Classification: TLP:CLEAR | Publication Date: 2026-09-29 | Source: ransomware.live leak-site monitoring (single-source for some listings — see Sourcing & Verification) | Nature of data: Unverified threat-actor claims

EMPERADOR Ransomware Gang: 5 New Leak-Site Listings — Sector Targeting Analysis & Detection Rules

Executive Summary

Security Arsenal's dark web monitoring has identified five new listings published to the EMPERADOR ransomware gang's Tor-based leak site between 2026-09-25 and 2026-09-28. The listings name organizations in the Technology, Manufacturing, Hospitality, and Transportation sectors, with claimed victims concentrated in Brazil, Sweden, and Germany.

These are unverified claims made by a criminal extortion group. A leak-site posting is an accusation, not evidence of compromise. No organization named in this briefing has been confirmed breached by this data. Defenders operating in the affected sectors and geographies should treat this as a prioritization signal for threat hunting — not as confirmation of any specific incident.

Key observations from this posting window:

• Five listings in four days (2026-09-25 through 2026-09-28), a compressed cadence suggesting either an active intrusion pipeline or bulk publication of previously staged access.
• Sector spread across four verticals, indicating opportunistic access-broker-driven targeting rather than a focused vertical campaign.
• Only one of the five listings was independently observed by a second leak-site crawler; the remaining four rest on a single source.

Organizations named by the gang are: Amazon Informatica (Technology, BR), Electrolux 2... (Manufacturing, SE), SiteProRentals (Hospitality, country unspecified), Car Service Abschlepp (Transportation, DE), and Electrolux & Ontrac (Manufacturing, country unspecified). EMPERADOR claims to have compromised these entities; none of these claims are confirmed.

Sourcing & Verification

Verification status of the five listings covered in this briefing:

• 1 of 5 listings (Amazon Informatica) was independently observed by a second leak-site crawler. This multi-source tier means two independent collection systems saw the gang publish the claim — it does not mean the underlying breach is confirmed.
• 4 of 5 listings (Electrolux 2..., SiteProRentals, Car Service Abschlepp, Electrolux & Ontrac) appear on a single source (ransomware.live) only, with no second-crawler confirmation that the postings even exist on the gang's site.

Inclusion in this briefing reflects the threat actor's claim and is not confirmation of a breach. Only the named organization or its regulator can confirm whether an incident occurred.

A named organization may dispute or deny a listing. A denial is likewise not proof the claim is false: disclosure obligations vary by jurisdiction and sector, and not every incident is legally reportable. Neither silence nor denial settles the question. Security Arsenal reports leak-site claims as threat-actor statements and nothing more.

Security Arsenal will publish corrections to this briefing if new information emerges. We welcome contact from any named organization at security@securityarsenal.com.

Threat Actor Profile — EMPERADOR

EMPERADOR is a ransomware operation tracked through its dedicated leak site (DLS) on the Tor network. The following profile is drawn from open-source tracking and observed leak-site behavior; attribution details for this group remain limited in public reporting, and readers should treat profile elements as assessed rather than confirmed.

• Aliases / branding: Tracked publicly under the name EMPERADOR. No widely documented aliases at time of publication; monitor for rebrand indicators (new DLS mirrors, changed onion addresses, recycled victim lists), which are common when groups attract law-enforcement attention.
• Operating model: Assessed as a small-to-mid-tier ransomware operation. Whether EMPERADOR runs an open Ransomware-as-a-Service (RaaS) affiliate program or operates as a closed group is not firmly established. The mixed sector and geography profile in this campaign is consistent with purchased initial access (access brokers) rather than in-house intrusion — a pattern seen in both models.
• Ransom demands: Demand sizing in this tier of operation typically scales to claimed victim revenue, ranging from low six figures (USD) for SMB targets to low seven figures for mid-market enterprises. Payment is demanded in cryptocurrency (Bitcoin or Monero), with deadlines enforced by staged data publication on the DLS.
• Initial access methods (assessed): Consistent with peer groups at this maturity level: exploitation of exposed remote access services (VPN concentrators, RDP), phishing with macro-enabled or ISO/IMG-containerized payloads, and purchase of brokered access. See the CVE exposure discussion below.
• Extortion approach: Double extortion — encryption of on-network assets paired with threatened publication of exfiltrated data on the DLS. The listings in this window are the public-facing pressure mechanism of that model.
• Dwell time: Mid-tier groups typically dwell days to a few weeks between initial access and detonation; the compressed 4-day posting cadence observed here may indicate multiple concurrent intrusions reaching the extortion stage simultaneously rather than a single fast operation.

Current Campaign Analysis

Sector Targeting

The five listings span four sectors:

Manufacturing's presence (two of five listings) tracks with the broader 2025-2026 ransomware ecosystem trend in which manufacturing remains the most-listed sector across DLS monitoring, owing to low tolerance for downtime and historically weaker OT/IT segmentation. Hospitality and Transportation listings suggest opportunistic access monetization rather than deliberate vertical strategy.

