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Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-clock.svg) 4 min read Related Products [![Advanced WildFire icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/strata_RGB_logo_Icon_Color.png)Advanced WildFire](https://unit42.paloaltonetworks.com/product-category/advanced-wildfire/ "Advanced WildFire") * ![Profile Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-profile-grey.svg) By: * [Ryan Olson](https://unit42.paloaltonetworks.com/author/ryan-olson/) * ![Published Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-calendar-grey.svg) Published:October 22, 2014 * ![Tags Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-category.svg) Categories: * [Ransomware](https://unit42.paloaltonetworks.com/category/ransomware/) * [Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) * ![Tags Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-tags-grey.svg) Tags: * [Bitcoin](https://unit42.paloaltonetworks.com/tag/bitcoin/) * [CryptoWall](https://unit42.paloaltonetworks.com/tag/cryptowall/) * [CryptoWall 2.0](https://unit42.paloaltonetworks.com/tag/cryptowall-2-0/) * [Tor](https://unit42.paloaltonetworks.com/tag/tor/) * [![Download Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-download.svg)](https://unit42.paloaltonetworks.com/tracking-new-ransomware-cryptowall-2-0/?pdf=download&lg=en&_wpnonce=f6e4b1f2e6 "Click here to download") * [![Print Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-print.svg)](https://unit42.paloaltonetworks.com/tracking-new-ransomware-cryptowall-2-0/?pdf=print&lg=en&_wpnonce=f6e4b1f2e6 "Click here to print") Share![Down arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/down-arrow.svg) * ![Link Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-share-link.svg) * [![Link Email](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-sms.svg)](mailto:?subject=Tracking%20New%20Ransomware%20CryptoWall%202.0&body=Check%20out%20this%20article%20https%3A%2F%2Funit42.paloaltonetworks.com%2Ftracking-new-ransomware-cryptowall-2-0%2F "Share in email") * [![Facebook Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-fb-share.svg)](https://www.facebook.com/sharer/sharer.php?u=https%3A%2F%2Funit42.paloaltonetworks.com%2Ftracking-new-ransomware-cryptowall-2-0%2F "Share in Facebook") * [![LinkedIn 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Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-mastodon-share.svg)](https://mastodon.social/share?text=Tracking%20New%20Ransomware%20CryptoWall%202.0%20https%3A%2F%2Funit42.paloaltonetworks.com%2Ftracking-new-ransomware-cryptowall-2-0%2F "Share in Mastodon") The latest development in the ransomware world is CryptoWall 2.0, a new version of this malware family that uses the Tor network for command and control. [F-Secure](https://www.f-secure.com/weblog/archives/00002750.html) was the first to spot this new version on October 1, but since then the attacks have ramped up and new variants of the malware are emerging daily. Our WildFire analysis platform has picked up 84 CryptoWall 2.0 variants since September 30, delivered primarily through e-mail attachments but also through malicious PDFs and web exploit kits. CryptoWall 2.0 is similar to other ransomware attacks that have plagued users and businesses for nearly a decade. Once it is running on a system, CryptoWall 2.0 seeks out document files and encrypts them using the RSA encryption algorithm. The attacker holds the key necessary to decrypt the files unless the victim agrees to pay a $500 ransom. Unlike previous versions of CryptoWall, 2.0 communicates with its command and control (C2) server through the Tor anonymization network. This allows attackers to hide their communications and avoid having their C2 servers shut down, but also makes it easy for organizations to block the threat. CryptoWall isn't the only threat that communicates over Tor and if your network doesn't have an explicit reason to allow anonymization networks, you should consider blocking the application altogether with your firewall. If your system has already been infected with CryptoWall 2.0, you'll see a pop-up just like this one