Analysis

  • max time kernel
    143s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/04/2024, 14:05

General

  • Target

    fef491847fea476ce4910e8329222c0c93ec47d5f6a70a49e7f789f17357e0cc.exe

  • Size

    719KB

  • MD5

    2586b7ef106deb2efb860a230f639dc1

  • SHA1

    fb9bba0d2ed657645e1b6a286c0f066d272fdab6

  • SHA256

    fef491847fea476ce4910e8329222c0c93ec47d5f6a70a49e7f789f17357e0cc

  • SHA512

    4f475ddc773314430c61536c71e1dcd30759aedbdb8aaa057259cf8e158b8786606a178047671cdee81d4e345aca93aaf45ff2f56007b46e564170f574452f58

  • SSDEEP

    12288:K9i0rSnYWlRKVAe9km7LVk0nXxdx0cMOGzeb1+C7uKEB6TI53o8Xx7OheIbf:eigWRMAM7Lue9QOYebZyx4Eo8hahr

Malware Config

Extracted

Family

djvu

C2

http://sajdfue.com/test2/get.php

Attributes
  • extension

    .uazq

  • offline_id

    Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1

  • payload_url

    http://sdfjhuz.com/dl/build2.exe

    http://sajdfue.com/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. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/df01994dd8d37c2c33469922f8e7155a20240402134014/fd95b0 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. 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: 0860PsawqS

rsa_pubkey.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199658817715

https://t.me/sa9ok

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Signatures

  • Detect Vidar Stealer 5 IoCs
  • Detected Djvu ransomware 16 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 7 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • 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 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fef491847fea476ce4910e8329222c0c93ec47d5f6a70a49e7f789f17357e0cc.exe
    "C:\Users\Admin\AppData\Local\Temp\fef491847fea476ce4910e8329222c0c93ec47d5f6a70a49e7f789f17357e0cc.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4012
    • C:\Users\Admin\AppData\Local\Temp\fef491847fea476ce4910e8329222c0c93ec47d5f6a70a49e7f789f17357e0cc.exe
      "C:\Users\Admin\AppData\Local\Temp\fef491847fea476ce4910e8329222c0c93ec47d5f6a70a49e7f789f17357e0cc.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4432
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\391ea532-a26b-4411-b481-ca419711df5a" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2508
      • C:\Users\Admin\AppData\Local\Temp\fef491847fea476ce4910e8329222c0c93ec47d5f6a70a49e7f789f17357e0cc.exe
        "C:\Users\Admin\AppData\Local\Temp\fef491847fea476ce4910e8329222c0c93ec47d5f6a70a49e7f789f17357e0cc.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:116
        • C:\Users\Admin\AppData\Local\Temp\fef491847fea476ce4910e8329222c0c93ec47d5f6a70a49e7f789f17357e0cc.exe
          "C:\Users\Admin\AppData\Local\Temp\fef491847fea476ce4910e8329222c0c93ec47d5f6a70a49e7f789f17357e0cc.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:3252
          • C:\Users\Admin\AppData\Local\ac8579bd-7c85-498b-8361-828b48c15eb0\build2.exe
            "C:\Users\Admin\AppData\Local\ac8579bd-7c85-498b-8361-828b48c15eb0\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:3088
            • C:\Users\Admin\AppData\Local\ac8579bd-7c85-498b-8361-828b48c15eb0\build2.exe
              "C:\Users\Admin\AppData\Local\ac8579bd-7c85-498b-8361-828b48c15eb0\build2.exe"
              6⤵
              • Executes dropped EXE
              PID:2696
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 2696 -s 2056
                7⤵
                • Program crash
                PID:4444
          • C:\Users\Admin\AppData\Local\ac8579bd-7c85-498b-8361-828b48c15eb0\build3.exe
            "C:\Users\Admin\AppData\Local\ac8579bd-7c85-498b-8361-828b48c15eb0\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:4380
            • C:\Users\Admin\AppData\Local\ac8579bd-7c85-498b-8361-828b48c15eb0\build3.exe
              "C:\Users\Admin\AppData\Local\ac8579bd-7c85-498b-8361-828b48c15eb0\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:3176
              • C:\Windows\SysWOW64\schtasks.exe
                /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
                7⤵
                • Creates scheduled task(s)
                PID:2888
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2696 -ip 2696
    1⤵
      PID:2348
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:1596
      • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        2⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:4516
        • C:\Windows\SysWOW64\schtasks.exe
          /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
          3⤵
          • Creates scheduled task(s)
          PID:3144
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      1⤵
      • Executes dropped EXE
      PID:2320

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

      Filesize

      1KB

      MD5

      e7fd6384933fe25e01a736dedb13b171

      SHA1

      d05a1548b5e36cafeb7a1eea0446f5d32a4d6602

      SHA256

      152415db33fa59517ba5f8460019b4e95c59255cd6541faa35b089d97bd039e1

      SHA512

      75e9855d55f893a181839509f7f3f42f0457567a4fae8653eaa451d99a8454a042ec08d0a069f1ca55cf89179c08bf0e3d931a27c1fcc5309c5f1930aee24866