Geographic Concentration

Confirmed country tags: Brazil (1), Sweden (1), Germany (1); two listings carry no country tag. This transatlantic spread — LATAM plus EU — is characteristic of access-broker-driven operations where the buyer inherits whatever geography the broker's inventory provides. No single-country campaign logic is evident.

Victim Profile

Based on the sectors and the nature of the named entities (including what appears to be a small regional towing/transport operator in Germany and a mid-market Brazilian IT firm), the profile skews toward SMB-to-mid-market organizations — typically 50–2,500 employees and roughly $5M–$500M annual revenue. These are estimates inferred from sector and entity type, not verified financials. This size band is the sweet spot for mid-tier ransomware crews: large enough to pay meaningful ransoms, small enough to lack 24/7 SOC coverage and mature backup/DR discipline.

Posting Frequency & Escalation

Five listings in four days (2026-09-25, -09-27, -09-28 ×3) represents an elevated cadence. Two listings reference "Electrolux" in the name string ("Electrolux 2..." and "Electrolux & Ontrac") published three days apart — the naming pattern (including the "2" suffix) suggests the gang may be re-listing or re-pressuring a previously posted claim, a common escalation tactic when an initial listing fails to produce engagement. This is an observation about the gang's posting behavior, not a statement about any underlying incident.

CVE Exposure — Hypothesis Only

We have no evidence linking any specific CVE to any specific named listing. The following are CISA KEV entries with confirmed ransomware use that represent plausible sector-level exposure for organizations matching this victim profile. Treat these as hunt-and-patch hypotheses:

• CVE-2026-50751 — Check Point Security Gateway Improper Authentication (IKEv1): Perimeter VPN gateway compromise is the single most common ransomware initial access vector in this tier of operation. Any organization in the named sectors running unpatched Check Point gateways should treat this as a Priority-1 exposure.
• CVE-2026-20316 — Cisco Secure FMC Hard-coded Password: Network management plane takeover enables firewall rule manipulation, disabling of logging, and quiet lateral staging — consistent with pre-detonation tradecraft.
• CVE-2026-59310 — VMware vCenter Path Traversal: vCenter compromise is the classic precursor to mass hypervisor-level encryption (ESXi-targeting payloads). Manufacturing and hospitality environments with large virtualization estates are the typical impact zone.
• CVE-2026-63077 — JetBrains TeamCity Deserialization: CI/CD server compromise is a supply-chain-adjacent access path, particularly relevant to the Technology-sector listing pattern (build servers hold credentials, signing keys, and network trust).
• CVE-2026-48027 — Nx Console Embedded Malicious Code: A poisoned developer-tooling extension; relevant primarily to technology firms with Node.js/Nx development estates.

Patch validation against all five KEV entries is the immediate action for organizations in the affected sectors and geographies.

Detection Engineering

The detections below target the TTP cluster typical of EMPERADOR-tier operations: edge/VPN exploitation, macro-driven execution, RDP-based intrusion, PsExec/WMI lateral movement, and pre-encryption data staging and shadow copy destruction. Tune thresholds to your baseline.

