TLP:GREEN  ·  States / Public Sector
Payroll Pirates Storm M365, KEV Deadlines Loom:

ICS Advisories Surge Across State Government

ELEVATED. Unchanged from prior cycle. A sophisticated phishing campaign — dubbed "Payroll Pirates" — is actively targeting government organizations' Microsoft 365 environments with techniques that bypass multi-factor authentication. Meanwhile, a CISA Known Exploited Vulnerability deadline for a critical TeamCity flaw arrives tomorrow (August 8), a managed service provider tool used across state agencies has a confirmed authentication bypass under active exploitation, and three ICS/SCADA advisories dropped in 48 hours affecting systems common in state water and building infrastructure.

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DevelopmentDateWhy It Matters to State Government
Payroll Pirates / Storm-2657 M365 AitM campaign disclosedAug 7Government explicitly listed as target sector. Automated session hijack evades standard BEC detection. State payroll and HR staff are the intended victims.
CVE-2026-18577 (N-able N-central) added to CISA KEVAug 3Authentication bypass in RMM tool used by MSPs serving state agencies. Active exploitation confirmed. Hotfix available since Aug 2.
ABB Ability Zenon ICS advisory (ICSA-26-218-01)Aug 6SCADA/HMI platform used in water treatment and building automation. Multiple vulnerabilities allow security bypass and unauthorized control.
VeloCloud Orchestrator critical RCE corroborated by German BSIAug 7Second independent authority confirms unauthenticated root-level RCE in SD-WAN management platform used by distributed state networks.
Claude Code RCE via malicious pull requestsAug 7AI coding assistants can be weaponized through project configuration — relevant for state dev teams adopting AI tools.
Chrome 151 patches 6 critical vulnerabilitiesAug 7Rendering and authentication flaws affecting all managed endpoints.
CVE-2026-63077 (TeamCity) KEV deadlineAug 8FCEB compliance deadline is tomorrow. Unauthenticated RCE, CVSS 9.8, actively exploited.

DateEventSeverity
Jul 25Salt Typhoon & Volt Typhoon persistent access in state/National Guard networks disclosedCRITICAL
Aug 2N-able releases Hotfix 1 for CVE-2026-18577HIGH
Aug 3CISA adds CVE-2026-18577 (N-central auth bypass) to KEVHIGH
Aug 4keyv/cacheable npm supply chain worm discovered (CI/CD token theft)HIGH
Aug 5CVE-2026-63077 (TeamCity RCE, CVSS 9.8) added to KEVCRITICAL
Aug 6CISA publishes ABB Zenon, Johnson Controls TL280, Mitsubishi CC-Link ICS advisoriesHIGH
Aug 7Payroll Pirates M365 AitM campaign targeting government disclosedHIGH
Aug 7BSI corroborates VeloCloud Orchestrator critical RCEHIGH
Aug 8TeamCity KEV remediation deadline (tomorrow)CRITICAL

What it is: An active adversary-in-the-middle phishing campaign that steals M365 session tokens, rendering MFA ineffective. Attackers use voicemail-themed lures with six-stage redirect chains (Google Meet → Google Ads → AWS S3 → AitM proxy) and residential proxies to avoid geolocation-based detection.

Why state government should care: Government is explicitly listed as a target sector. Post-compromise, attackers use Microsoft Graph API to enumerate payroll, HR, and finance staff — then silently monitor mailboxes for weeks before attempting payroll diversion. The campaign has targeted hundreds of organizations in July 2026.

Novel tradecraft: Automated session refresh at precise 8-hour intervals from rotating residential proxy IPs maintains access indefinitely without triggering conditional access anomalies. This evades every standard BEC detection rule (no inbox rule creation, no MFA changes, no lateral phishing).

Confirmed indicator: Domain country[.]is used for geolocation API calls during proxy selection. Anomalous User-Agent strings: Firefox 131.0, Firefox 151.0, and Python Requests appearing on sessions claiming to be Microsoft Outlook clients.