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

      Filesize

      724B

      MD5

      8202a1cd02e7d69597995cabbe881a12

      SHA1

      8858d9d934b7aa9330ee73de6c476acf19929ff6

      SHA256

      58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

      SHA512

      97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

      Filesize

      410B

      MD5

      b6c5f2f70ab55d3e33eb77674fe9cd5c

      SHA1

      198b5044d4bcfa858b55fd0d9f6deb4724267e5b

      SHA256

      cd8908d4d98256e8b51d849372bf21a7c759c85b6e5d0547b5da69fc96850cdf

      SHA512

      1ad8a1c4ec49b1bf701cf0803033a9325d4b158af61bfee471f4f767789724d46e543ea907225a336f714f1503c80c2bbf992858f3d14a444b5ff9682d8c1a91

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

      Filesize

      392B

      MD5

      f042319ae5322741be02fbba441e968d

      SHA1

      025385772039d1355c9e2cc6bff449141d59874e

      SHA256

      c38f73ea28ae29d3aa971ea02abc09b7e300be200c9dcac5214b91c56bed0d39

      SHA512

      49d7b54843c155efc808cdac5316115e5384783a28743afa8fdc1b1dac59830b54172635c3d1242f44e2237508537d2b9987721c75caad029bd6b0c910ae9116

    • C:\Users\Admin\AppData\Local\391ea532-a26b-4411-b481-ca419711df5a\fef491847fea476ce4910e8329222c0c93ec47d5f6a70a49e7f789f17357e0cc.exe

      Filesize

      719KB

      MD5

      2586b7ef106deb2efb860a230f639dc1

      SHA1

      fb9bba0d2ed657645e1b6a286c0f066d272fdab6

      SHA256

      fef491847fea476ce4910e8329222c0c93ec47d5f6a70a49e7f789f17357e0cc

      SHA512

      4f475ddc773314430c61536c71e1dcd30759aedbdb8aaa057259cf8e158b8786606a178047671cdee81d4e345aca93aaf45ff2f56007b46e564170f574452f58

    • C:\Users\Admin\AppData\Local\ac8579bd-7c85-498b-8361-828b48c15eb0\build2.exe

      Filesize

      265KB

      MD5

      97563a191c32200a6f0dff251bdd40f8

      SHA1

      1d8bd22c19d703349428d0c8c9c8c10a1d068f50

      SHA256

      2389dff2f3f5459ebb8110c01eeedee11ce0c75c3bb735f6f5f76f8a7bb6e9f6

      SHA512

      810ada6b966b6bc58dfc980a49ee6a5d4482af338a47a567ca659ccf65d1834506792f39a12b45cd5f6dd138ed4e943ee8d6ef1ac45ee59ab217696ad9ae5ed8

    • C:\Users\Admin\AppData\Local\ac8579bd-7c85-498b-8361-828b48c15eb0\build3.exe

      Filesize

      299KB

      MD5

      41b883a061c95e9b9cb17d4ca50de770

      SHA1

      1daf96ec21d53d9a4699cea9b4db08cda6fbb5ad

      SHA256

      fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408

      SHA512

      cdd1bb3a36182575cd715a52815765161eeaa3849e72c1c2a9a4e84cc43af9f8ec4997e642702bb3de41f162d2e8fd8717f6f8302bba5306821ee4d155626319

    • memory/116-18-0x0000000004800000-0x0000000004896000-memory.dmp

      Filesize

      600KB

    • memory/1596-102-0x0000000000980000-0x0000000000A80000-memory.dmp

      Filesize

      1024KB

    • memory/2696-57-0x0000000000400000-0x0000000000648000-memory.dmp

      Filesize

      2.3MB

    • memory/2696-53-0x0000000000400000-0x0000000000648000-memory.dmp

      Filesize

      2.3MB

    • memory/2696-52-0x0000000000400000-0x0000000000648000-memory.dmp

      Filesize

      2.3MB

    • memory/2696-48-0x0000000000400000-0x0000000000648000-memory.dmp

      Filesize

      2.3MB

    • memory/3088-50-0x00000000021A0000-0x00000000021D5000-memory.dmp

      Filesize

      212KB

    • memory/3088-47-0x00000000005F0000-0x00000000006F0000-memory.dmp

      Filesize

      1024KB

    • memory/3176-83-0x0000000000400000-0x0000000000406000-memory.dmp

      Filesize

      24KB

    • memory/3176-80-0x0000000000400000-0x0000000000406000-memory.dmp

      Filesize

      24KB

    • memory/3176-84-0x0000000000400000-0x0000000000406000-memory.dmp

      Filesize

      24KB

    • memory/3176-86-0x0000000000410000-0x00000000004D9000-memory.dmp

      Filesize

      804KB

    • memory/3252-20-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3252-70-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3252-34-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3252-32-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3252-28-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3252-27-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3252-22-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3252-21-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3252-74-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/3252-35-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4012-1-0x0000000004970000-0x0000000004A09000-memory.dmp

      Filesize

      612KB

    • memory/4012-2-0x0000000004AF0000-0x0000000004C0B000-memory.dmp

      Filesize

      1.1MB

    • memory/4380-78-0x0000000000840000-0x0000000000940000-memory.dmp

      Filesize

      1024KB

    • memory/4380-79-0x0000000000830000-0x0000000000834000-memory.dmp

      Filesize

      16KB

    • memory/4432-15-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4432-6-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4432-5-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4432-4-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4432-3-0x0000000000400000-0x0000000000537000-memory.dmp

      Filesize

      1.2MB

    • memory/4516-104-0x0000000000400000-0x0000000000406000-memory.dmp

      Filesize

      24KB