---
title: Suspicious Authentication Burst on VPN or RDP Followed by Interactive Logon
id: 1f2a9c41-emp3r-4dor-8001-aa11bb22cc01
status: experimental
description: Detects clusters of failed external authentication against VPN/RDP edge services followed by a successful interactive or network logon — consistent with brute-force or credential-stuffing initial access used by mid-tier ransomware crews.
author: Security Arsenal Threat Intelligence
references:
  - https://securityarsenal.com/darkside
date: 2026/09/29
logsource:
  category: authentication
  product: windows
detection:
  selection_failed:
    EventID:
      - 4625
      - 529
      - 530
  selection_success:
    EventID: 4624
    LogonType:
      - 3
      - 10
  condition: selection_failed and selection_success
timeframe: 15m
level: high
tags:
  - attack.initial_access
  - attack.t1110
  - attack.t1078
---
title: Office Macro or Containerized Payload Spawning Script Interpreter
id: 1f2a9c41-emp3r-4dor-8002-aa11bb22cc02
status: experimental
description: Detects Office applications or ISO/IMG mount activity spawning cmd, PowerShell, wscript, cscript, mshta, or rundll32 — phishing execution chain typical of ransomware loader deployment.
author: Security Arsenal Threat Intelligence
references:
  - https://securityarsenal.com/darkside
date: 2026/09/29
logsource:
  category: process_creation
  product: windows
detection:
  selection_parent:
    ParentImage|endswith:
      - '\winword.exe'
      - '\excel.exe'
      - '\powerpnt.exe'
      - '\outlook.exe'
      - '\explorer.exe'
  selection_child:
    Image|endswith:
      - '\cmd.exe'
      - '\powershell.exe'
      - '\pwsh.exe'
      - '\wscript.exe'
      - '\cscript.exe'
      - '\mshta.exe'
      - '\rundll32.exe'
  filter_explorer_context:
    CommandLine|contains:
      - '.iso'
      - '.img'
  condition: selection_child and (selection_parent or (selection_parent and filter_explorer_context))
level: high
tags:
  - attack.execution
  - attack.t1204
  - attack.t1059
---
title: Pre-Encryption Staging — PsExec/WMI Lateral Movement and Shadow Copy Destruction
id: 1f2a9c41-emp3r-4dor-8003-aa11bb22cc03
status: experimental
description: Detects the pre-detonation toolkit — PsExec-style service creation, WMI remote process execution, or Volume Shadow Copy deletion — strongly correlated with ransomware staging in the 24-72h before encryption.
author: Security Arsenal Threat Intelligence
references:
  - https://securityarsenal.com/darkside
date: 2026/09/29
logsource:
  category: process_creation
  product: windows
detection:
  selection_psexec:
    Image|endswith:
      - '\psexec.exe'
      - '\psexesvc.exe'
      - '\paexec.exe'
  selection_wmi:
    ParentImage|endswith: '\wmiprvse.exe'
  selection_vss:
    Image|endswith:
      - '\vssadmin.exe'
      - '\wmic.exe'
      - '\bcdedit.exe'
    CommandLine|contains:
      - 'delete shadows'
      - 'shadowcopy delete'
      - 'recoveryenabled no'
  condition: 1 of selection_*
level: critical
tags:
  - attack.lateral_movement
  - attack.t1021
  - attack.t1047
  - attack.impact
  - attack.t1490

The following Sentinel hunt query surfaces the pre-ransomware staging pattern across a 7-day window — remote execution tooling, new service installs on multiple hosts, and shadow copy tampering, pivoted by source account and host.

// EMPERADOR-tier pre-ransomware staging hunt — lateral movement + backup destruction
// Lookback: 7 days. Tune the host-count threshold for environment size.
let lookback = 7d;
let RemoteExec =
    DeviceProcessEvents
    | where Timestamp > ago(lookback)
    | where FileName in~ ("psexec.exe","psexesvc.exe","paexec.exe","wmic.exe","wmiprvse.exe")
       or (InitiatingProcessFileName =~ "wmiprvse.exe")
    | project Timestamp, DeviceName, AccountName=InitiatingProcessAccountName,
              FileName, ProcessCommandLine, InitiatingProcessFileName;
let ServiceInstalls =
    DeviceEvents
    | where Timestamp > ago(lookback)
    | where ActionType == "ServiceInstalled"
    | extend ServiceName = tostring(parse_json(AdditionalFields).ServiceName)
    | project Timestamp, DeviceName, ServiceName;
let ShadowTamper =
    DeviceProcessEvents
    | where Timestamp > ago(lookback)
    | where ProcessCommandLine has_any ("delete shadows","shadowcopy delete","resize shadowstorage","recoveryenabled no")
    | project Timestamp, DeviceName, AccountName=InitiatingProcessAccountName, ProcessCommandLine;
RemoteExec
| summarize RemoteExecHosts=dcount(DeviceName), FirstSeen=min(Timestamp), LastSeen=max(Timestamp),
            Hosts=make_set(DeviceName, 20) by AccountName
| where RemoteExecHosts >= 3   // same account executing remote tooling on 3+ hosts
| join kind=leftouter (
    ShadowTamper
    | summarize ShadowEvents=count(), ShadowHosts=make_set(DeviceName, 20) by AccountName
  ) on AccountName
| project AccountName, RemoteExecHosts, FirstSeen, LastSeen, Hosts, ShadowEvents, ShadowHosts
| order by RemoteExecHosts desc;

The script below is a rapid-response collector for a suspected pre-detonation window: it enumerates scheduled tasks created in the last 7 days, recent service installs, shadow copy state, and RDP exposure on a target host. Run it on any host flagged by the detections above.

# EMPERADOR-tier rapid triage — run elevated on a suspect host
# Collects: new scheduled tasks (7d), new services (7d), VSS state, RDP exposure
$cutoff = (Get-Date).AddDays(-7)
$report = @()

Write-Host "=== [1] Scheduled tasks created/modified in last 7 days ===" -ForegroundColor Cyan
$tasks = Get-ScheduledTask | ForEach-Object {
    $info = $_ | Get-ScheduledTaskInfo -ErrorAction SilentlyContinue
    [PSCustomObject]@{
        TaskName   = $_.TaskName
        TaskPath   = $_.TaskPath
        Author     = $_.Author
        LastRun    = $info.LastRunTime
        Action     = ($_.Actions | ForEach-Object { "$($_.Execute) $($_.Arguments)" }) -join '; '
    }
} | Where-Object { $_.LastRun -gt $cutoff -or $_.Author -notmatch 'Microsoft' }
$tasks | Format-Table -AutoSize
$report += $tasks

