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A Nice Little Cryptography Primer

By itss | 28/06/2021
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Pun Intended.

Category: Technology
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  • New PamStealer macOS Malware Uses Clever Tradecraft To Remain Stealthy
    by BeauHD on 03/07/2026 at 3:00 pm

    An anonymous reader quotes a report from Ars Technica: Researchers have found a never-before-seen piece of macOS malware that combines a series of clever tradecraft to infect Macs with stealthy, custom-developed credential-stealing code. The malware is delivered in two stages. The first is distributed in a disk image that masquerades as Maccy, a clipboard manager for Macs. It's compiled as AppleScript that is notable for the way it delivers the second stage. The malware is named PamStealer because the Rust-written infostealer uses the Pluggable Authentication Modules interface built into macOS to validate the target's login password before sending it to an attacker-controlled server. [...] PamStealer shows a native password prompt designed to resemble a system authorization request. Text that appears with the prompt says: "Maccy wants to make changes. Enter your password to allow this." As noted earlier, once a target complies, the malware validates it locally through the PAM API. "This check is done entirely through PAM: there is no call out to dscl, security, osascript or any spawned process to verify the password, as many commodity macOS stealers do," [said Jamf, a security firm for macOS users]. "The result is a quieter routine that keeps only a verified password, and one fewer process chain for defenders to detect on." If the validation fails, PamStealer displays the prompts again until it receives the correct one. Once the target enters the correct password, PamStealer displays a message stating that the file is damaged and can't be installed. This is designed to be a decoy to prevent the target from suspecting anything is amiss. The malware uses tactics to maximize the information it can steal. One tactic is to request the target grant full disk access to the fake Maccy app. It also contains code designed to access ethereum accounts. The various techniques -- particularly the Script Editor lure, a self-contained JXA dropper, a Rust-based second stage, and local validation of credentials through PAM are all noteworthy. Read more of this story at Slashdot.

  • US Life Expectancy On Track To Reach Record High
    by BeauHD on 03/07/2026 at 10:00 am

    The US age-adjusted death rate fell to a record low in 2025, likely pushing life expectancy to a record high as overdose deaths declined and mortality improved across all age groups. CNN reports: There were about 689 deaths for every 100,000 people in the US in 2025, according to a new report from the US Centers for Disease Control and Prevention -- the lowest rate recorded in more than a century of tracking. The age-adjusted rate has fallen 22% since 2021, landing about 4% lower than it was just before the pandemic in 2019. [...] The top causes of death in the US in 2025 followed longstanding patterns: Heart disease led with nearly 695,000 deaths, followed by cancer with nearly 623,000 deaths. Unintentional injuries, which includes drug overdoses, were the third leading cause of death. Overdose deaths are still high -- about 70,000 people died from an overdose in 2025, preliminary CDC data shows -- but experts say that sharp declines probably played a large role in bringing the age-adjusted death rate down in the US. Read more of this story at Slashdot.

  • Amazon Has Enough Satellites To Launch Its Starlink Competitor
    by BeauHD on 03/07/2026 at 6:00 am

    Amazon says its Leo satellite network now has enough spacecraft in orbit to begin limited commercial internet service, with 396 satellites providing "continuous service across initial latitudes." Early performance will likely be uneven, however, and well behind Starlink. "It'll be years before Amazon can boast similar performance numbers as it continues to launch a planned 3,232 Leo satellites," reports The Verge. From the report: SpaceX went live with its "Better than nothing beta" back in 2020 when it had almost 900 satellites operating in low-Earth orbit. It initially served a narrow band of users in the upper US and Canada, who complained about frequent service interruptions and high sensitivity to obstructions, with speeds between 50Mbps and 150Mbps, and latency from 20ms to 40ms. By 2022, the service and coverage areas had already dramatically improved. [...] SpaceX currently has over 10,000 Starlink satellites in operation, providing robust internet connectivity on land, sea, and air in over 160 countries. Performance varies by the dish, service level paid for, time of day, and location of the user, but we're now talking 200Mbps median download speeds, 10Mbps to 40Mbps uploads, and latency hovering around 25ms. Read more of this story at Slashdot.

  • Sitting For More Than 30 Minutes At a Time Linked To Higher Risk of Cancer Death
    by BeauHD on 03/07/2026 at 2:00 am

    An anonymous reader quotes a report from The Guardian: Researchers who tracked more than 90,000 people over a decade found that sitting or lying down while awake for more than 30 minutes in one period each day was associated with an increased risk of cancer death. The risk increases for every additional hour of continuous inactivity, the findings suggest. However, the researchers also found breaking up periods of sedentary behavior longer than 30 minutes with bursts of physical activity could help reduce the risk. Getting up every half-hour, even for a short walk around the office, could do wonders for your health, they said. [...] The findings, published in Plos Medicine, focused on the health effects of prolonged sedentary behavior on a daily basis. [...] The team analyzed data from wearable devices worn by more than 91,000 UK Biobank participants, who were followed for an average of 12 years. The findings suggest prolonged inactivity lasting more than 30 minutes was associated with cancer risks. Each additional hour of prolonged inactivity every day was associated with a 10% increase in risk of cancer death. However, replacing long spells of inactivity with movement appeared to reduce that risk. Substituting one hour of sedentary behavior each day with light physical activity, such as ironing or washing up, was associated with a 12% lower risk of cancer death. Replacing 30 minutes of inactivity each day with 30 minutes of moderate physical activity, such as walking at an average pace, was associated with an 8% lower risk. The risk was 22% lower when five minutes of inactivity was replaced with five minutes of vigorous physical activity each day, the study suggested. There were limitations to the research, including the fact that the researchers performed a statistical analysis of an observational study, so could not prove causation. Read more of this story at Slashdot.

