Analysis

  • max time kernel
    143s
  • max time network
    144s
  • platform
    windows10_x64
  • resource
    win10-20220414-en
  • submitted
    23/04/2022, 22:10

General

  • Target

    43f7bfb2f186a0c13ca0880e8318997d1f00e100cc36dd3ac58954b7b4849535.exe

  • Size

    726KB

  • MD5

    b87694fa71716e4a1ad2779273215b7a

  • SHA1

    08bc71052d36690a101d344643980ad9306c4649

  • SHA256

    43f7bfb2f186a0c13ca0880e8318997d1f00e100cc36dd3ac58954b7b4849535

  • SHA512

    0ffc6a3719098480e997c8e6976a52b4038a1449a382c4e8562f27313a889bfd10de81aaf2685d706322511d4e3fde618b6a200ee35007921b844331cffd44a7

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 5 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\43f7bfb2f186a0c13ca0880e8318997d1f00e100cc36dd3ac58954b7b4849535.exe
    "C:\Users\Admin\AppData\Local\Temp\43f7bfb2f186a0c13ca0880e8318997d1f00e100cc36dd3ac58954b7b4849535.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1840
    • C:\Users\Admin\AppData\Local\Temp\43f7bfb2f186a0c13ca0880e8318997d1f00e100cc36dd3ac58954b7b4849535.exe
      "C:\Users\Admin\AppData\Local\Temp\43f7bfb2f186a0c13ca0880e8318997d1f00e100cc36dd3ac58954b7b4849535.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1620
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\ff3ff6e2-1847-446f-994d-4bfb0b666b78" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2740
      • C:\Users\Admin\AppData\Local\Temp\43f7bfb2f186a0c13ca0880e8318997d1f00e100cc36dd3ac58954b7b4849535.exe
        "C:\Users\Admin\AppData\Local\Temp\43f7bfb2f186a0c13ca0880e8318997d1f00e100cc36dd3ac58954b7b4849535.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2844
        • C:\Users\Admin\AppData\Local\Temp\43f7bfb2f186a0c13ca0880e8318997d1f00e100cc36dd3ac58954b7b4849535.exe
          "C:\Users\Admin\AppData\Local\Temp\43f7bfb2f186a0c13ca0880e8318997d1f00e100cc36dd3ac58954b7b4849535.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:4012
          • C:\Users\Admin\AppData\Local\c9d596c4-daaf-4ba5-9545-b25c85485858\build2.exe
            "C:\Users\Admin\AppData\Local\c9d596c4-daaf-4ba5-9545-b25c85485858\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:2112
            • C:\Users\Admin\AppData\Local\c9d596c4-daaf-4ba5-9545-b25c85485858\build2.exe
              "C:\Users\Admin\AppData\Local\c9d596c4-daaf-4ba5-9545-b25c85485858\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              PID:4648

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

          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

          3a077a0d48d02b965c440a8c38fa70be

          SHA1

          90e2028f73b743dd476dfe6047be88f5c8f00c0c

          SHA256

          4a736a82397acafa1cc4dbe46a393b0131f7d69294d2b6a33372794518db20dd

          SHA512

          2514eef6b31ee2f4073b808ac979a548be1391aee6a2e5845010f5cca03bfe94a0679ed3abcd3cfd826d20916a0eba7f20ecaeda557b967c9a71c167cc05dc77

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

          Filesize

          396B

          MD5

          73b717d2c9fd871731bbe50b3e7d8369

          SHA1

          63bb9de52c5d7ccd501c8d395f4b1e9f7e542b78

          SHA256

          3c97295c72a655c14bb418c66dc15733d1d276c16300e47d69089a8474a486e3

          SHA512

          deaf823da5a3b52f66aa8bcbcfa95eec2e5a48487785b2109545ab75e50dccf00289dbb0055c1a5ee38d5974cf6c73b20a259c04480af2ab4470484e29770e23

        • C:\Users\Admin\AppData\Local\c9d596c4-daaf-4ba5-9545-b25c85485858\build2.exe

          Filesize

          368KB

          MD5

          ad1b502b6714c0a374b055332018974b

          SHA1

          672f4e44475177ddcb1bfa73db3c5dee0f031bc2

          SHA256

          f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

          SHA512

          0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

        • C:\Users\Admin\AppData\Local\c9d596c4-daaf-4ba5-9545-b25c85485858\build2.exe

          Filesize

          368KB

          MD5

          ad1b502b6714c0a374b055332018974b

          SHA1

          672f4e44475177ddcb1bfa73db3c5dee0f031bc2

          SHA256

          f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

          SHA512

          0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

        • C:\Users\Admin\AppData\Local\c9d596c4-daaf-4ba5-9545-b25c85485858\build2.exe

          Filesize

          368KB

          MD5

          ad1b502b6714c0a374b055332018974b

          SHA1

          672f4e44475177ddcb1bfa73db3c5dee0f031bc2

          SHA256

          f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95

          SHA512

          0197d74e6eb9fa11d48e6939dbd091c6896908870a59fef1d40830e43caf2539fd03ac933d47eae4c3b0ec74e2bfb0ece7f44c4a525b075fe4235ca6086c355e

        • C:\Users\Admin\AppData\Local\ff3ff6e2-1847-446f-994d-4bfb0b666b78\43f7bfb2f186a0c13ca0880e8318997d1f00e100cc36dd3ac58954b7b4849535.exe

          Filesize

          726KB

          MD5

          b87694fa71716e4a1ad2779273215b7a

          SHA1

          08bc71052d36690a101d344643980ad9306c4649

          SHA256

          43f7bfb2f186a0c13ca0880e8318997d1f00e100cc36dd3ac58954b7b4849535

          SHA512

          0ffc6a3719098480e997c8e6976a52b4038a1449a382c4e8562f27313a889bfd10de81aaf2685d706322511d4e3fde618b6a200ee35007921b844331cffd44a7

        • \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/1620-120-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1620-118-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1620-123-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1620-122-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/1840-121-0x0000000002220000-0x000000000233B000-memory.dmp

          Filesize

          1.1MB

        • memory/2112-144-0x0000000000706000-0x0000000000731000-memory.dmp

          Filesize

          172KB

        • memory/4012-131-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4012-136-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4012-130-0x0000000000400000-0x0000000000537000-memory.dmp

          Filesize

          1.2MB

        • memory/4648-145-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/4648-146-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/4648-147-0x0000000060900000-0x0000000060992000-memory.dmp

          Filesize

          584KB

        • memory/4648-143-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB

        • memory/4648-140-0x0000000000400000-0x000000000044C000-memory.dmp

          Filesize

          304KB