shortly after the malware has encrypted your documents. ![image001](http://blog.paloaltonetworks.com/wp-content/uploads/2014/10/image001-500x461.png) Note that the attacker has given you a few options for how to pay them the ransom. The green box contains four links that will work only for your system. These use four domains registered just today: * torpaycash.com * torpaycnf.com * torpayeur.com * torpayusd.com All of the domains currently resolve to 151.248.115.146, a Russian IP address and have WhoIs records associated with the e-mail address "ladomfichisi1987@mail.ru". This is the same address used to register two other payment domains registered earlier this month: * tor2pay.com * tor4pay.com If these domains are confiscated or otherwise shut down, CryptoWall instructs the user to download the Tor Browser and access a website (paytordmbdekmizq.onion) that is only accessible over the Tor network. Unlikely some of it's more flexible competition, CryptoWall only accepts ransom in the form of BitCoin. To pay the ransom the user will need to acquire 1.33 BitCoins and transfer them to a specific BitCoin wallet that is associated with their specific infection. ![image003](http://blog.paloaltonetworks.com/wp-content/uploads/2014/10/image003-500x462.png) History has shown that paying the ransom will likely allow you to retrieve your files, but the best defense against ransomware is having up-to-date back-ups or by preventing the infection all-together. ### Infection Vectors Since we detected the first CryptoWall 2.0 variant with our WildFire engine on September 29, we've seen over 85,000 separate attacks attempting to deliver the malware. The majority of these have come through e-mails with executable attachments, sometimes contained in .zip files. Most of the e-mail attacks used fake invoice, fax and voicemail themes with attachments named like the following: * Complaint\_IRS-Id-12839182.scr * fax00415741732781728.scr * VOICE387-778-3454.zip * CH\_Import\_Information.exe In the last week we've seen the attack vectors evolve to contain exploit kits as well. On October 19, the Kafeine posted a [blog](https://malware.dontneedcoffee.com/2014/10/cve-2014-0556-adobe-flash-player.html) discussing the inclusion of CVE-2014-0556 in the Nuclear Pack exploit kit, which was installing CryptoWall 2.0. Yesterday we picked up an e-mail campaign pretending to be a fax report that carried a .zip attachment with a PDF inside. The [PDF](https://www.virustotal.com/en/file/dd8c76800dc57fea9a8ef0ee79e11c532505fb9ce2c6f561f78589145250888e/analysis/) exploits CVE-2013-2729 to download a binary which also installed CryptoWall 2.0. ![image005](https://unit42.paloaltonetworks.com/wp-content/uploads/2014/10/image005.png) ### Protecting Yourself The best way to protect yourself against ransomware is to keep up-to-date backups of your important files. A ransomware infection, which encrypts all of your files, is similar to a drive failure, except that for a small fee you have the chance to get your files back. To protect against CryptoWall 2.0 we recommend taking the following actions: * [Block downloads of executable files](https://www.paloaltonetworks.com/documentation/60/pan-os/pan-os/section_9/chapter_6.html) from the web without specific user consent. * Add a 'continue' page for all file downloads that can provide a reminder to users before they automatically install potentially impacting software. * Employ an advanced detection system (like [WildFire](https://www.paloaltonetworks.com/products/technologies/wildfire.html)) to analyze all incoming executables, PDF files, and Microsoft Office Documents. * Consider blocking the Tor application completely within your network unless it's absolutely necessary. * Ensure that only necessary users have write-access to network shares. CryptoWall will encrypt files in network shares if the share is mounted at the time of infection and accessible to the logged-in user. * Disconnect or unmounts back-up drives when they aren't being used, as CryptoWall can also encrypt your backups. * Consider deploying an end-point protection system (like [Traps](https://media.paloaltonetworks.com/lp/traps/)) that