Organization

Arctic Wolf

1 mentions in 7 days · 4 in 30 days · 4 total · first seen Aug 27, 2026 · last 5d ago

Timeline4 articles

PaperCut Attacker Uses Hundreds of AI Agents to Compromise 440+ Instances

GreyNoise and Blackpoint tracked an AI-assisted actor using OpenAI Codex and DeepSeek agents to exploit PaperCut flaws across 440+ instances in 48 countries.

A suspected Russian-speaking actor exploited the CVE-2026-81578 authentication bypass and CVE-2026-82078 RCE chain in PaperCut NG/MF, compromising at least 440 instances across 395 organizations in 48 countries, heavily targeting education in the US, UK, France, and elsewhere. The actor used hundreds of AI agents powered by OpenAI Codex and DeepSeek plus tools like Mimikatz, SharpHound, Certipy, Rubeus, and Impacket, reaching domain admin at 12 victims and full domain admin at a US high school within seven minutes. Post-exploitation included registry hive collection and Metasploit/Meterpreter payloads, with origin traced to IP 45.142.193.132.

The Hacker Newsupdated Sep 11, 10:05 UTC · 4d agofirst Sep 10, 11:41 UTC · 5d agoThreat actor in the wild 9 sources CVE-2026-81578 CVE-2026-820781

Fake IT Calls Target Executives in Microsoft 365 Data Theft and Extortion Attacks

Arctic Wolf tracks PREY-0058, a vishing and AitM token-theft crew targeting Microsoft 365 executives for data theft and extortion.

Arctic Wolf disclosed a widespread data theft and extortion cluster, PREY-0058, which overlaps with Mandiant's UNC6671 and possibly the Pink/Cinder extortion groups. Attackers impersonate IT help desk staff by phone, direct executives to authentication-themed lure domains, and run adversary-in-the-middle Microsoft 365 logins to harvest credentials, MFA approvals, and session tokens replayed via residential proxies such as NodeMaven. After access, they run discovery in SharePoint and Entra ID, then bulk-exfiltrate data from SharePoint, OneDrive, Exchange, and Box before sending extortion demands. Targets are primarily US construction, healthcare, real estate, finance, and professional services organizations.

The Hacker NewsSep 7, 15:51 UTC · 8d agoThreat actor in the wild 2 sources1

PaperCut Flaws Exploited in Attacks on U.S. and European Schools

Attackers are chaining recently disclosed PaperCut flaws CVE-2026-81578 and CVE-2026-82078 to steal credentials and create privileged accounts at US and European schools.

Arctic Wolf researchers observed threat actors exploiting PaperCut servers via CVE-2026-81578 and CVE-2026-82078, chaining an authentication bypass with remote code execution. Post-exploitation included creating a privileged account named Administrator17, downloading credential-harvesting tools with certutil, Meterpreter Java payloads, and registry hive collection to recover the Windows BootKey and reach the SAM database. PaperCut disclosed active exploitation on August 27, 2026, and CISA added both flaws to its Known Exploited Vulnerabilities catalog on August 31. PaperCut has a history of exploitation, including attacks that delivered LockBit ransomware.

Security AffairsSep 5, 18:49 UTC · 10d agoExploit / PoC in the wildCVE-2026-81578 CVE-2026-82078

GoCaracal Malware Uses Ethereum Smart Contract to Fetch Replacement C2 Address

Arctic Wolf links new Go-based GoCaracal malware with Ethereum smart-contract C2 fallback to Dark Caracal, targeting a Venezuelan communications organization.

Arctic Wolf assessed with medium confidence that a June 2026 intrusion at an unnamed Venezuelan communications organization used GoCaracal, a previously undocumented Go-based malware framework linked to Dark Caracal. The lightweight profile provides encrypted C2, interactive shell access, and shellcode injection; the extended profile adds browser data theft, keylogging, WebRTC remote desktop, and SOCKS5 proxying. When the primary C2 server is unreachable, the malware queries an Ethereum smart contract via eth_getStorageAt at public JSON-RPC endpoints to fetch a replacement C2 address. Bandook was deployed in parallel, and Arctic Wolf published a YARA rule and indicators of compromise.

The Hacker NewsAug 27, 09:34 UTC · 19d agoMalware in the wild1

Related CVEsby mentions

CVE-2026-820789.42%
Unsafe Reflection RCE in PaperCut NG/MF, Chained with Auth Bypass in Attacks
CVE-2026-82078 is an unsafe dynamic class loading flaw (unsafe reflection, CWE-470) in the database connection utilities of PaperCut NG and PaperCut MF: the software instantiates a database driver class based on a configurable driver name without validating it against an allowlist of approved drivers. An attacker who can manipulate system configuration parameters can point that setting at classes of their choosing, causing the server to execute arbitrary Java bytecode residing on the application classpath in the security context of the PaperCut server process. On its own the issue is rated 9.4 (Critical) with high privileges required, but when chained with the companion authentication bypass CVE-2026-81578 it yields unauthenticated remote code execution on the print-management server. All PaperCut NG and MF deployments are in scope; affected version ranges were not specified in the available data, so administrators should consult PaperCut's advisory for fixed versions. The flaw is confirmed exploited in the wild as a zero-day: it was added to CISA's KEV catalog on 2026-08-31, and public reporting describes an AI-orchestrated campaign that compromised PaperCut servers at roughly 395 organizations (~440 servers), with EPSS currently at 1.7% (76th percentile).
· PaperCut NG · PaperCut MF KEVmass
CVE-2026-815788.82%
Missing Authentication for Critical Function in PaperCut NG/MF Web Interface
CVE-2026-81578 is an improper access control flaw (CWE-305) in the web management interface of PaperCut MF and PaperCut NG in which administrative requests from unauthenticated remote users trigger backend actions before access validation completes. An attacker can invoke administrative functions without logging in, allowing modification of certain system configurations. When chained with CVE-2026-82078 (unsafe dynamic class loading), the flaw has been used to achieve unauthenticated code execution. Any organization running PaperCut NG/MF, particularly servers whose web management interface is reachable from the internet or untrusted networks, is affected. The vulnerability was added to CISA KEV on 2026-08-31 and is being exploited in the wild as part of an AI-orchestrated campaign that compromised roughly 395–440 organizations.
· PaperCut MF · PaperCut NG KEVlarge

Appears with

vendor Arctic Wolf 3 vendor PaperCut 2 threat actor Pink 1 threat actor UNC6671 1 malware Bandook 1 malware GoCaracal 1 ai model DeepSeek 1 organization Mandiant 1 ai model OpenAI Codex 1 organization Blackpoint Cyber 1 organization CISA 1 organization Google 1 organization GreyNoise 1 organization LockBit 1 malware Meterpreter 1 threat actor PREY-0058 1

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