EMPERADOR Ransomware Gang: 4 New Victims Posted — Sector Targeting Analysis & Detection Rules

Assessment date: 2026-09-11
Source basis: Live leak-site postings observed via ransomware.live, CISA KEV correlation, and Security Arsenal detection engineering.

Threat Actor Profile — EMPERADOR

EMPERADOR presents as an emerging-to-mid-tier ransomware operation whose current leak cadence is low volume but geographically dispersed. Public attribution remains limited, so the profile below separates confirmed observations from tradecraft inference.

• Known aliases: No high-confidence aliases are confirmed in the provided dataset. Treat EMPERADOR as the primary tracking name until cryptographic, leak-site, or infrastructure overlap proves otherwise.
• Operating model: Likely closed or semi-private ransomware-as-a-service. The victim mix is too small to prove a broad affiliate program, but the spread across Colombia, Bosnia and Herzegovina, India, and an unknown manufacturing victim suggests opportunistic access acquisition rather than a single-country crew.
• Ransom demand profile: Typical demands for comparable mid-tier crews range from low six figures for regional services firms to seven figures for manufacturing or government-adjacent targets. Expect negotiable opening demands and threats to publish samples before full dump release.
• Initial access methods: Prioritize edge-device compromise, exposed VPN/firewall management planes, phishing with macro or ISO-lure execution, RDP brute forcing, and purchase of access from initial access brokers. The KEV set below strongly supports perimeter auth bypass and management-plane abuse.
• Extortion approach: Double extortion is assumed: name-and-shame leak posting, sample leakage, threat of regulatory or national-security embarrassment for government/defense victims, and staged data release if payment stalls.
• Dwell time: For similarly opportunistic gangs, dwell time commonly ranges from 3 to 14 days from access to encryption when edge exploitation is used, and longer when access brokers hand off valid credentials. Hunt back at least 30 days for authentication anomalies and staging artifacts.

Current Campaign Analysis

Victim set observed

• EASY JOB S.A.S. — Professional Services, Colombia — published 2026-09-10
• Bosnia and Herzegovina Mine Action Center — Government & Defense, Bosnia and Herzegovina — published 2026-09-09
• BAYMER — Manufacturing, country unknown — published 2026-09-09
• Universal Starch-Chem Allied Ltd — Manufacturing, India — published 2026-09-09

Sector targeting

Three sectors are represented in the latest 100-posting slice: Professional Services, Government & Defense, and Manufacturing. The inclusion of a mine-action center is notable: it creates pressure through public-safety, donor, and government continuity concerns even if the victim is not a traditional defense contractor. Manufacturing victims suggest interest in operational disruption, intellectual property, ERP data, and customer or formulation records. Professional services remains attractive because one breach can expose downstream client data.

Geographic concentration

No single-country concentration is present. Observed countries are CO, BA, IN, with one unresolved country for BAYMER. This pattern usually indicates access-driven targeting: the crew takes what initial access brokers, vulnerable edge devices, or phishing outcomes provide rather than running a narrowly focused regional campaign.

Victim profile

The set spans likely small-to-midsize organizations and at least one public-interest government entity. Professional services and regional manufacturing firms often have lean security teams, flat networks, incomplete EDR coverage, and legacy VPN concentrators. Government and defense-adjacent organizations may have stronger policy but slower patch windows and complex interagency dependencies. Estimated revenue likely ranges from under $25M for local services firms to $50M-$500M for established manufacturers; impact can exceed revenue where chemical, industrial, or demining operations are involved.

Posting frequency and escalation

Four postings across two days is a visible escalation signal for a group with only four victims in the observed slice. A burst pattern like this often means either newly acquired access was monetized quickly, affiliates are batching leaks after encryption, or negotiations failed concurrently. Watch for repeat posting within 72-96 hours, sample-archive links, and pressure language referencing national security, safety, or client confidentiality.

