bd2079709c327141de09549db4d73
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 2f9eb41971f04446e33576e5f0c054843cd321d480fcc02dbd19a3c0a8bdb93d
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 4d34572db62871b8fed75a40eaf827867044b536a795be11eac1a1ac78c909b7
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 3a160ea06e31f2ee63e5efd6ef85b10d78b300d777006235ffe8756decd13c94
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 78ef135cef6cb29d44b91beb545a2a78dbdbc0a981735bad98640318a1b80b9b
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 d274893c31d10ef0bc342e59f149963ffff586f70cbf6c8b59325bf97415f62e
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 2a50ac545f30b02200c4f18f694ce7e0ce691e9f509c38d8beebf3b4dd046b53
        • MD5 SHA1 SHA512