T1557T1539T1090.002T1078.004T1087.003T1564.008

What it is: An incomplete patch bypass of CVE-2026-18556 in N-able N-central (versions through 2026.3.1) that allows authentication bypass and full account takeover. CVSS 8.1.

Why state government should care: Many state agencies rely on managed service providers (MSPs) that use N-central for remote monitoring and management. A compromised MSP gains trusted access to every client endpoint — this is the supply chain nightmare scenario. CISA's KEV addition confirms active exploitation in the wild.

Remediation: N-central 2026.3 Hotfix 1 (released August 2). If your MSP manages state endpoints via N-central, demand written confirmation of patch status today.

T1190

Three ICS advisories in 48 hours affect platforms deployed in state water treatment, building automation, and industrial control environments: ABB Ability Zenon (ICSA-26-218-01) — multiple vulnerabilities allowing security bypass, system crashes, and unauthorized control actions in SCADA/HMI systems; Johnson Controls TL280 — information disclosure vulnerability in building access control; Mitsubishi CC-Link — vulnerabilities in industrial networking protocol implementations.

Combined with the ongoing multi-state water utility PLC alert (BANISHED KITTEN / IRGC-affiliated targeting of water and wastewater PLCs across 7+ U.S. states), the OT attack surface for state infrastructure is expanding faster than patching cadence.

T0855T0831

CVSS 9.8. Actively exploited. FCEB compliance deadline is August 8. If your agency runs JetBrains TeamCity for CI/CD pipelines and has not patched, you are non-compliant tomorrow and exposed to a trivially exploitable, unauthenticated remote code execution vulnerability.

T1190

From the prior cycle and still unresolved: Chinese MSS-affiliated groups Salt Typhoon and Volt Typhoon maintain persistent access in state and National Guard networks using living-off-the-land techniques. Additional tracked actors with government targeting confirmed active as of August 7: APT29 (Russia/SVR), Sandworm (Russia/GRU), APT28 (Russia/GRU), APT41 (China/MSS), Turla (Russia/FSB), MuddyWater (Iran/MOIS), and APT40 (China/MSS).

Ransomware actors with confirmed state/local government targeting remain active: WARLOCK SPIDER (aliases GOLD SALEM/Storm-2603) and ROYAL SPIDER.

Intelligence collection confirms the following malware families actively targeting government entities: XWORM, MIRAI (IoT/OT), BEACON (Cobalt Strike), SNOWLIGHT, BEAVERTAIL, CADDYWIPER (destructive), and Latrodectus/BLACKWIDOW.

ScenarioProbabilityTimeframeBasis
Payroll Pirates targets state HR/payroll staffHIGH (75-85%)1-2 weeksGovernment explicitly listed; campaign scaling rapidly; hundreds of orgs targeted in July
Ransomware wave targeting state/local gov after 72-hour quiet periodMODERATE (50-60%)1-3 weeksOperational pauses historically precede new campaigns; Cactus, INC, Qilin all active
MSP compromise via N-central leading to state endpoint accessMODERATE (45-55%)2-4 weeksKEV confirms active exploitation; MSP supply chain is proven attack path
ICS exploitation attempt against state water/building systemsMODERATE (40-50%)1-3 monthsAdvisory volume increasing; BANISHED KITTEN precedent; Zenon/Johnson Controls exposure
VeloCloud Orchestrator exploitation in state SD-WANMODERATE (40-50%)2-4 weeksRoot-level RCE, corroborated by two authorities, common in distributed government networks

What to DetectATT&CK TechniqueDetection Logic
AitM session hijackT1557, T1539M365 sign-ins where reported client = "Microsoft Outlook" but User-Agent contains "Firefox" or "Python Requests"
Residential proxy authenticationT1090.002Block/alert on sign-ins from known residential proxy ASNs (Luminati/Bright Data, SOAX, Smartproxy)
8-hour session refresh patternT1078.004Recurring M365 sign-in events at 6-10 hour intervals from rotating IPs with same SessionID
Graph API enumerationT1087.003Bulk Users.Read.All or Mail.Read calls from newly authenticated sessions; alert on enumeration of payroll/HR/finance distribution lists
Email hiding rulesT1564.008New inbox rules that delete or move messages matching keywords: "payroll," "direct deposit," "ACH," "bank"
N-central auth bypassT1190Monitor N-central management console for authentication anomalies; unexpected admin sessions
ICS unauthorized commandsT0855, T0831Anomalous write commands to Zenon HMI stations; unexpected parameter modifications
Indicators of Compromise:
country[.]is
TypeValueContext
User-AgentFirefox 131.0, Firefox 151.0, Python RequestsAnomalous UAs on M365 sessions claiming Outlook client (Payroll Pirates)
CVECVE-2026-63077TeamCity unauthenticated RCE, CVSS 9.8, KEV deadline Aug 8
CVECVE-2026-18577N-central authentication bypass, CVSS 8.1, KEV active exploitation
CVECVE-2026-9198Langflow vulnerability (developer tooling)
AdvisoryICSA-26-218-01ABB Ability Zenon ICS vulnerabilities
AdvisoryWID-SEC-2026-2702VeloCloud Orchestrator critical RCE (BSI)

country[.]is is the geolocation API domain used by Payroll Pirates for residential proxy selection — block at DNS/proxy layer. Additional IOCs for the campaigns discussed in this report are available through Anomali ThreatStream Next-Gen and partner feeds.

Hunting Hypotheses:
HUNT 01
Payroll Pirates have already compromised state M365 accounts and are in the silent monitoring phase
Query Azure AD sign-in logs for the past 30 days for sessions with User-Agent mismatches (Outlook client claim + Firefox/Python UA). Check for recurring sign-ins at regular intervals (6-10 hours) from IP addresses in residential proxy ranges.
HUNT 02
An MSP serving state agencies is running unpatched N-central
Request N-central version attestation from all MSP vendors. Query endpoint management logs for N-central agent versions ≤ 2026.3.1.
HUNT 03
VeloCloud Orchestrator instances in state SD-WAN are internet-exposed
Scan for VeloCloud Orchestrator management interfaces accessible from untrusted networks. Verify authentication requirements and patch status.

Financial Services
State Revenue & Treasury
Primary threat
Payroll Pirates M365 AitM targeting finance staff for payroll diversion
Actions
  • Implement phishing-resistant authentication (FIDO2/passkeys) for all staff with access to payment systems
  • Enable Graph API audit logging
  • Brief payroll and accounts payable teams on voicemail-themed lure patterns
Energy
State Utility Operations
Primary threat
ABB Zenon ICS vulnerabilities; Volt Typhoon pre-positioning
Actions
  • Verify Zenon patch status per ICSA-26-218-01
  • Confirm network segmentation between IT and OT
  • Audit for living-off-the-land indicators (LOLBins) on systems adjacent to SCADA networks
Healthcare
Health & Human Services
Primary threats
Payroll Pirates (healthcare explicitly targeted); ransomware (Cactus, INC)
Actions
  • Enforce conditional access requiring managed devices for M365 access to systems containing PHI
  • Verify offline backup integrity for Medicaid/benefits systems
  • Brief HR staff on AitM lure patterns
Government
Executive Branch Agencies
Primary threats
Nation-state espionage (APT29, Salt Typhoon); M365 credential theft; ransomware
Actions
  • Confirm TeamCity patching before August 8 KEV deadline
  • Demand MSP attestation on N-central patch status
  • Implement 8-hour session anomaly detection
  • Review conditional access policies for residential proxy blocking
Aviation / Logistics
Transportation & Logistics
Primary threat
VeloCloud Orchestrator RCE in SD-WAN; supply chain compromise via MSP
Actions
  • Audit VeloCloud Orchestrator exposure and patch status
  • Verify SD-WAN management plane is not internet-accessible
  • Segment transportation ICS from enterprise network