prevents exploitation of known and unknown vulnerabilities. * Deploy IPS signatures to detect CVE-2014-0556 and CVE-2013-2729 exploitation. For Palo Alto Networks IPS users these include: |--------|------------------------------------------------------------------|---------------| | Sig ID | Name | CVE ID | | 35811 | Adobe Reader Embedded BMP Parsing Integer Overflow Vulnerability | CVE-2013-2729 | | 36762 | Adobe Flash Player Memory Corruption Vulnerability | CVE-2014-0556 | | 36763 | Adobe Flash Player Memory Corruption Vulnerability | CVE-2014-0556 | | 36764 | Adobe Flash Player Memory Corruption Vulnerability | CVE-2014-0556 | | 36754 | Adobe Flash Player Memory Corruption Vulnerability | CVE-2014-0556 | Back to top ### Tags * [Bitcoin](https://unit42.paloaltonetworks.com/tag/bitcoin/ "Bitcoin") * [CryptoWall](https://unit42.paloaltonetworks.com/tag/cryptowall/ "CryptoWall") * [CryptoWall 2.0](https://unit42.paloaltonetworks.com/tag/cryptowall-2-0/ "CryptoWall 2.0") * [Tor](https://unit42.paloaltonetworks.com/tag/tor/ "Tor") [Threat Research Center](https://unit42.paloaltonetworks.com "Threat Research") [Next: POODLE like it's 1999](https://unit42.paloaltonetworks.com/poodle-like-1999/ "POODLE like it’s 1999") ### Related Articles * [The State of AI-Enabled Malware August 2026: From Brand Abuse to Agentic Execution](https://unit42.paloaltonetworks.com/ai-enabled-malware-analysis/ "article - table of contents") * [01flip: Multi-Platform Ransomware Written in Rust](https://unit42.paloaltonetworks.com/new-ransomware-01flip-written-in-rust/ "article - table of contents") * [Leaked Environment Variables Allow Large-Scale Extortion Operation in Cloud Environments](https://unit42.paloaltonetworks.com/large-scale-cloud-extortion-operation/ "article - table of contents") ## Related Ransomware Resources ![Pictorial representation of Iran cyber attacks. Close-up of a person wearing glasses, with computer code reflected in the lenses.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/03/12_Security-Technology_Category_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/top-threats.svg)High Profile Threats](https://unit42.paloaltonetworks.com/category/top-cyberthreats/) April 17, 2026 [#### Threat Brief: Escalation of Cyber Risk Related to Iran (Updated April 17)](https://unit42.paloaltonetworks.com/iranian-cyberattacks-2026/) * [APK](https://unit42.paloaltonetworks.com/tag/apk/ "APK") * [DDoS attacks](https://unit42.paloaltonetworks.com/tag/ddos-attacks/ "DDoS attacks") * [GenAI](https://unit42.paloaltonetworks.com/tag/genai/ "GenAI") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/iranian-cyberattacks-2026/ "Threat Brief: Escalation of Cyber Risk Related to Iran (Updated April 17)") ![Pictorial representation of RaaS RansomHouse. Digital representation of cybersecurity concept with a padlock superimposed over computer circuit boards, symbolizing data protection and encryption technologies.](https://unit42.paloaltonetworks.com/wp-content/uploads/2025/12/06_Ransomware_Category_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-threat-research.svg)Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) December 17, 2025 [#### From Linear to Complex: An Upgrade in RansomHouse Encryption](https://unit42.paloaltonetworks.com/ransomhouse-encryption-upgrade/) * [ESXi](https://unit42.paloaltonetworks.com/tag/esxi/ "ESXi") * [Jolly Scorpius](https://unit42.paloaltonetworks.com/tag/jolly-scorpius/ "Jolly Scorpius") * [RansomHouse](https://unit42.paloaltonetworks.com/tag/ransomhouse/ "RansomHouse") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/ransomhouse-encryption-upgrade/ "From Linear to Complex: An Upgrade in RansomHouse Encryption") ![Pictorial representation of 01flip ransomware written in Rust. Digital artwork of a pixelated U.S. dollar bill disintegrating into small blocks against a blue data matrix background.](https://unit42.paloaltonetworks.com/wp-content/uploads/2025/12/05_Ransomware_Category_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-threat-research.svg)Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) December 10, 2025 [#### 01flip: Multi-Platform Ransomware