Analysis

  • max time kernel
    100s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    24/04/2022, 03:55

General

  • Target

    bb931f9995541cb3bc33facf9e11e1a3aecba42293ef7825d626cb028e503b27.exe

  • Size

    726KB

  • MD5

    d8f6e2d9acbbb213ee726d1772e4a838

  • SHA1

    1eb0d480d54af263fab7e0c1d55627264f3dd280

  • SHA256

    bb931f9995541cb3bc33facf9e11e1a3aecba42293ef7825d626cb028e503b27

  • SHA512

    9daffbee8477c014dbe3e7531fde84faf5c56b3c0fa20d23a82fab77e2c6a265864d3400fad745101a7e153b978125c9ce7d620c722e5528bbf3c97f07b1dca9

Malware Config

Extracted

Family

djvu

C2

http://fuyt.org/test1/get.php

Attributes
  • extension

    .msjd

  • offline_id

    Xe4NOamOTHZrARTiL9dfVzAylFrEWLGGbr2dngt1

  • payload_url

    http://zerit.top/dl/build2.exe

    http://fuyt.org/files/1/build3.exe

  • ransomnote

    ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-FT7BNVbXC9 Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0455JIjdm

rsa_pubkey.plain

Extracted

Family

vidar

Version

51.8

Botnet

517

C2

https://t.me/mm20220428

https://koyu.space/@ronxik123

Attributes
  • profile_id

    517

Signatures

  • Detected Djvu ransomware 8 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Vidar Stealer 5 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 2 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of WriteProcessMemory 37 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bb931f9995541cb3bc33facf9e11e1a3aecba42293ef7825d626cb028e503b27.exe
    "C:\Users\Admin\AppData\Local\Temp\bb931f9995541cb3bc33facf9e11e1a3aecba42293ef7825d626cb028e503b27.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3644
    • C:\Users\Admin\AppData\Local\Temp\bb931f9995541cb3bc33facf9e11e1a3aecba42293ef7825d626cb028e503b27.exe
      "C:\Users\Admin\AppData\Local\Temp\bb931f9995541cb3bc33facf9e11e1a3aecba42293ef7825d626cb028e503b27.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2580
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\24b9160b-ade5-47b6-9368-d87bed180bf5" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4304
      • C:\Users\Admin\AppData\Local\Temp\bb931f9995541cb3bc33facf9e11e1a3aecba42293ef7825d626cb028e503b27.exe
        "C:\Users\Admin\AppData\Local\Temp\bb931f9995541cb3bc33facf9e11e1a3aecba42293ef7825d626cb028e503b27.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4804
        • C:\Users\Admin\AppData\Local\Temp\bb931f9995541cb3bc33facf9e11e1a3aecba42293ef7825d626cb028e503b27.exe
          "C:\Users\Admin\AppData\Local\Temp\bb931f9995541cb3bc33facf9e11e1a3aecba42293ef7825d626cb028e503b27.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:4996
          • C:\Users\Admin\AppData\Local\445b8b1b-d287-4d91-bd72-2ba76cac612b\build2.exe
            "C:\Users\Admin\AppData\Local\445b8b1b-d287-4d91-bd72-2ba76cac612b\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:3960
            • C:\Users\Admin\AppData\Local\445b8b1b-d287-4d91-bd72-2ba76cac612b\build2.exe
              "C:\Users\Admin\AppData\Local\445b8b1b-d287-4d91-bd72-2ba76cac612b\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              PID:3656

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\ProgramData\mozglue.dll

          Filesize

          133KB

          MD5

          8f73c08a9660691143661bf7332c3c27

          SHA1

          37fa65dd737c50fda710fdbde89e51374d0c204a

          SHA256

          3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

          SHA512

          0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

        • C:\ProgramData\nss3.dll

          Filesize

          1.2MB

          MD5

          bfac4e3c5908856ba17d41edcd455a51

          SHA1

          8eec7e888767aa9e4cca8ff246eb2aacb9170428

          SHA256

          e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

          SHA512

          2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

          Filesize

          727B

          MD5

          ae80420644f9d17a1ceb04dfe52b4551

          SHA1

          aca7052dea384b8d31813c11839d16dcef04a4b5

          SHA256

          8893c680c876c7e9a453e301b2763e4310c2fc165bcb8e6cf23ae117f6cff476

          SHA512

          3f742909f7dc09e109f0eec4c245f3be76121dfdab494252eba5edb1907402cf7867cdc7595c529d3445a1676750aebbf9aba4df760ad58645aaf3d897a82a6d

