Analysis

  • max time kernel
    146s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240319-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/03/2024, 01:56

General

  • Target
    df0c257665d04aed4cf830fbfcf4e088694ef9ddeecfe2d783dcb762f70b03f0.exe
  • Size 757KB
  • Sample240330-cc5kbaee7t
  • SHA256 df0c257665d04aed4cf830fbfcf4e088694ef9ddeecfe2d783dcb762f70b03f0
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • djvu

C2
  • http://sajdfue.com/test1/get.php

Attributes
  • extension

    .vook

  • offline_id

    1eSPzWRaNslCgtjBZfL5pzvovoiaVI4IZSnvAwt1

  • 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/3ed7a617738550b0a00c5aa231c0752020240316170955/d71ce1 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: 0857PsawqS

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.

  • Detect binaries embedding considerable number of MFA browser extension IDs. 1 IoCs
  • Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 1 IoCs
  • Detects Windows executables referencing non-Windows User-Agents 4 IoCs
  • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 1 IoCs
  • Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 4 IoCs
  • 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 2 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 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\df0c257665d04aed4cf830fbfcf4e088694ef9ddeecfe2d783dcb762f70b03f0.exe
    "C:\Users\Admin\AppData\Local\Temp\df0c257665d04aed4cf830fbfcf4e088694ef9ddeecfe2d783dcb762f70b03f0.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3972
    • C:\Users\Admin\AppData\Local\Temp\df0c257665d04aed4cf830fbfcf4e088694ef9ddeecfe2d783dcb762f70b03f0.exe
      "C:\Users\Admin\AppData\Local\Temp\df0c257665d04aed4cf830fbfcf4e088694ef9ddeecfe2d783dcb762f70b03f0.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1948
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\95e256f9-b68c-4769-84f0-b374327f7ba0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:3900
      • C:\Users\Admin\AppData\Local\Temp\df0c257665d04aed4cf830fbfcf4e088694ef9ddeecfe2d783dcb762f70b03f0.exe
        "C:\Users\Admin\AppData\Local\Temp\df0c257665d04aed4cf830fbfcf4e088694ef9ddeecfe2d783dcb762f70b03f0.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3568
        • C:\Users\Admin\AppData\Local\Temp\df0c257665d04aed4cf830fbfcf4e088694ef9ddeecfe2d783dcb762f70b03f0.exe
          "C:\Users\Admin\AppData\Local\Temp\df0c257665d04aed4cf830fbfcf4e088694ef9ddeecfe2d783dcb762f70b03f0.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Checks computer location settings
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:3400
          • C:\Users\Admin\AppData\Local\a2bb9a06-66c3-403a-8a08-7283b213342e\build2.exe
            "C:\Users\Admin\AppData\Local\a2bb9a06-66c3-403a-8a08-7283b213342e\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:4092
            • C:\Users\Admin\AppData\Local\a2bb9a06-66c3-403a-8a08-7283b213342e\build2.exe
              "C:\Users\Admin\AppData\Local\a2bb9a06-66c3-403a-8a08-7283b213342e\build2.exe"
              6⤵
              • Executes dropped EXE
              PID:2216
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 2216 -s 2256
                7⤵
                • Program crash
                PID:1040
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 2216 -ip 2216
    1⤵
      PID:4892
    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3756 --field-trial-handle=2232,i,9772508353233483703,11473701862007458502,262144 --variations-seed-version /prefetch:8
      1⤵
        PID:944

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

            • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
            • Size 1KB
            • SHA256 78bf28ca0ad706fc2653479af92267b45e1d0ea52aa6524c57d0a73473b569bf
            • MD5 SHA1 SHA512

            CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

            • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
            • Size 724B
            • SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
            • MD5 SHA1 SHA512

            24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

            • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
            • Size 410B
            • SHA256 d340cf5ae3ae54daa10d2cc2227467f9b152900f1794dfe90346ea2d28edbc64
            • MD5 SHA1 SHA512

            CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

            • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
            • Size 392B
            • SHA256 077a0a13be98cbdabcd2eb82335e1bf708c60c31ad3c9a055fe1c609cfe46388
            • MD5 SHA1 SHA512

            df0c257665d04aed4cf830fbfcf4e088694ef9ddeecfe2d783dcb762f70b03f0.exe

            • Path C:\Users\Admin\AppData\Local\95e256f9-b68c-4769-84f0-b374327f7ba0\df0c257665d04aed4cf830fbfcf4e088694ef9ddeecfe2d783dcb762f70b03f0.exe
            • Size 757KB
            • SHA256 df0c257665d04aed4cf830fbfcf4e088694ef9ddeecfe2d783dcb762f70b03f0
            • MD5 SHA1 SHA512 SSDEEP

            build2.exe

            • Path C:\Users\Admin\AppData\Local\a2bb9a06-66c3-403a-8a08-7283b213342e\build2.exe
            • Size 265KB
            • SHA256 2389dff2f3f5459ebb8110c01eeedee11ce0c75c3bb735f6f5f76f8a7bb6e9f6
            • MD5 SHA1 SHA512 SSDEEP

            build3.exe

            • Path C:\Users\Admin\AppData\Local\a2bb9a06-66c3-403a-8a08-7283b213342e\build3.exe
            • Size 1KB
            • SHA256 ee2a8bc950324dd2b44c157097c8d657a74d3e9b5518076ca0ef6e8b1c0f2657
            • MD5 SHA1 SHA512

            memory/1948-5-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/1948-15-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/1948-6-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/1948-3-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/1948-4-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/2216-49-0x0000000000400000-0x0000000000648000-memory.dmp

            memory/2216-52-0x0000000000400000-0x0000000000648000-memory.dmp

            memory/2216-69-0x0000000000400000-0x0000000000648000-memory.dmp

            memory/2216-53-0x0000000000400000-0x0000000000648000-memory.dmp

            memory/3400-27-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/3400-32-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/3400-34-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/3400-35-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/3400-72-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/3400-21-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/3400-68-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/3400-20-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/3400-28-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/3400-22-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/3568-18-0x00000000027C0000-0x0000000002854000-memory.dmp

            memory/3972-2-0x00000000029E0000-0x0000000002AFB000-memory.dmp

            memory/3972-1-0x0000000002940000-0x00000000029DB000-memory.dmp

            memory/4092-48-0x00000000006C0000-0x00000000006F5000-memory.dmp

            memory/4092-47-0x0000000000730000-0x0000000000830000-memory.dmp