Analysis

  • max time kernel
    99s
  • max time network
    127s
  • platform
    windows10_x64
  • resource
    win10-20220414-en
  • submitted
    24/04/2022, 14:17

General

  • Target

    f414dbb5571c5f3725f0d52ce591e2bb6bd760616b0ace340777b5b3b0f22e57.exe

  • Size

    727KB

  • MD5

    fcd38ac32ff5e857bf55d0a1064de586

  • SHA1

    6b64eaff7b8b5bb62c1d63121457be9e74735312

  • SHA256

    f414dbb5571c5f3725f0d52ce591e2bb6bd760616b0ace340777b5b3b0f22e57

  • SHA512

    525a791d615479b28fd2e55c64118668006b1e1e06b74f8a3742edbc469f39084ece4c112bf9d14730f5ee7480645f23112536f12f59807327b5eefbd6d77290

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 10 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Vidar Stealer 6 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • 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\f414dbb5571c5f3725f0d52ce591e2bb6bd760616b0ace340777b5b3b0f22e57.exe
    "C:\Users\Admin\AppData\Local\Temp\f414dbb5571c5f3725f0d52ce591e2bb6bd760616b0ace340777b5b3b0f22e57.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3064
    • C:\Users\Admin\AppData\Local\Temp\f414dbb5571c5f3725f0d52ce591e2bb6bd760616b0ace340777b5b3b0f22e57.exe
      "C:\Users\Admin\AppData\Local\Temp\f414dbb5571c5f3725f0d52ce591e2bb6bd760616b0ace340777b5b3b0f22e57.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2616
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\9ab27e49-4828-46f1-b46b-a85a4f384866" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4028
      • C:\Users\Admin\AppData\Local\Temp\f414dbb5571c5f3725f0d52ce591e2bb6bd760616b0ace340777b5b3b0f22e57.exe
        "C:\Users\Admin\AppData\Local\Temp\f414dbb5571c5f3725f0d52ce591e2bb6bd760616b0ace340777b5b3b0f22e57.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4436
        • C:\Users\Admin\AppData\Local\Temp\f414dbb5571c5f3725f0d52ce591e2bb6bd760616b0ace340777b5b3b0f22e57.exe
          "C:\Users\Admin\AppData\Local\Temp\f414dbb5571c5f3725f0d52ce591e2bb6bd760616b0ace340777b5b3b0f22e57.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2160
          • C:\Users\Admin\AppData\Local\9582ec8a-2157-4e13-b7dc-2ef96e4bb12b\build2.exe
            "C:\Users\Admin\AppData\Local\9582ec8a-2157-4e13-b7dc-2ef96e4bb12b\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:4184
            • C:\Users\Admin\AppData\Local\9582ec8a-2157-4e13-b7dc-2ef96e4bb12b\build2.exe
              "C:\Users\Admin\AppData\Local\9582ec8a-2157-4e13-b7dc-2ef96e4bb12b\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              PID:5072

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          727B

          MD5

          d9c694c2d95c6812aa0be903de46da96

          SHA1

          df1a733a9c6c27997c798ae4c5715cabe1ffa5e4

          SHA256

          f6f85bc0d1770803a206fbfb83c4cb888b3a24b494feac38baa3ea764cda37c0

          SHA512

          97a2eddf197aa74d1d05241008ead092f836b561bc1ad1d731d91db23d6dcce7a65d3dc1609384a3ad3fd5c858bae6c3a4361588b5a965ebf233f14410864793

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

          Filesize

          471B

          MD5

          ad8e032271f02af2a955ce10661cc3a8

          SHA1

          967d1bd99bea34c3110cc75c0c0d8b8565eae9f9

          SHA256

          d5081bf75d530e9336a6da0f9142bc10f4d06368c365cf0e33f7c99b0f643ce8

          SHA512

          bc69dfb03284cf1b8d172ff55938f238b928a0c7846306d8232ab697f54c771a9acf8b0e04a85e149da87ea8cfd9395605d0d95afc30eae1793e91399aa7eef7

