Overview

overview

10

Static

static

10

2024-02-25...to.exe

windows7-x64

10

2024-02-25...to.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    120s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    25/02/2024, 16:30

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General

  • Target

    2024-02-25_2edbacd070d1949bb5d97d3a6e4e23f6_mailto.exe

  • Size

    69KB

  • MD5

    2edbacd070d1949bb5d97d3a6e4e23f6

  • SHA1

    761168968a1d951848a36ad428ee4d05153f1e01

  • SHA256

    8894b6508e7b3d8759a53d0ac7a6ceb39fd63ba65b1e89be62b2acdce7781fdc

  • SHA512

    a4b282b8c91124a6dc465573842a03b5fcf346af6e561eef66ea405fcb784251044e2f8a2c0a61cbb0e29f7efc02a71d131930b70e2c021978d00c0b3c38f344

  • SSDEEP

    1536:juCWRxL7hbUiQfovecnXUU+hhOZuIWiFp+ZfaBZebC33O+MEYTb:KCWf7VJQfmeMXvkhOZu1iFBBZebC3+

Score
10/10
netwalkerransomwarespywarestealer

Malware Config

Extracted

Path

C:\Program Files\VideoLAN\VLC\lua\sd\4D0BA2-Readme.txt

Family

netwalker

Ransom Note
Hi! Your files are encrypted by Netwalker. All encrypted files for this computer has extension: .4d0ba2 -- If for some reason you read this text before the encryption ended, this can be understood by the fact that the computer slows down, and your heart rate has increased due to the ability to turn it off, then we recommend that you move away from the computer and accept that you have been compromised. Rebooting/shutdown will cause you to lose files without the possibility of recovery. -- Our encryption algorithms are very strong and your files are very well protected, the only way to get your files back is to cooperate with us and get the decrypter program. Do not try to recover your files without a decrypter program, you may damage them and then they will be impossible to recover. For us this is just business and to prove to you our seriousness, we will decrypt you one file for free. Just open our website, upload the encrypted file and get the decrypted file for free. -- Steps to get access on our website: 1.Download and install tor-browser: https://torproject.org/ 2.Open our website: pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion If the website is not available, open another one: rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion 3.Put your personal code in the input form: {code_4d0ba2: 0R+aJjGeh6aGEKLxw/kv+wX74xenX+tTIlQgD5qjgQ40xaKVfu Q3x0PUJTP1k+m/sO/E4Asn7Mw1H1zwKrMsuGTxzwBYvnYfq/a6 0l1TzrBIWCNu5wL6sSBgUofYKPOI/HemeSc2scQof/6y2H5DJl durrnEJJL2BMYb2t2hZpGMOQQwSRiZzywdVtbSs9NrLSD1JbiX 4eJrb9yez4KgbHrzFHFZMx2iMgqb3L5bZYiyWzNgmXNZdlPzAL Uanm1hUfX98LgaTM+UEdBFwf600/GZS7BFWSnC9A==}
URLs

http://pb36hu4spl6cyjdfhing7h3pw6dhpk32ifemawkujj4gp33ejzdq3did.onion

http://rnfdsgm6wb6j6su5txkekw4u4y47kp2eatvu7d6xhyn5cs4lt4pdrqqd.onion

Signatures

  • Netwalker Ransomware

    Ransomware family with multiple versions. Also known as MailTo.

    ransomwarenetwalker
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Renames multiple (7370) files with added filename extension

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

    ransomware
  • Deletes itself 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • Drops file in Program Files directory 64 IoCs
  • Interacts with shadow copies 2 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

    ransomware
  • Kills process with taskkill 1 IoCs
    evasion
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe delete shadows /all /quiet
    1⤵
    • Interacts with shadow copies
    PID:2100
  • C:\Users\Admin\AppData\Local\Temp\2024-02-25_2edbacd070d1949bb5d97d3a6e4e23f6_mailto.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-02-25_2edbacd070d1949bb5d97d3a6e4e23f6_mailto.exe"
    1⤵
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2860
    • C:\Windows\SysWOW64\notepad.exe
      C:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\4D0BA2-Readme.txt"
      2⤵
        PID:8940
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c "C:\Users\Admin\AppData\Local\Temp\C37E.tmp.bat"
        2⤵
        • Deletes itself
        • Suspicious use of WriteProcessMemory
        PID:6236
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /F /PID 2860
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:6276
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2364

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Program Files\VideoLAN\VLC\lua\sd\4D0BA2-Readme.txt
      Filesize

      1KB

      MD5

      4e317f50a3f094e65d2c4daf9eb68a51

      SHA1

      d6d3e272117a54b2c47f9c850a21f305c4d9ada1

      SHA256

      07457a91d0ed9541551d823ba45483aff1ab7d6d3378079fe99a5bd65cfa9e06

      SHA512

      a134a87d277d543a880befc906ca6557ed121293f9357431eaabfe7b90824d5d1f5316a2987361c4cb696f4c9cd8f248ee52c74a27ba836e72bbeb27df88bc8b