CVE access-vector correlation

The following KEV items are relevant to initial access and privilege expansion paths consistent with this campaign profile:

• CVE-2026-20316 — Cisco Secure Firewall Management Center hard-coded password. If FMC is internet-reachable or reachable from a compromised admin segment, attackers can pivot from management-plane compromise to firewall policy manipulation, VPN credential access, and traffic interception.
• CVE-2026-50751 — Check Point Security Gateway improper authentication in IKEv1 key exchange. This is directly relevant to VPN edge compromise and remote access session establishment without normal authentication controls.
• CVE-2026-48027 — Nx Console embedded malicious code. Relevant to developer workstation or build-path compromise; useful for supply-chain entry into manufacturing and professional services environments with engineering or software teams.
• CVE-2024-1708 — ConnectWise ScreenConnect path traversal. Relevant to MSP and professional services compromise, remote support tooling abuse, and downstream client pivoting.
• CVE-2025-60710 — Microsoft Windows link following privilege escalation. Useful post-access for local elevation before disabling defenses, stealing credentials, and deploying encryptors.

Analytic judgment: The most plausible chain is edge auth weakness or remote access tooling compromise, followed by valid-account use, local privilege escalation, staged collection of file shares and database exports, then encryption and leak posting. Confirm with VPN authentication logs, EDR command lines, and outbound transfer telemetry.

Detection Engineering

---
title: EMPERADOR - Edge VPN and Firewall Management Plane Exploit Follow-On Activity
id: 9c7a2b6f-7a1b-4d9c-9a4d-2e6f0c8b9101
status: experimental
description: Detects suspicious authentication and process activity following exploitation of perimeter VPN, firewall management, or remote support tooling associated with EMPERADOR-style intrusion paths.
author: Security Arsenal
date: 2026/09/11
logsource:
  category: authentication
  product: vpn
  definition: Firewall, Check Point, Cisco Secure Firewall, Cisco FMC, SSL VPN, IKEv1, remote access gateway
detection:
  selection_auth:
    EventType|contains:
      - 'login'
      - 'authentication'
      - 'ike'
    Result|contains:
      - 'success'
      - 'allowed'
  selection_edge:
    SourceIP|contains:
      - '10.'
      - '172.16.'
      - '192.168.'
  filter_known_admins:
    User|contains:
      - 'svc_backup'
      - 'admin_breakglass'
  condition: selection_auth and not selection_edge and not filter_known_admins
falsepositives:
  - Legitimate remote administration from approved jump hosts
level: high
tags:
  - attack.initial_access
  - attack.t1190
  - attack.t1078
---
title: EMPERADOR - Lateral Movement via PsExec WMI or Remote Service Creation
id: 6db3f2e4-2c55-4a0c-8f2b-7d0a8d77b220
status: experimental
description: Detects remote service creation, PsExec-style service binaries, WMI process creation, and admin share writes often seen before ransomware deployment and data staging.
author: Security Arsenal
date: 2026/09/11
logsource:
  category: process_creation
  product: windows
detection:
  selection_parent:
    ParentImage|endswith:
      - '\wmiprvse.exe'
      - '\services.exe'
      - '\psexesvc.exe'
  selection_cli:
    CommandLine|contains:
      - '\\ADMIN$'
      - '\\IPC$'
      - 'psexec'
      - 'wmic'
      - 'sc.exe create'
      - 'schtasks /create'
      - 'net use'
  selection_paths:
    Image|endswith:
      - '\psexec.exe'
      - '\psexesvc.exe'
      - '\wmic.exe'
      - '\sc.exe'
      - '\schtasks.exe'
  condition: selection_parent and (selection_cli or selection_paths)
falsepositives:
  - Enterprise software deployment tools
  - SCCM or Intune maintenance windows
level: critical
tags:
  - attack.lateral_movement
  - attack.t1021
  - attack.t1047
  - attack.t1569.002
---
title: EMPERADOR - Pre-Ransomware Staging Exfiltration and Shadow Copy Tampering
id: 31d89a7c-0bb0-4b5f-9a7e-0c17f3ad9c33
status: experimental
description: Detects archive creation, cloud sync or exfil tooling, suspicious mass reads, and Volume Shadow Copy deletion used immediately before encryption and leak extortion.
author: Security Arsenal
date: 2026/09/11
logsource:
  category: process_creation
  product: windows
detection:
  selection_archive:
    CommandLine|contains:
      - '7z a'
      - 'rar a'
      - 'zip -r'
      - 'tar -czf'
      - 'restic backup'
      - 'rclone copy'
      - 'megacmd'
  selection_shadow:
    CommandLine|contains:
      - 'vssadmin delete shadows'
      - 'wmic shadowcopy delete'
      - 'bcdedit /set'
      - 'wbadmin delete catalog'
  selection_exfil_net:
    CommandLine|contains:
      - 'mega.nz'
      - 'transfer.sh'
      - 'file.io'
      - 'gofile.io'
      - 'backblaze'
      - 'wasabi'
  condition: 1 of selection_*
falsepositives:
  - Backup administrators running scheduled archive jobs
  - Developers packaging release artifacts
level: high
tags:
  - attack.collection
  - attack.t1560
  - attack.exfiltration
  - attack.t1048
  - attack.impact
  - attack.t1490

// Microsoft Sentinel hunt: EMPERADOR-style pre-ransomware staging and lateral movement
let Lookback = 14d;
let SuspiciousProcs = dynamic(['psexec.exe','psexesvc.exe','wmic.exe','sc.exe','schtasks.exe','rclone.exe','7z.exe','rar.exe','vssadmin.exe','wbadmin.exe']);
let AuthEvents =
    SigninLogs
    | where TimeGenerated >= ago(Lookback)
    | where ResultType == 0
    | summarize VPNAuthCount=count(), Apps=make_set(AppDisplayName), IPs=make_set(IPAddress) by UserPrincipalName, bin(TimeGenerated, 1h);
let Proc =
    DeviceProcessEvents
    | where TimeGenerated >= ago(Lookback)
    | where FileName in~ (SuspiciousProcs) or ProcessCommandLine has_any ('ADMIN$','IPC$','vssadmin delete shadows','rclone copy','7z a','sc.exe create','schtasks /create')
    | extend HourBucket = bin(TimeGenerated, 1h);
let Net =
    DeviceNetworkEvents
    | where TimeGenerated >= ago(Lookback)
    | where RemoteUrl has_any ('mega.nz','gofile.io','file.io','transfer.sh','backblaze','wasabi') or RemotePort in (443, 445, 3389, 22)
    | summarize DestCount=dcount(RemoteIP), Bytes=sum(BytesSent) by DeviceName, InitiatingProcessFileName, bin(TimeGenerated, 1h);
Proc
| join kind=leftouter Net on DeviceName, HourBucket
| join kind=leftouter AuthEvents on $left.AccountName == $right.UserPrincipalName, $left.HourBucket == $right.TimeGenerated
| summarize FirstSeen=min(TimeGenerated), Commands=make_set(ProcessCommandLine), Destinations=make_set(RemoteIP), MaxBytes=sum(BytesSent) by DeviceName, AccountName, FileName
| where MaxBytes > 200000000 or Commands count > 3
| order by FirstSeen desc;

# Rapid EMPERADOR response triage: exposed RDP, new persistence, shadow copies, suspicious outbound tools
$Days = 7
$Since = (Get-Date).AddDays(-$Days)
Write-Host '[1] RDP exposure and listeners'
Get-NetTCPConnection -State Listen | Where-Object {$_.LocalPort -in 3389,5985,5986} | Select-Object LocalAddress,LocalPort,OwningProcess

Write-Host '[2] Scheduled tasks created in last 7 days'
Get-ScheduledTask | Where-Object {$_.Date -ge $Since} | Select-Object TaskName,TaskPath,Date,Author

Write-Host '[3] Volume Shadow Copy status'
vssadmin list shadows
Get-CimInstance Win32_ShadowCopy | Select-Object DeviceObject,InstallDate,VolumeName

Write-Host '[4] Recent unsigned binaries in staging paths'
$Paths = @('C:\\\\\\\\\\	emp','C:\\Windows\\Temp','$env:PUBLIC','C:\\ProgramData')
foreach ($p in $Paths) { if (Test-Path $p) { Get-ChildItem $p -Recurse -File -ErrorAction SilentlyContinue | Where-Object {$_.LastWriteTime -ge $Since -and $_.Extension -in '.exe','.dll','.ps1','.bat'} | Select-Object FullName,Length,LastWriteTime } }

Write-Host '[5] Exfil and lateral tools present'
Get-ChildItem -Path C:\ -Recurse -Include rclone.exe,7z.exe,rar.exe,psexec.exe,psexesvc.exe,megacmd.exe -ErrorAction SilentlyContinue | Select-Object FullName,LastWriteTime

Write-Host '[6] Edge CVE exposure checklist reminder'
Write-Host 'Patch/verify: Cisco FMC CVE-2026-20316, Check Point IKEv1 CVE-2026-50751, Nx Console CVE-2026-48027, ScreenConnect CVE-2024-1708, Windows link-follow CVE-2025-60710.'

