Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/11/2024, 16:00

General

  • Target
    ransom.exe
  • Size 7.8MB
  • Sample241105-tfmx4stfmc
  • 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 (2327) 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:4472

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        vc_runtimeAdditional_x86.msi.cvenc

        • Path C:\ProgramData\Package Cache\{7DAD0258-515C-3DD4-8964-BD714199E0F7}v12.0.40660\packages\vcRuntimeAdditional_x86\vc_runtimeAdditional_x86.msi.cvenc
        • Size 141KB
        • SHA256 98bf08f4d138b4072fdadfeadc620369ac553124f26d8686a52ddd71d3b63b7c
        • MD5 SHA1 SHA512 SSDEEP

        vc_runtimeMinimum_x64.msi.cvenc

        • Path C:\ProgramData\Package Cache\{CF2BEA3C-26EA-32F8-AA9B-331F7E34BA97}v11.0.61030\packages\vcRuntimeMinimum_amd64\vc_runtimeMinimum_x64.msi.cvenc
        • Size 149KB
        • SHA256 3d340b6be3e0d6357a8c33a922ce1f0bf7bba6dc4090030152e0607e507dcb55
        • 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

        CURRENT.cvenc

        • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Sync Data\LevelDB\CURRENT.cvenc
        • Size 1KB
        • SHA256 22f295ad9bbd34ffbe8db79fed3743f096e4243affdeb09176fff40f02be80b5
        • 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 a5f601353bf48b520186466a17f9829ce00c6c4c5cfc78d985cd75e3c47c6a49
        • 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 31dc77773e13868ed58752e571c2a921954ab8538fa02a9d2b8fb1e1350750be
        • MD5 SHA1 SHA512 SSDEEP

        AppCache133727662742439442.txt.cvenc

        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache133727662742439442.txt.cvenc
        • Size 78KB
        • SHA256 5a28338f4dbd6dfb8fdf92c6e652351d6a68fdf8f4a609b4e6d23ee88df0ccd9
        • MD5 SHA1 SHA512 SSDEEP

        AppCache133727664412580892.txt.cvenc

        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache133727664412580892.txt.cvenc
        • Size 48KB
        • SHA256 70e329ba9a0f385b60c65f03d01a33a0efe3649696638ca982edbff20617774d
        • MD5 SHA1 SHA512 SSDEEP

        AppCache133727670038515250.txt.cvenc

        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\LocalState\DeviceSearchCache\AppCache133727670038515250.txt.cvenc
        • Size 66KB
        • SHA256 5c1d09b49db54ffedd968bd2455df9bac902bba14be1abfa897a3979710ca483
        • MD5 SHA1 SHA512 SSDEEP

        3561288849sdhlie.sqlite.cvenc

        • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\7fmsgkth.default-release\storage\permanent\chrome\idb\3561288849sdhlie.sqlite.cvenc
        • Size 49KB
        • SHA256 1b4e463d3403f985392a2e761e1f3880342af39c5152bca33d9dc2c31e2aef40
        • MD5 SHA1 SHA512 SSDEEP

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 2fa8eba4e72866823c3e963389d1d3a58d1bf10b6bb427b384b914a3629af429
        • MD5 SHA1 SHA512

        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 987f32746376de3fa8ff935ec01448a5936c8e222ce383cf89b4dc2ecdc67ea8
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 7e93bf8ba9708c55865983f7a83a39ac766ee84bccbb1df4d9f9a37e7b3bdb43
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 4b9647fd16286b9d48f8957d016408d48324837a2dc4726070225737e5764791
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 45c08529fc638c300feeb27a726d997626694ac3793087acc34e51f0a6e170e8
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 23d73ca299f02110f10fe0b18902fd2ea5ad124d3a061f110083353b3899c369
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 c220777a3969d97f8c08265becbb6fcd9bddfab7c48456e450fed01101f16a76
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 d46637522853433efdf1806e2e5336c312d5ba0ff0a32b80468e96b8abf11c04
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 5a8bbd7a0887dfcfee9cd1f97e7ba9e568741cb632f3121b5b7d4f3e90e85b79
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 d6e1d9c927753981079ade4b46eb23e9179b89e3b13f06f025b3a798d63b6c0f
        • 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 bd41cbdc04707f80b319802470a1871b99d36766f9d020cc0f9a569a4d1bb54b
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 a5f6e28cca214fb60a873fd4b27ea02bbef08b5bde05f4ba831b790a54a2435c
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 e20c996edc342b0e8fe4abe8a1b4373ae040e36b367cf6188e43d04950b7f6c6
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 4b9d476385096c42149ad8a1b35edf317f99c9d61ffc348d8950ab0c31cf543f
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 9c1ee8df1c0a91f0259f13024069c7fd8d7601df3b4b305f358bd8ce161aedb2
        • MD5 SHA1 SHA512

        time.dat

        • Path C:\Users\Admin\AppData\Roaming\time.dat
        • Size 5B
        • SHA256 438f91a3a02080977006d5b4ee2c29f6e0d0b58e848dc92712f3982a1449f481
        • MD5 SHA1 SHA512