Written in Rust](https://unit42.paloaltonetworks.com/new-ransomware-01flip-written-in-rust/) * [Bitcoin](https://unit42.paloaltonetworks.com/tag/bitcoin/ "Bitcoin") * [CL-CRI-103](https://unit42.paloaltonetworks.com/tag/cl-cri-103/ "CL-CRI-103") * [Cryptocurrency](https://unit42.paloaltonetworks.com/tag/cryptocurrency/ "Cryptocurrency") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/new-ransomware-01flip-written-in-rust/ "01flip: Multi-Platform Ransomware Written in Rust") ![Pictorial representation of malicious LLMs. Close-up view of a digital wall displaying various glowing icons, representing a high-tech network interface.](https://unit42.paloaltonetworks.com/wp-content/uploads/2025/11/AdobeStock_1270203474-786x440.jpeg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-threat-research.svg)Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) November 25, 2025 [#### The Dual-Use Dilemma of AI: Malicious LLMs](https://unit42.paloaltonetworks.com/dilemma-of-ai-malicious-llms/) * [Credential Harvesting](https://unit42.paloaltonetworks.com/tag/credential-harvesting/ "Credential Harvesting") * [Data exfiltration](https://unit42.paloaltonetworks.com/tag/data-exfiltration/ "data exfiltration") * [LLM](https://unit42.paloaltonetworks.com/tag/llm/ "LLM") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/dilemma-of-ai-malicious-llms/ "The Dual-Use Dilemma of AI: Malicious LLMs") ![Constellation image representing the constellation schema used by Palo Alto Networks Unit 42 to track nation-state and cybercrime threat actor groups](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/Generic-B-1920x900-1-786x368.png) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/threat-actor-groups.svg)Threat Actor Groups](https://unit42.paloaltonetworks.com/category/threat-actor-groups/) August 1, 2025 [#### Threat Actor Groups Tracked by Palo Alto Networks Unit 42 (Updated Aug. 1, 2025)](https://unit42.paloaltonetworks.com/threat-actor-groups-tracked-by-palo-alto-networks-unit-42/) * [Academic Serpens](https://unit42.paloaltonetworks.com/tag/academic-serpens/ "Academic Serpens") * [Agent Serpens](https://unit42.paloaltonetworks.com/tag/agent-serpens/ "Agent Serpens") * [Agonizing Serpens](https://unit42.paloaltonetworks.com/tag/agonizing-serpens/ "Agonizing Serpens") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/threat-actor-groups-tracked-by-palo-alto-networks-unit-42/ "Threat Actor Groups Tracked by Palo Alto Networks Unit 42 (Updated Aug. 1, 2025)") ![Pictorial representation of Unit 42 threat attribution system. Illustration featuring a white triangle centered within an abstract cosmic background of purple and blue swirls and stars.](https://unit42.paloaltonetworks.com/wp-content/uploads/2025/07/Generic-A-1920x900-1-786x368.png) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/threat-actor-groups.svg)Threat Actor Groups](https://unit42.paloaltonetworks.com/category/threat-actor-groups/) July 31, 2025 [#### Introducing Unit 42's Attribution Framework](https://unit42.paloaltonetworks.com/unit-42-attribution-framework/) * [Advanced Persistent Threat](https://unit42.paloaltonetworks.com/tag/advanced-persistent-threat/ "Advanced Persistent Threat") * [Bookworm](https://unit42.paloaltonetworks.com/tag/bookworm/ "Bookworm") * [Nomenclature](https://unit42.paloaltonetworks.com/tag/nomenclature/ "nomenclature") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/unit-42-attribution-framework/ "Introducing Unit 42’s Attribution Framework") ![Pictorial representation of the ransomware landscape. Digital artwork of a disintegrating U.S. dollar bill with pixelated effects on a cyber-inspired background.](https://unit42.paloaltonetworks.com/wp-content/uploads/2025/04/05_Ransomware_Category_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-report-white-1.svg)Trend Reports](https://unit42.paloaltonetworks.com/category/trend-reports/) April 23, 2025 [#### Extortion and Ransomware Trends January-March 2025](https://unit42.paloaltonetworks.com/2025-ransomware-extortion-trends/) * [BianLian](https://unit42.paloaltonetworks.com/tag/bianlian/ "BianLian") * [Akira ransomware](https://unit42.paloaltonetworks.com/tag/akira-ransomware/ "Akira ransomware") * [Muddled Libra](https://unit42.paloaltonetworks.com/tag/muddled-libra/ "Muddled Libra") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/2025-ransomware-extortion-trends/ "Extortion and Ransomware Trends January-March 2025") ![A pictorial representation of Akira ransomware, distributed by Howling Scorpius. A person's hand typing on a keyboard with a digital screen displaying the word "password" highlighted in blue, set against a backdrop of various cybersecurity interface graphics.](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/11/09_Cybercrime_Category_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/top-threats.svg)High Profile Threats](https://unit42.paloaltonetworks.com/category/top-cyberthreats/) December 2, 2024 [#### Threat Assessment: Howling Scorpius (Akira Ransomware)](https://unit42.paloaltonetworks.com/threat-assessment-howling-scorpius-akira-ransomware/) * [Howling Scorpius](https://unit42.paloaltonetworks.com/tag/howling-scorpius/ "Howling Scorpius") * [Leak site](https://unit42.paloaltonetworks.com/tag/leak-site/ "Leak site") * [Torrenting](https://unit42.paloaltonetworks.com/tag/torrenting/ "torrenting") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/threat-assessment-howling-scorpius-akira-ransomware/ "Threat Assessment: Howling Scorpius (Akira Ransomware)") ![Pictorial representation of a threat like BlackSuit ransomware. An illustration of a modern workspace with a laptop displaying cybersecurity icons, surrounded by stacks of coins and a credit card, all depicted in a neon, digital art style.](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/11/04_Ransomware_Category_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/top-threats.svg)High Profile Threats](https://unit42.paloaltonetworks.com/category/top-cyberthreats/) November 20, 2024 [#### Threat Assessment: Ignoble Scorpius, Distributors of BlackSuit Ransomware](https://unit42.paloaltonetworks.com/threat-assessment-blacksuit-ransomware-ignoble-scorpius/) * [BlackSuit ransomware](https://unit42.paloaltonetworks.com/tag/blacksuit-ransomware/ "BlackSuit ransomware") * [Construction](https://unit42.paloaltonetworks.com/tag/construction/ "construction") * [Education](https://unit42.paloaltonetworks.com/tag/education/ "Education") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/threat-assessment-blacksuit-ransomware-ignoble-scorpius/ "Threat Assessment: Ignoble Scorpius, Distributors of BlackSuit Ransomware") ![A representation of a threat group like Jumpy Pisces. Illustrative image featuring two fish and the Pisces constellation superimposed on a stylized, abstract background with flowing purple waves and a starry night sky.](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/10/Pisces-NK-A-1920x900-1-786x368.png) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/threat-actor-groups.svg)Threat Actor Groups](https://unit42.paloaltonetworks.com/category/threat-actor-groups/) October 30, 2024 [#### Jumpy Pisces Engages in Play Ransomware](https://unit42.paloaltonetworks.com/north-korean-threat-group-play-ransomware/) * [North Korea](https://unit42.paloaltonetworks.com/tag/north-korea/ "North Korea") * [Jumpy Pisces](https://unit42.paloaltonetworks.com/tag/jumpy-pisces/ "Jumpy Pisces") * [Fiddling Scorpius](https://unit42.paloaltonetworks.com/tag/fiddling-scorpius/ "Fiddling Scorpius") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/north-korean-threat-group-play-ransomware/ "Jumpy Pisces Engages in Play Ransomware") * ![Slider arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/slider-arrow-left.svg) * ![Slider arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/slider-arrow-left.svg) ![Close button](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/close-modal.svg) ![Enlarged Image]() ![Newsletter](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/03/unit42-footer-subscribe-desktop.png) ![UNIT 42 Small Logo](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/palo-alto-logo-small.svg) Get updates from Unit 42 ## Peace of mind comes from staying ahead of threats. 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