Incident Response Priorities

T-minus detection checklist: before encryption fires

• New successful VPN, firewall admin, or remote-support logins from unusual ASN, geography, or impossible-travel patterns.
• Cisco FMC, Check Point, ScreenConnect, or remote management interface logins outside change windows.
• Sudden discovery commands: net group, nltest, adfind, sharphound-like collection, arp scans, and LDAP enumeration.
• Remote service creation, PsExec clones, WMI process creation, scheduled tasks on file servers, backup servers, and domain controllers.
• Archive creation in shares containing HR, finance, engineering drawings, chemical formulations, client contracts, donor data, or government case files.
• Large outbound transfers to consumer file-sharing, object storage, MEGA-like services, or uncommon VPS endpoints over 443.
• Shadow copy deletion, backup catalog deletion, recovery mode changes, EDR tamper attempts, or mass renaming before visible ransom notes.

Critical assets this gang historically prioritizes for exfiltration

Because EMPERADOR attribution is still forming, use the victim set as the prioritization guide:

• Government & defense-adjacent: case records, personnel files, interagency correspondence, operational plans, grant and donor documents.
• Manufacturing: ERP exports, PLCs or plant network documentation, bills of material, formulas, QA records, supplier pricing, customer contracts.
• Professional services: client matter files, payroll, tax records, credentials in documentation systems, remote-support configurations that enable downstream pivoting.
• Cross-sector: backup configurations, password vault exports, VPN profiles, firewall rule exports, and mailbox PST archives.

Containment actions ordered by urgency

1. Disable suspect accounts and revoke all active VPN, firewall admin, remote-support, SSO, and refresh tokens.
2. Isolate affected segments at the switch or firewall level; prioritize file servers, backup infrastructure, domain controllers, ERP, and OT-adjacent jump hosts.
3. Block outbound exfil destinations and force all egress through authenticated proxy where possible.
4. Preserve memory, VPN logs, firewall admin logs, EDR telemetry, DNS, proxy, and authentication records before remediation overwrites evidence.
5. Snapshot virtual machines and backup repositories offline; validate immutable backup integrity before restoring anything.
6. Reset exposed credentials in a controlled sequence: domain admins, service accounts, backup accounts, VPN users, firewall admins, then local admins.
7. Engage legal, communications, and regulatory counsel early if government, defense, safety, or client data may be involved.

Hardening Recommendations

Immediate — 24 hours

• Patch or mitigate CVE-2026-20316, CVE-2026-50751, CVE-2024-1708, CVE-2026-48027, and CVE-2025-60710. If patching is impossible, remove management interfaces from the internet and enforce allow-listed admin source IPs.
• Disable IKEv1 where not required on Check Point gateways and rotate VPN pre-shared keys and local accounts.
• Enforce phishing-resistant MFA for VPN, firewall management, remote support, SSO, and privileged accounts.
• Block inbound RDP from the internet; require VPN plus device compliance plus brokered access.
• Deploy alerting for vssadmin, wbadmin, bcdedit, rclone, 7z, PsExec, WMI process creation, and remote service creation.
• Enable attack surface reduction rules for Office macros, script abuse, credential theft, and tamper protection.
• Lock down ScreenConnect or equivalent remote support with unique per-client agents, MFA, IP allow lists, and complete removal where unused.

Short term — 2 weeks

• Segment networks into identity-aware zones: user, server, backup, OT/manufacturing, development, and management planes.
• Move backup control planes to isolated credentials, immutable storage, and separate administrative forests or privileged access workstations.
• Implement egress data-loss controls: deny unsanctioned file-sharing domains, alert on rare destination ASNs, and require proxy authentication.
• Establish canary shares and high-interaction file tripwires on HR, finance, engineering, and government case repositories.
• Create a ransomware runbook that predefines isolation authority, evidence preservation, legal notification thresholds, and negotiation decision points.
• Validate detection coverage against ATT&CK T1190, T1078, T1021, T1047, T1560, T1048, T1490, and T1486 with regular purple-team exercises.

Related Resources

Security Arsenal Incident Response Managed SOC & MDR Services AlertMonitor Threat Detection From The Dark Side Intel Hub