Analysis

  • max time kernel
    120s
  • max time network
    148s
  • platform
    windows10_x64
  • resource
    win10-20220414-en
  • submitted
    23/04/2022, 16:32

General

  • Target
    95fd41b94b215a7d1c210f19a00c897c179626f259af3ec7199773fa005b3bf0.exe
  • Size 726KB
  • Sample220423-t2e5dsdcf5
  • SHA256 95fd41b94b215a7d1c210f19a00c897c179626f259af3ec7199773fa005b3bf0
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • djvu

C2
  • http://fuyt.org/fhsgtsspen6/get.php

Attributes
  • extension

    .dmay

  • 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: 0458JIjdm

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 2 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\95fd41b94b215a7d1c210f19a00c897c179626f259af3ec7199773fa005b3bf0.exe
    "C:\Users\Admin\AppData\Local\Temp\95fd41b94b215a7d1c210f19a00c897c179626f259af3ec7199773fa005b3bf0.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3224
    • C:\Users\Admin\AppData\Local\Temp\95fd41b94b215a7d1c210f19a00c897c179626f259af3ec7199773fa005b3bf0.exe
      "C:\Users\Admin\AppData\Local\Temp\95fd41b94b215a7d1c210f19a00c897c179626f259af3ec7199773fa005b3bf0.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3720
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\bda407c1-08cc-4b8d-95e8-f490ddb3027b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4824
      • C:\Users\Admin\AppData\Local\Temp\95fd41b94b215a7d1c210f19a00c897c179626f259af3ec7199773fa005b3bf0.exe
        "C:\Users\Admin\AppData\Local\Temp\95fd41b94b215a7d1c210f19a00c897c179626f259af3ec7199773fa005b3bf0.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4848
        • C:\Users\Admin\AppData\Local\Temp\95fd41b94b215a7d1c210f19a00c897c179626f259af3ec7199773fa005b3bf0.exe
          "C:\Users\Admin\AppData\Local\Temp\95fd41b94b215a7d1c210f19a00c897c179626f259af3ec7199773fa005b3bf0.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2096
          • C:\Users\Admin\AppData\Local\1bc8940c-24ff-4146-aa69-df51ba899b87\build2.exe
            "C:\Users\Admin\AppData\Local\1bc8940c-24ff-4146-aa69-df51ba899b87\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:4340
            • C:\Users\Admin\AppData\Local\1bc8940c-24ff-4146-aa69-df51ba899b87\build2.exe
              "C:\Users\Admin\AppData\Local\1bc8940c-24ff-4146-aa69-df51ba899b87\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Checks processor information in registry
              • Suspicious behavior: EnumeratesProcesses
              PID:1340

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        build2.exe

        • Path C:\Users\Admin\AppData\Local\1bc8940c-24ff-4146-aa69-df51ba899b87\build2.exe
        • Size 368KB
        • SHA256 f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\1bc8940c-24ff-4146-aa69-df51ba899b87\build2.exe
        • Size 368KB
        • SHA256 f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\1bc8940c-24ff-4146-aa69-df51ba899b87\build2.exe
        • Size 368KB
        • SHA256 f2cfbc265125aca3cbf385120f7489e8044f444976ba43ee3a19e706257c9e95
        • MD5 SHA1 SHA512 SSDEEP

        95fd41b94b215a7d1c210f19a00c897c179626f259af3ec7199773fa005b3bf0.exe

        • Path C:\Users\Admin\AppData\Local\bda407c1-08cc-4b8d-95e8-f490ddb3027b\95fd41b94b215a7d1c210f19a00c897c179626f259af3ec7199773fa005b3bf0.exe
        • Size 726KB
        • SHA256 95fd41b94b215a7d1c210f19a00c897c179626f259af3ec7199773fa005b3bf0
        • MD5 SHA1 SHA512 SSDEEP

        mozglue.dll

        • Path \ProgramData\mozglue.dll
        • Size 133KB
        • SHA256 3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
        • MD5 SHA1 SHA512 SSDEEP

        nss3.dll

        • Path \ProgramData\nss3.dll
        • Size 1.2MB
        • SHA256 e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
        • MD5 SHA1 SHA512 SSDEEP

        memory/1340-143-0x0000000000400000-0x000000000044C000-memory.dmp

        memory/1340-142-0x0000000000400000-0x000000000044C000-memory.dmp

        memory/1340-140-0x0000000000400000-0x000000000044C000-memory.dmp

        memory/1340-137-0x0000000000400000-0x000000000044C000-memory.dmp

        memory/2096-132-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2096-131-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2096-130-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3224-121-0x00000000022C0000-0x00000000023DB000-memory.dmp

        memory/3720-123-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3720-122-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3720-120-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3720-118-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4340-136-0x00000000007B6000-0x00000000007E0000-memory.dmp

        memory/4340-141-0x00000000007B6000-0x00000000007E0000-memory.dmp