Analysis

  • max time kernel
    146s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230703-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/08/2023, 11:42

General

  • Target
    aacc6a6512230da99d11da39e9f8b97fbfc294aea6b7d6886e92e0320e5a3f42.exe
  • Size 784KB
  • Sample230806-nvf58abc8x
  • SHA256 aacc6a6512230da99d11da39e9f8b97fbfc294aea6b7d6886e92e0320e5a3f42
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • djvu

C2
  • http://zexeq.com/test1/get.php

Attributes
  • extension

    .yyza

  • offline_id

    UcKp2U8xIAuhirf1rVzlXed6KBYXf0O1WXF2njt1

  • payload_url

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

    http://zexeq.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. You can get and look video overview decrypt tool: https://we.tl/t-xZJtZ8PDb2 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: 0756JOsie

rsa_pubkey.plain

Extracted

Family
  • vidar

Version
  • 5

Botnet
  • 183caee054f0a0bfc81780194d9bc7cb

C2
  • https://t.me/versozaline

  • https://steamcommunity.com/profiles/76561199532186526

Attributes
  • profile_id_v2

    183caee054f0a0bfc81780194d9bc7cb

  • user_agent

    Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/111.0

Signatures

  • 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
  • Executes dropped EXE 4 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
  • 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).

  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of WriteProcessMemory 53 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\aacc6a6512230da99d11da39e9f8b97fbfc294aea6b7d6886e92e0320e5a3f42.exe
    "C:\Users\Admin\AppData\Local\Temp\aacc6a6512230da99d11da39e9f8b97fbfc294aea6b7d6886e92e0320e5a3f42.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2288
    • C:\Users\Admin\AppData\Local\Temp\aacc6a6512230da99d11da39e9f8b97fbfc294aea6b7d6886e92e0320e5a3f42.exe
      "C:\Users\Admin\AppData\Local\Temp\aacc6a6512230da99d11da39e9f8b97fbfc294aea6b7d6886e92e0320e5a3f42.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1720
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\e67db3c9-d5b6-4d50-b777-ddf19327ae33" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:2984
      • C:\Users\Admin\AppData\Local\Temp\aacc6a6512230da99d11da39e9f8b97fbfc294aea6b7d6886e92e0320e5a3f42.exe
        "C:\Users\Admin\AppData\Local\Temp\aacc6a6512230da99d11da39e9f8b97fbfc294aea6b7d6886e92e0320e5a3f42.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3040
        • C:\Users\Admin\AppData\Local\Temp\aacc6a6512230da99d11da39e9f8b97fbfc294aea6b7d6886e92e0320e5a3f42.exe
          "C:\Users\Admin\AppData\Local\Temp\aacc6a6512230da99d11da39e9f8b97fbfc294aea6b7d6886e92e0320e5a3f42.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:3532
          • C:\Users\Admin\AppData\Local\ff38cb8f-2d0e-4b0a-8aeb-aedc3c21507e\build2.exe
            "C:\Users\Admin\AppData\Local\ff38cb8f-2d0e-4b0a-8aeb-aedc3c21507e\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:4772
            • C:\Users\Admin\AppData\Local\ff38cb8f-2d0e-4b0a-8aeb-aedc3c21507e\build2.exe
              "C:\Users\Admin\AppData\Local\ff38cb8f-2d0e-4b0a-8aeb-aedc3c21507e\build2.exe"
              6⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:2476
              • C:\Windows\SysWOW64\cmd.exe
                "C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\ff38cb8f-2d0e-4b0a-8aeb-aedc3c21507e\build2.exe" & exit
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:4788
                • C:\Windows\SysWOW64\timeout.exe
                  timeout /t 6
                  8⤵
                  • Delays execution with timeout.exe
                  PID:2184
          • C:\Users\Admin\AppData\Local\ff38cb8f-2d0e-4b0a-8aeb-aedc3c21507e\build3.exe
            "C:\Users\Admin\AppData\Local\ff38cb8f-2d0e-4b0a-8aeb-aedc3c21507e\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:964
            • 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"
              6⤵
              • Creates scheduled task(s)
              PID:624
  • 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 WriteProcessMemory
    PID:1428
    • 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"
      2⤵
      • Creates scheduled task(s)
      PID:8

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        mozglue.dll

        • Path C:\ProgramData\mozglue.dll
        • Size 593KB
        • SHA256 ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
        • MD5 SHA1 SHA512 SSDEEP

        nss3.dll

        • Path C:\ProgramData\nss3.dll
        • Size 2.0MB
        • SHA256 ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
        • MD5 SHA1 SHA512 SSDEEP

        07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
        • Size 2KB
        • SHA256 f324be1b5a425aa263d3928d6551ba240ba5f83d043dfa2fc50fb609cea7dff3
        • MD5 SHA1 SHA512

        B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
        • Size 1KB
        • SHA256 55293d84425427d94b960127a9ca1c89dbbf9b4836f3f460d4034172760da440
        • MD5 SHA1 SHA512

        07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
        • Size 488B
        • SHA256 e917c1369c77ae779f94cdab55a34eb5cf5ce6ef9450fef44cca96ed28855095
        • MD5 SHA1 SHA512

        B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
        • Size 482B
        • SHA256 b4022bb8ecd27b76f6885d970276384da83ecfbe14e878065b858ef79ec294e5
        • MD5 SHA1 SHA512

        aacc6a6512230da99d11da39e9f8b97fbfc294aea6b7d6886e92e0320e5a3f42.exe

        • Path C:\Users\Admin\AppData\Local\e67db3c9-d5b6-4d50-b777-ddf19327ae33\aacc6a6512230da99d11da39e9f8b97fbfc294aea6b7d6886e92e0320e5a3f42.exe
        • Size 784KB
        • SHA256 aacc6a6512230da99d11da39e9f8b97fbfc294aea6b7d6886e92e0320e5a3f42
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\ff38cb8f-2d0e-4b0a-8aeb-aedc3c21507e\build2.exe
        • Size 449KB
        • SHA256 bd5aff6936d77e3deae4e45195b44ec5d4e7ba4f2a9dfe68ee7d6f7be2cfd97a
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\ff38cb8f-2d0e-4b0a-8aeb-aedc3c21507e\build2.exe
        • Size 449KB
        • SHA256 bd5aff6936d77e3deae4e45195b44ec5d4e7ba4f2a9dfe68ee7d6f7be2cfd97a
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\ff38cb8f-2d0e-4b0a-8aeb-aedc3c21507e\build2.exe
        • Size 449KB
        • SHA256 bd5aff6936d77e3deae4e45195b44ec5d4e7ba4f2a9dfe68ee7d6f7be2cfd97a
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\ff38cb8f-2d0e-4b0a-8aeb-aedc3c21507e\build2.exe
        • Size 449KB
        • SHA256 bd5aff6936d77e3deae4e45195b44ec5d4e7ba4f2a9dfe68ee7d6f7be2cfd97a
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path C:\Users\Admin\AppData\Local\ff38cb8f-2d0e-4b0a-8aeb-aedc3c21507e\build3.exe
        • Size 9KB
        • SHA256 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path C:\Users\Admin\AppData\Local\ff38cb8f-2d0e-4b0a-8aeb-aedc3c21507e\build3.exe
        • Size 9KB
        • SHA256 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path C:\Users\Admin\AppData\Local\ff38cb8f-2d0e-4b0a-8aeb-aedc3c21507e\build3.exe
        • Size 9KB
        • SHA256 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 9KB
        • SHA256 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
        • MD5 SHA1 SHA512 SSDEEP

        mstsca.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
        • Size 9KB
        • SHA256 8d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
        • MD5 SHA1 SHA512 SSDEEP

        memory/1720-136-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1720-137-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1720-148-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1720-139-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1720-138-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2288-135-0x0000000004220000-0x000000000433B000-memory.dmp

        memory/2288-134-0x00000000040B0000-0x000000000414F000-memory.dmp

        memory/2476-197-0x0000000000400000-0x000000000048B000-memory.dmp

        memory/2476-251-0x0000000000400000-0x000000000048B000-memory.dmp

        memory/2476-252-0x0000000000400000-0x000000000048B000-memory.dmp

        memory/2476-250-0x0000000000400000-0x000000000048B000-memory.dmp

        memory/2476-208-0x0000000061E00000-0x0000000061EF3000-memory.dmp

        memory/2476-198-0x0000000000400000-0x000000000048B000-memory.dmp

        memory/2476-196-0x0000000000400000-0x000000000048B000-memory.dmp

        memory/2476-194-0x0000000000400000-0x000000000048B000-memory.dmp

        memory/3040-151-0x0000000003FB0000-0x0000000004044000-memory.dmp

        memory/3532-187-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3532-160-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3532-165-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3532-155-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3532-154-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3532-168-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3532-167-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3532-254-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3532-153-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/3532-161-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4772-192-0x0000000002520000-0x0000000002620000-memory.dmp

        memory/4772-193-0x0000000003FC0000-0x0000000004037000-memory.dmp