Deploy conditional access policy requiring compliant/managed device for all M365 sign-ins. Block residential proxy ASNs from authentication flows.
IAM AnalystSOC Analyst
Create detection rule: M365 sign-ins where client claims "Microsoft Outlook" but User-Agent contains "Firefox" or "Python Requests."
SOC Analyst
Confirm TeamCity instances are patched for CVE-2026-63077. KEV deadline is August 8.
Incident Responder
Contact all MSPs using N-able N-central. Demand written confirmation that Hotfix 1 (2026.3 HF1) is applied. Escalate non-responses.
Incident ResponderCISO / Exec
Brief state payroll, HR, and finance directors on Payroll Pirates campaign. Emphasize that MFA alone does not protect against this attack.
CISO / Exec
No immediate actions for the selected roles.
Implement Graph API audit logging. Alert on bulk Users.Read.All and Mail.Read enumeration from new sessions.
SOC Analyst
Push Chrome 151.0.7922.108+ to all managed endpoints (6 critical vulnerabilities patched).
Incident Responder
Verify ABB Ability Zenon deployments in water treatment and building automation. Apply patches per ICSA-26-218-01. Confirm network segmentation of Zenon HMI stations.
ICS / OT
Audit VeloCloud Orchestrator instances for internet exposure. Apply available patches. Restrict management plane access to trusted networks only.
Incident Responder
Hunt for 8-hour session refresh anomaly pattern in Azure AD sign-in logs (past 30 days).
Threat Hunter
No 7-day actions for the selected roles.
Establish policy prohibiting auto-execution of MCP configurations from untrusted pull requests in AI coding assistants (Claude Code, Copilot). Require manual approval for project-scoped tool configuration changes.
CISO / Exec
Weight RMM vendor security posture (patch cadence, KEV history, architecture) in MSP contract renewals. N-central's second auth bypass in the same version line is a pattern.
CISO / Exec
Shift ICS vulnerability review from quarterly to monthly cadence. Three advisories in 48 hours indicates accelerating disclosure pace.
ICS / OT
Evaluate FIDO2/passkey deployment for high-value accounts (payroll, HR, finance, executive) as phishing-resistant MFA that defeats AitM attacks.
IAM Analyst
Conduct tabletop exercise: "MSP compromise leads to ransomware deployment across state agencies via RMM tool." Test communication plans, isolation procedures, and backup restoration.
CISO / ExecIncident Responder
No 30-day actions for the selected roles.
The Bottom Line

The threat environment facing state government IT this week is defined by a single theme: trusted systems being turned against you. Your M365 tenant — trusted. Your MSP's RMM tool — trusted. Your CI/CD pipeline — trusted. Your SD-WAN orchestrator — trusted. Every major finding this cycle involves adversaries exploiting that trust relationship. The Payroll Pirates campaign is particularly insidious because it operates below the detection threshold of conventional BEC monitoring. Your MFA is not broken — it is bypassed. Your conditional access policies are not failing — they are being satisfied by residential proxies that look like legitimate home workers. The 8-hour automated refresh pattern means compromised sessions persist indefinitely without any of the traditional indicators that trigger investigation. The actions in this brief are specific, prioritized, and time-bound. The conditional access changes and detection rules for Payroll Pirates can be implemented today. The MSP attestation call can happen this morning. The TeamCity patch status can be confirmed in the next hour.

1
Tomorrow's TeamCity KEV deadline is non-negotiable. If you have unpatched TeamCity instances, you are both non-compliant and actively exposed to a CVSS 9.8 unauthenticated RCE.
2
Has your MSP confirmed N-central patch status? A single compromised RMM console is the supply chain nightmare scenario for every client endpoint it manages.
3
Are your conditional access policies actually stopping Payroll Pirates? Residential proxies and 8-hour session refresh patterns are built specifically to look like legitimate traffic — assume compromise until you've hunted for it.
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