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

          Filesize

          471B

          MD5

          4b48eeea719432bc0719653be71e6ecf

          SHA1

          41367524cf7d0c34d7737722cb2212558fca9938

          SHA256

          2d25e68537528a81bcadb24f24afda11671512a17d04ed304cf138a30b228866

          SHA512

          152b287e3d0c05f3b4dea98a20e1fc39a61008b3d5c4acc7632647bdffc090ef2ea76d4ec3a6d0cf3387c9f2f43fde1624f213908beb9583b6ad43429f551533

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

          Filesize

          402B

          MD5

          33f9d9b2aebce10c3560dd1847a865de

          SHA1

          d9e1b0c7e849118e646ee02972c8b3965b8720b1

          SHA256

          90463f9f01174e6159130fa60deb0894493d9361c56d0c488eb8b98a135706a0

          SHA512

          69593bbfc6e1301426e50b91c0bf2d29234e268070f5f31e17ddc8a7a47ecd5ba0d6e8f23e909f6907880e4578ceba2e43f5926125f653853b6dc3f4ffeec676

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

          Filesize

          396B

          MD5

          1a0b123f4f20bc88d961b545655ef2de

          SHA1

          caca5477da5baac3f16c1cbfdc31bdc26ec0ae48

          SHA256

          be0316a9094c0001fe02270684be9f06df2880a1fd0547b08d1dd909d52235cd

          SHA512

          a11f3d1e2b4a27ffe2554b27d6d7ae0c01ba577f86974e030ce87241be4d6f9730dbe619ca88c179f1c2b2908c3023ff0939b0a4806d86fe9053ced82beb03b2

        • C:\Users\Admin\AppData\Local\24b9160b-ade5-47b6-9368-d87bed180bf5\bb931f9995541cb3bc33facf9e11e1a3aecba42293ef7825d626cb028e503b27.exe

          Filesize

          726KB

          MD5

          d8f6e2d9acbbb213ee726d1772e4a838

          SHA1

          1eb0d480d54af263fab7e0c1d55627264f3dd280

          SHA256

          bb931f9995541cb3bc33facf9e11e1a3aecba42293ef7825d626cb028e503b27

          SHA512

          9daffbee8477c014dbe3e7531fde84faf5c56b3c0fa20d23a82fab77e2c6a265864d3400fad745101a7e153b978125c9ce7d620c722e5528bbf3c97f07b1dca9

        • C:\Users\Admin\AppData\Local\445b8b1b-d287-4d91-bd72-2ba76cac612b\build2.exe

          Filesize

          368KB

          MD5

          ad1b502b6714c0a374b055332018974b

          SHA1

          672f4e44475177ddcb1bfa73db3c5dee0f031bc2

          SHA256

          f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

          SHA512

          0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

        • C:\Users\Admin\AppData\Local\445b8b1b-d287-4d91-bd72-2ba76cac612b\build2.exe

          Filesize

          368KB

          MD5

          ad1b502b6714c0a374b055332018974b

          SHA1

          672f4e44475177ddcb1bfa73db3c5dee0f031bc2

          SHA256

          f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

          SHA512

          0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

        • C:\Users\Admin\AppData\Local\445b8b1b-d287-4d91-bd72-2ba76cac612b\build2.exe

          Filesize

          368KB

          MD5

          ad1b502b6714c0a374b055332018974b

          SHA1

          672f4e44475177ddcb1bfa73db3c5dee0f031bc2

          SHA256

          f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

          SHA512

          0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

        • memory/2580-134-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2580-131-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2580-132-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2580-136-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3644-135-0x00000000023B0000-0x00000000024CB000-memory.dmp

          Filesize

          1.1MB

        • memory/3644-133-0x000000000231A000-0x00000000023AC000-memory.dmp

          Filesize

          584KB

        • memory/3656-158-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/3656-155-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/3656-160-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/3656-161-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/3960-153-0x0000000000788000-0x00000000007B3000-memory.dmp

          Filesize

          172KB

        • memory/3960-157-0x0000000000788000-0x00000000007B3000-memory.dmp

          Filesize

          172KB

        • memory/3960-159-0x0000000000700000-0x0000000000749000-memory.dmp

          Filesize

          292KB

        • memory/4804-143-0x0000000000948000-0x00000000009DA000-memory.dmp

          Filesize

          584KB

        • memory/4996-149-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4996-144-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4996-142-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB