BlackZluk 勒索软件

保护您的设备免受勒索软件等恶意软件威胁的重要性怎么强调都不为过。勒索软件攻击变得越来越复杂，对个人、企业甚至关键基础设施构成了重大风险。网络安全研究人员最近发现的一种复杂的勒索软件威胁是 BlackZluk 勒索软件。这种恶意软件可以造成广泛的破坏，从加密有价值的数据到威胁泄露敏感信息。保护您的设备并实施最佳实践对于避免成为此类攻击的受害者至关重要。

BlackZluk 勒索软件：一种新的有害威胁

BlackZluk 勒索软件是网络犯罪界最近发现的一款勒索软件，其目的是针对受感染的系统并加密重要文件。一旦勒索软件侵入系统，它就会插入带有“.blackZluk”扩展名的加密文件的文件名，使没有解密密钥就无法访问这些文件。例如，原本名为 1.png 的文件将变成 1.png.blackZluk，而 2.pdf 将变成 2.pdf.blackZluk。

除了加密过程之外，BlackZluk 还会发送一封名为“#RECOVERY#.txt”的勒索信。这封信会提醒受害者，他们的公司网络已被入侵，数据和敏感信息均已被泄露。攻击者通常会威胁称，如果赎金要求得不到满足，他们就会公开发布所收集的数据，这为攻击增加了一层勒索的意味。

BlackZluk 的策略：从加密到勒索

除了加密文件外，BlackZluk 的赎金通知还明确警告受害者不要寻求反恶意软件的帮助、尝试手动解密或联系第三方。如果受害者拒绝遵从攻击者的要求，则将面临永久性数据丢失的威胁。但是，支付要求的赎金并不能保证文件恢复，因为无法保证攻击者会提供必要的解密密钥。

受害者需要注意的是，与这些犯罪分子交往不仅会为进一步的非法活动提供资金，还会使他们容易受到更多攻击。网络安全专家一直建议不要支付赎金，而是强调从受感染的系统中删除勒索软件的重要性。

BlackZluk 如何传播：常见的攻击媒介

与许多勒索软件变体一样，BlackZluk 主要通过网络钓鱼攻击和社会工程技术进行传播。网络犯罪分子诱骗受害者下载恶意文件或点击伪装成合法内容的有害链接。此类恶意软件文件的最常见格式包括：

• 压缩文件（例如 RAR、ZIP）
• 可执行文件（.exe、.run）

欺诈性文件可通过钓鱼电子邮件、欺骗性广告或虚假软件更新传播。一旦受害者打开或与这些文件交互，恶意软件就会激活并开始加密过程。

后门木马和加载器型恶意软件是攻击者用来渗透网络的其他常用方法，允许他们远程安装勒索软件。此外，BlackZluk 可能通过本地网络或 USB 驱动器等可移动设备传播，一次攻击即可感染多个系统。

防御勒索软件的最佳安全实践

保护您的设备和网络免受 BlackZluk 等勒索软件攻击需要采取主动措施并持续保持警惕。以下是一些需要实施的关键安全措施：

使用强密码：确保您和您的组织对所有帐户使用复杂且唯一的密码

定期备份：在外部设备或安全的云存储上定期备份数据。如果受到攻击，备份可以让您恢复数据而无需支付赎金。确保这些备份离线存储，并且无法从主系统访问。

启用强大的反恶意软件工具：安装并及时更新信誉良好的反恶意软件解决方案。现代安全软件可以在勒索软件执行之前检测到它并防止其造成损害。

使用多重身份验证 (MFA) ：通过实施 MFA 来增强您的帐户，MFA 需要除密码之外的第二种身份验证形式。即使凭证被泄露，MFA 也会增加一层关键的安全保障。

教育和培训员工：定期对员工进行网络安全培训。培训他们识别网络钓鱼企图、避免可疑链接并养成安全的浏览习惯。人为错误往往是安全中最薄弱的环节。

保持软件和系统更新：确保您的应用程序和操作系统始终使用最新补丁进行更新。许多勒索软件攻击利用了过时软件中已知的漏洞。

电子邮件和网页过滤：实施电子邮件过滤工具来拦截钓鱼电子邮件和恶意附件。此外，使用网页过滤解决方案来阻止访问已知传播恶意软件的有害网站。

分割网络：通过分割网络，您可以将关键系统与网络的其余部分隔离。这降低了勒索软件在整个基础设施中传播的风险。

禁用 Office 文档中的宏：网络犯罪分子经常使用嵌入在 Office 文档中的宏来传播勒索软件。默认禁用宏可阻止这些欺诈脚本运行。

使用强密码：确保您和您的组织对所有帐户使用复杂且唯一的密码。考虑使用密码管理器生成和安全地存储密码的优势。

事件响应计划：制定并定期更新事件响应计划。这将确保您能够快速有效地应对勒索软件攻击，最大限度地减少停机时间和数据丢失。

最后的想法

勒索软件（如 BlackZluk）的威胁不断演变，攻击者不断改进攻击方法，甚至能攻破最安全的系统。因此，保持警惕并积极主动地防御这些威胁至关重要。通过遵守上述最佳安全实践，您可以显著降低遭受勒索软件攻击的可能性，并保护您的关键数据免受侵害。