  • Labor Force Participation Rate Falls To Lowest In 50 years
    by BeauHD on 02/07/2026 at 9:05 pm

    The US unemployment rate fell to 4.2% in June largely because 720,000 people left the labor force, pushing participation to 61.5%. Excluding the Covid-era jobs market, that's the lowest participation rate since June 1976. CNBC reports: The decline in the labor force marks a "massive exodus" driven by multiple factors, said Mike Reid, head of U.S. economics at RBC. "The unemployment rate fell to 4.2% as both the number of unemployed workers and the size of the labor force pulled back," Reid wrote in a post-report commentary. "This may well be a story of retirements but could also be a story of prior job seekers dropping out of the labor force." [...] [T]he rolls of those counted as not in the labor force, a group that includes the unemployed and those not looking for work, jumped by 832,000. And while the establishment survey, which counts jobs filled, showed growth for the month of 57,000, the survey of households, which counts the actual level of those working, tumbled by 507,000. On a year-over-year basis, the labor force is down by just over 1 million, while the level of the employed also has fallen by 1.06 million and the ranks of the unemployed have risen by 40,000. The employment-to-population ratio slipped to 59% in June, the lowest since October 2021. All that has happened while the unemployment rate has risen by just one-tenth of a percentage point to 4.2%. The drop in participation is sometimes attributed to a shrinking immigrant population and retiring baby boomers and Gen Xers. However, in June the biggest plunge came from what is defined as "prime age" workers, or those between the ages of 25 and 54. That rate fell 0.6 percentage point to 83.3%, its lowest since December 2023. "Looking at the statistics now, that argument doesn't hold up so well," North said of the retirement and immigration rationale. "I hate to use the word 'alarming,'" he added, but said the numbers are cause for concern. Read more of this story at Slashdot.

  • AI Agent Executes 'First' End-To-End Ransomware Attack
    by BeauHD on 02/07/2026 at 8:00 pm

    Sysdig says it has documented the first ransomware attack carried out end to end by an AI agent, which autonomously exploited exposed systems, stole credentials, established persistence, compromised a production database, and destroyed data. The research team named the attacker "JadePuffer" and said it gained initial access to an internet-facing Langflow instance by exploiting CVE-2025-3248. "The most striking characteristic, however, was the LLM's behavior," Sysdig director of threat research Michael Clark said in a blog post. An anonymous reader quotes an excerpt from The Register: JadePuffer's "self-narrating" payloads "contained natural language reasoning, target prioritization, and the kind of detailed annotations that human operators don't often write but LLM-generated code produces reflexively," Clark added. "The operation also adapted in real time, retrying failed steps within refined parameters. In one sequence, it went from a failed login to a working fix in 31 seconds." After exploiting CVE-2025-3248, a missing authentication vulnerability in Langflow that allows remote, unauthenticated attackers to execute arbitrary Python on the host, the AI agent began scanning for and collecting secrets, including LLM provider API keys, cloud credentials "with explicit coverage of Chinese providers" including Alibaba, Aliyun, Tencent, and Huawei, while also scanning for AWS, Azure and Google Cloud Platform, cryptocurrency wallets, and database credentials. The AI also installed a crontab entry on the Langflow server to maintain persistence and call back to the attacker's infrastructure every 30 minutes. JadePuffer's intended target was a separate internet-exposed production server running a MySQL database and an Alibaba Nacos configuration service, we're told. Nacos is an open-source service-discovery and dynamic configuration platform developed by Alibaba and used in the cloud provider's microservices applications. The agent connected to the server's exposed MySQL port using root credentials, although Sysdig doesn't know how the attacker obtained them. These credentials weren't stolen from the victim's environment. JadePuffer then attacked Nacos via multiple vectors including an authorization bypass flaw (CVE-2021-29441) and forging a valid JSON web token (JWT) using Nacos's default signing key. Additionally, using its root database access, the LLM injected a backdoor administrator into the Nacos backing database. It ultimately encrypted all 1,342 Nacos service configuration items using MySQL's built-in AES encryption function, and created an extortion demand, ransom note, Bitcoin payment address, and a Proton Mail contact [...]. However, according to the threat hunters, the victim can't recover the encrypted data, even if they paid the ransom demand, because the agent escalated "from row-level deletion to dropping entire database schemas, narrating its own targeting rationale," without backing up any of the encrypted data. Read more of this story at Slashdot.

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