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

          Filesize

          402B

          MD5

          c1cf12409d2d65269a8f8cacf026431d

          SHA1

          805672dae16022ebc60b631de85684bb7a18ba24

          SHA256

          dfcea0388e5150429652b02f5eb5729edb917c3c631ba5b9c684643f7db1da9b

          SHA512

          0d83d829c701658fb131f48c86ba29a55987ec8770fc21ff3c63e58d5dd3207f31f598a6d06e2eb81937170f0ee2ca402d019e3df71fc0add21be801f5bc43ea

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

          Filesize

          396B

          MD5

          694178d8bbd2593280057cf699d01ef1

          SHA1

          3436b2b1f03f7c21c1dc0ec7cf836d7122cef2fe

          SHA256

          b6a9026b75d2d42d374d00ebb4f563a9e229bb0fbe456638834769ddd27884fb

          SHA512

          89c62c00c0e9cc218b0e26471d75595c2d042460f9ce4a5884bc39d02fc0ae7640c7101432961dfc421eb1eca9923fd8b93e77858a3c88b953ad013e996a9060

        • C:\Users\Admin\AppData\Local\9582ec8a-2157-4e13-b7dc-2ef96e4bb12b\build2.exe

          Filesize

          368KB

          MD5

          ad1b502b6714c0a374b055332018974b

          SHA1

          672f4e44475177ddcb1bfa73db3c5dee0f031bc2

          SHA256

          f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

          SHA512

          0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

        • C:\Users\Admin\AppData\Local\9582ec8a-2157-4e13-b7dc-2ef96e4bb12b\build2.exe

          Filesize

          368KB

          MD5

          ad1b502b6714c0a374b055332018974b

          SHA1

          672f4e44475177ddcb1bfa73db3c5dee0f031bc2

          SHA256

          f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

          SHA512

          0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

        • C:\Users\Admin\AppData\Local\9582ec8a-2157-4e13-b7dc-2ef96e4bb12b\build2.exe

          Filesize

          368KB

          MD5

          ad1b502b6714c0a374b055332018974b

          SHA1

          672f4e44475177ddcb1bfa73db3c5dee0f031bc2

          SHA256

          f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

          SHA512

          0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

        • C:\Users\Admin\AppData\Local\9ab27e49-4828-46f1-b46b-a85a4f384866\f414dbb5571c5f3725f0d52ce591e2bb6bd760616b0ace340777b5b3b0f22e57.exe

          Filesize

          727KB

          MD5

          fcd38ac32ff5e857bf55d0a1064de586

          SHA1

          6b64eaff7b8b5bb62c1d63121457be9e74735312

          SHA256

          f414dbb5571c5f3725f0d52ce591e2bb6bd760616b0ace340777b5b3b0f22e57

          SHA512

          525a791d615479b28fd2e55c64118668006b1e1e06b74f8a3742edbc469f39084ece4c112bf9d14730f5ee7480645f23112536f12f59807327b5eefbd6d77290

        • \ProgramData\mozglue.dll

          Filesize

          133KB

          MD5

          8f73c08a9660691143661bf7332c3c27

          SHA1

          37fa65dd737c50fda710fdbde89e51374d0c204a

          SHA256

          3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

          SHA512

          0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

        • \ProgramData\nss3.dll

          Filesize

          1.2MB

          MD5

          bfac4e3c5908856ba17d41edcd455a51

          SHA1

          8eec7e888767aa9e4cca8ff246eb2aacb9170428

          SHA256

          e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

          SHA512

          2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

        • memory/2160-137-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2160-131-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2160-132-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2616-124-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2616-121-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2616-123-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/2616-118-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/3064-120-0x0000000002180000-0x0000000002219000-memory.dmp

          Filesize

          612KB

        • memory/3064-122-0x0000000002220000-0x000000000233B000-memory.dmp

          Filesize

          1.1MB

        • memory/4184-146-0x0000000000646000-0x0000000000670000-memory.dmp

          Filesize

          168KB

        • memory/4184-147-0x00000000020D0000-0x0000000002119000-memory.dmp

          Filesize

          292KB

        • memory/4184-141-0x0000000000646000-0x0000000000670000-memory.dmp

          Filesize

          168KB

        • memory/5072-142-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/5072-145-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/5072-148-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/5072-149-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB