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The threat group PowerPool used a publicly disclosed zero-day local privilege escalation flaw in Microsoft Windows ALPC to gain elevated access on compromised systems. The vulnerability affected Windows 7 through Windows 10 and abused the SchRpcSetSecurity API to let restricted users or processes obtain administrator or SYSTEM privileges by overwriting protected files through hard links in C:\Windows\Task. PowerPool reportedly modified and recompiled a public proof-of-concept exploit, then used it to replace GoogleUpdate.exe with a second-stage payload that would later run with elevated privileges.
Initial access was achieved through targeted delivery methods including malicious email attachments and .slk files that launched PowerShell via Microsoft Excel. After escalation, the group deployed a two-stage Windows backdoor and relied on open-source post-exploitation and credential-dumping tools to move laterally inside victim environments. Microsoft later issued a security update through Windows Update to patch the flaw.
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3 events from the most recent confirmed update back to the earliest known activity.
A local privilege-escalation vulnerability in Microsoft Windows ALPC, affecting Windows 7 through Windows 10, was publicly disclosed on GitHub along with proof-of-concept exploit code. The flaw involved the SchRpcSetSecurity API and could let a restricted user overwrite protected files via hard links to gain elevated privileges.
Microsoft released a Windows Update patch to fix the ALPC local privilege-escalation vulnerability after it was exploited in the wild. The patch addressed the zero-day abused by the PowerPool campaign.
ESET observed malicious use of the publicly disclosed exploit within two days of disclosure and attributed the activity to a threat group it dubbed PowerPool. The group modified and recompiled the public exploit, then used it to replace GoogleUpdate.exe with second-stage malware to obtain elevated privileges on targeted systems.
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A public proof-of-concept exploit dubbed **MiniPlasma** has been released for a Windows local privilege escalation flaw that can grant attackers **SYSTEM** access on fully patched machines. The exploit targets `cldflt.sys`, the Windows Cloud Files Mini Filter Driver used by cloud sync features such as OneDrive, and specifically abuses the `HsmOsBlockPlaceholderAccess` routine. Researchers said the bug appears tied to **`CVE-2020-17103`**, a vulnerability originally reported by Google Project Zero's James Forshaw in 2020 and believed to have been fixed by Microsoft, but the original exploit path reportedly still works. The exploit abuses missing access checks and a race condition during token switching to create arbitrary registry keys in the `.DEFAULT` user hive and ultimately spawn a SYSTEM shell. Researcher Chaotic Eclipse, also referenced as Nightmare-Eclipse, published the code on GitHub, while Will Dormann reported that it works reliably on Windows 11 systems with the May 2026 updates, though not on the latest Insider Preview Canary builds. Because the affected driver is broadly deployed across Windows environments, the release of reliable public exploit code sharply raises near-term risk while organizations await clarification or a fix from Microsoft.
Jul 1, 2026
Check Point Research identified an exploit developer known as **PlayBit** (also tracked as `luxor2008`) as the likely author of multiple Windows local privilege escalation 1-day exploits, linking the actor to code for `CVE-2013-3660`, `CVE-2015-0057`, `CVE-2015-1701`, `CVE-2016-7255`, and `CVE-2018-8453`. The attribution was based on recurring coding patterns across samples, including hash-based API imports, detailed OS and patch-state checks, kernel pointer leaks through Desktop Heap metadata, and evolving `SMEP`/`NX` bypass methods. Researchers said the exploits were marketed commercially, with broad Windows-version support and pricing reportedly in the **$5,000 to $10,000** range. The same exploit lineage was later tied to real-world attacks by both crimeware and targeted operators. The referenced vulnerabilities were used by malware families including **Dyre, Ramnit, Locky, LockCrypt, Maze, REvil, and Sodin**, while `CVE-2018-8453` was also reported in targeted attacks. The reporting indicates that PlayBit’s tooling and exploit-development tradecraft became a shared enabler for post-compromise privilege escalation, helping ransomware and other malware operators turn initial access into full system control.
Aug 15, 2026
Blackpoint Cyber reported an intrusion at an industrial organization in which attackers deployed **PCHunter64.exe** from the unusual path `C:\PerfLogs`, alongside **AnyDesk**, **FileZilla**, **MASSCAN**, and **RDP** activity across seven endpoints. Investigators observed failed `ADMIN$` share mount attempts by two user accounts on one machine, indicating attempted lateral movement, and Blackpoint said it isolated affected systems within minutes before issuing remediation guidance. The incident underscores continued abuse of legitimate or allowlisted Windows administration and remote-access tools in operational environments. Sandbox analysis of **PCHunter64** shows the tool can go well beyond administration, including dropping signed driver components, creating Windows service registry entries such as `PCHUNTER64`, loading kernel drivers, deleting **SafeBoot** registry keys, and exhibiting anti-debugging and anti-VM behavior. The activity aligns with MITRE ATT&CK persistence techniques including **Windows Service** creation or modification (`T1543.003`) and boot or logon autostart execution (`T1547.008`), while additional indicators pointed to credential-access behavior, including an artifact consistent with **LSASS** minidump collection. Together, the references show how a dual-use utility can be weaponized for persistence, defense evasion, and deeper compromise inside Windows environments.
Jul 19, 2026