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    • C:\ProgramData\Microsoft\Assistance\Client\1.0\en-US\Help_CValidator.H1D.4d0ba2
      Filesize

      12KB

      MD5

      b2682a9f1fb7cfd6fa75c5a69b6f1307

      SHA1

      b3f4cf69e167502575201b0474a316b25440543f

      SHA256

      1e168c97cb2f656e50754fc730ba95ba53c8ec0a911b0725c1de62f0b62fcb7a

      SHA512

      bec1ba30dd04ce4d2dc2cb7d2455385d6be9a22d875b93b3c2ff974fa96cf03f1abdadf58377fc7ba0a271ef28c8920738efd0bdf34e5a75ff9acb07a092ea50

      Download Submit

    • C:\ProgramData\Microsoft\Assistance\Client\1.0\en-US\Help_MKWD_AssetId.H1W.4d0ba2
      Filesize

      229KB

      MD5

      3e62189811b8166f287de5dd1f11aa1b

      SHA1

      07c3767f5878bd48c807de85084e9e6864716e39

      SHA256

      8fc98469ca211bae34a06358e1b4977b223875cd36c25dc42790af630bcf2aed

      SHA512

      0ec67ae0375efbf9bf94fcb84737730897fcac25df9dff5981e9161c1f242a4ccdb2b97ce494a12645274d1f6dd4eeef8cd2868813a76fe8905e00246040da94

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    • C:\ProgramData\Microsoft\Assistance\Client\1.0\en-US\Help_MTOC_help.H1H.4d0ba2
      Filesize

      491KB

      MD5

      2486ccc4f054ddd1c5e974f6a93e9d2d

      SHA1

      da3e286d6438fe75d6581562ebe99d21ef1c4be0

      SHA256

      5f7a38f0c8dddefc3da8dd48b3579446462ac92b42f2c0a6f7431ff71cd46b04

      SHA512

      8c3ba393d33357f0dabb7ef618ca0d2b163a3cf45f994cb05319f4c45c863388fb0631a5287d189e55c2a21c8808dbd67658c2b7af94da3268af06b91bbc9ffa

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    • C:\ProgramData\Microsoft\Assistance\Client\1.0\en-US\Help_MValidator.H1D.4d0ba2
      Filesize

      14KB

      MD5

      84a54df477643c2584209791cab017f7

      SHA1

      e122af73a0c38456d24949e158bfe97460b93b91

      SHA256

      16a95124fd61587a1b66edc3f9ec753340892ca8a9e4793a34fd6f920dcf8904

      SHA512

      6a0442e84a774fee11147853e311f9aff297d869d47b62acc8482398e9d6a591d32ebdea46bcecebe61615a08dbd8642ae83152d7a154f640b89ecf4daa26f9e

      Download Submit

    • C:\ProgramData\Microsoft\Assistance\Client\1.0\en-US\Help_MValidator.Lck.4d0ba2
      Filesize

      284B

      MD5

      3640b4a19256bbe87558a18dfe96c0ae

      SHA1

      cab6ba10f4e842394c2754f47e1687f8d87d06e7

      SHA256

      a3771b81248d7b4aac1ad287825ac469499fa7a48eb1503caea895749bfd3a45

      SHA512

      acf970ce24dd1798e942af9ab1c26184119bb38644df66977baf56da02d65be84d664e02027fe293d257d900243ea19b8824e410a8cb990a3dd6cf9269fc2057

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    • C:\ProgramData\Microsoft\Assistance\Client\1.0\en-US\Help{9DAA54E8-CD95-4107-8E7F-BA3F24732D95}.H1Q.4d0ba2
      Filesize

      864KB

      MD5

      ffaa95c46928b0570b4f877301975ed3

      SHA1

      9146e4fc257d8169034c178147211dbe8478eeb4

      SHA256

      e4ccf24c99de1e1489f1d4f0675ea17171b6349a2db9a198fd9b3c655cddc3b2

      SHA512

      4b0f4cce21e067b174e43128b1e33e812972111bcf497eda09dd51655b4b0e0ea7e4c88b9eee419ad990bf66ffb9d15d1ddd9f5099df3d18eaf296359803bf0c

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    • C:\Users\Admin\AppData\Local\Temp\C37E.tmp.bat
      Filesize

      127B

      MD5

      da7687fa3d7ea026d0f5ec80f410a1ff

      SHA1

      80f3737ae2e62cb0a7149bb59691ed7b2bdd88f5

      SHA256

      9e80f4110f720a86733d9b84a0fe7ef5df633c67afca8be8ac995484d183ca97

      SHA512

      c7d023eaf85a11b182c3bbc97dde5fe28e73843a4aa2decd7c400ecb274532560be4309407b31aab1fd1189f930d8b09a22ee9dd6e36dce6013706f924d87316

      Download Submit