BlackZluk 威胁生成的赎金记录如下：

'Hello my dear friend (Do not scan the files with antivirus in any case. In case of data loss, the consequences are yours)
Your data is encrypted

Unfortunately for you, a major IT security weakness left you open to attack, your files have been encrypted
The only method of recovering files is to purchase decrypt tool and unique key for you.
Download the (Session) messenger (hxxps://getsession.org) in messenger: 0569a7c0949434c9c4464cf2423f66d046e3e08654e4164404b1dc23783096d313 You have to add this Id and we will complete our converstion
In case of no answer in 24 hours write us to this backup e-mail: blackpro.team24@onionmail.org
Our online operator is available in the messenger Telegram: @Files_decrypt or hxxps://t.me/Files_decrypt
Check your e-mail Spam or Junk folder if you don't get answer more than 6 hours.
Contact us soon, because those who don't have their data leaked in our press release blog and the price they'll have to pay will go up significantly.

Attention

Do not rename encrypted files.
Do not try to decrypt your data using third party software - it may cause permanent data loss.
We are always ready to cooperate and find the best way to solve your problem.
The faster you write - the more favorable conditions will be for you.
Our company values its reputation. We give all guarantees of your files decryption.

What are your recommendations?

Never change the name of the files, if you want to manipulate the files, be sure to back them up. If there are any problems with the files, we are not responsible for them.

Never work with intermediary companies because they charge you more money.Don't be afraid of us, just email us.

Sensitive data on your system was DOWNLOADED.
If you DON'T WANT your sensitive data to be PUBLISHED you have to act quickly.

Data includes:

Employees personal data, CVs, DL, SSN.

Complete network map including credentials for local and remote services.

Private financial information including: clients data, bills, budgets, annual reports, bank statements.

Manufacturing documents including: datagrams, schemas, drawings in solidworks format

And more…
What are the dangers of leaking your company's data.
First of all, you will receive fines from the government such as the GDRP and many others, you can be sued by customers of your firm for leaking information that was confidential. Your leaked data will be used by all the hackers on the planet for various unpleasant things. For example, social engineering, your employees' personal data can be used to re-infiltrate your company. Bank details and passports can be used to create bank accounts and online wallets through which criminal money will be laundered. On another vacation trip, you will have to explain to the FBI where you got millions of dollars worth of stolen cryptocurrency transferred through your accounts on cryptocurrency exchanges. Your personal information could be used to make loans or buy appliances. You would later have to prove in court that it wasn't you who took out the loan and pay off someone else's loan. Your competitors may use the stolen information to steal technology or to improve their processes, your working methods, suppliers, investors, sponsors, employees, it will all be in the public domain. You won't be happy if your competitors lure your employees to other firms offering better wages, will you? Your competitors will use your information against you. For example, look for tax violations in the financial documents or any other violations, so you have to close your firm. According to statistics, two thirds of small and medium-sized companies close within half a year after a data breach. You will have to find and fix the vulnerabilities in your network, work with the customers affected by data leaks. All of these are very costly procedures that can exceed the cost of a ransomware buyout by a factor of hundreds. It's much easier, cheaper and faster to pay us the ransom. Well and most importantly, you will suffer a reputational loss, you have been building your company for many years, and now your reputation will be destroyed. Do not go to the police or FBI for help and do not tell anyone that we attacked you.
They won't help and will only make your situation worse. In 7 years not a single member of our group has been caught by the police, we are top-notch hackers and never leave a trace of crime. The police will try to stop you from paying the ransom in any way they can. The first thing they will tell you is that there is no guarantee to decrypt your files and delete the stolen files, this is not true, we can do a test decryption before payment and your data will be guaranteed to be deleted because it is a matter of our reputation, we make hundreds of millions of dollars and we are not going to lose income because of your files. It is very beneficial for the police and the FBI to let everyone on the planet know about the leak of your data, because then your state will receive fines under GDPR and other similar laws. The fines will go to fund the police and FBI. The police and FBI will not be able to stop lawsuits from your customers for leaking personal and private information. The police and FBI will not protect you from repeat attacks. Paying us a ransom is much cheaper and more profitable than paying fines and legal fees.

If you do not pay the ransom, we will attack your company again in the future.
Start messaging with your unique ID an incident file #RECOVERY#.txt
your unique ID'

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