Write-Host "=== [2] Services installed in last 7 days (7045 events) ===" -ForegroundColor Cyan
$svcs = Get-WinEvent -FilterHashtable @{LogName='System'; Id=7045; StartTime=$cutoff} -ErrorAction SilentlyContinue |
    Select-Object TimeCreated, @{n='ServiceName';e={$_.Properties[0].Value}}, @{n='Binary';e={$_.Properties[1].Value}}, @{n='Account';e={$_.Properties[4].Value}}
$svcs | Format-Table -AutoSize
$report += $svcs

Write-Host "=== [3] Volume Shadow Copy state ===" -ForegroundColor Cyan
$vss = Get-CimInstance Win32_ShadowCopy -ErrorAction SilentlyContinue |
    Select-Object ID, InstallDate, VolumeName, @{n='SizeMB';e={[math]::Round($_.UsedSpace/1MB,1)}}
if (-not $vss) { Write-Warning "NO shadow copies present — possible vssadmin deletion (T1490)." }
$vss | Format-Table -AutoSize

Write-Host "=== [4] RDP exposure check ===" -ForegroundColor Cyan
$rdpEnabled = (Get-ItemProperty 'HKLM:\SYSTEM\CurrentControlSet\Control\Terminal Server').fDenyTSConnections -eq 0
$rdpListening = Get-NetTCPConnection -LocalPort 3389 -State Listen -ErrorAction SilentlyContinue
$nla = (Get-ItemProperty 'HKLM:\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp' -Name UserAuthentication -ErrorAction SilentlyContinue).UserAuthentication
[PSCustomObject]@{
    RdpEnabled      = $rdpEnabled
    Port3389Listen  = [bool]$rdpListening
    NlaEnforced     = ($nla -eq 1)
    Recommendation  = if ($rdpEnabled -and $nla -ne 1) { 'DISABLE RDP or enforce NLA + VPN-gate immediately' } else { 'Review exposure against policy' }
} | Format-List

$report | Export-Csv -Path ".\emperador_triage_$(Get-Date -Format yyyyMMdd_HHmm).csv" -NoTypeInformation
Write-Host "Report exported. Escalate any 7045/service or VSS anomalies to IR immediately." -ForegroundColor Yellow

Incident Response Priorities

T-Minus Detection Checklist — Before Encryption Fires

EMPERADOR-tier operations follow a recognizable pre-detonation sequence. If you catch it here, you can prevent encryption entirely:

1. Edge device anomalies — new local accounts or config exports on VPN concentrators/firewalls (Check Point, Cisco FMC), unexpected firmware/config changes, management-plane logons from unusual sources.
2. Persistence establishment — new scheduled tasks, new services (Event ID 7045), new local admin accounts, RDP re-enabled on endpoints where it was disabled.
3. Credential access — LSASS memory access by non-system processes, NTDS.dit access attempts, DCSync-style replication requests from non-DC hosts.
4. Lateral movement — PsExec/PaExec artifacts (PSEXESVC service, ADMIN$ writes), WMI process creation (parent wmiprvse.exe), SMB admin-share writes spanning multiple hosts in a short window.
5. Staging/exfil — archive utility execution (rar.exe, 7z.exe, winrar.exe) against file servers, large outbound transfers to cloud storage or unfamiliar IPs (especially >1GB sustained), installation of Rclone or MEGAsync-style tooling.
6. Defense evasion — security tool tampering (EDR service stop attempts), event log clearing (Event ID 1102), shadow copy deletion (T1490) — this is your final warning shot; detonation typically follows within hours.

Critical Assets This Tier of Gang Prioritizes for Exfiltration

Consistent with double-extortion economics, expect targeting of:

• File servers and NAS shares containing HR records, payroll, and employee PII (maximum regulatory pressure).
• Finance/legal document stores — contracts, M&A material, litigation files.
• Email archives of executive and legal mailboxes.
• Backup infrastructure (Veeam/Commvault servers) — both for destruction and because backup catalogs map where the valuable data lives.
• Database exports from line-of-business applications — for manufacturing, ERP/MES data; for hospitality, guest/PII databases and booking platforms.

Containment Actions — Ordered by Urgency

1. Isolate at the edge first: block the identified C2/exfil destinations and disable any suspect VPN/firewall management accounts. Cutting exfil preserves your negotiating position even if encryption follows.
2. Disable compromised identities: force-reset any account observed in lateral movement; revoke sessions and tokens, not just passwords.
3. Segment, don't just shut down: isolate affected VLANs/subnets at the switch or firewall level. Indiscriminate shutdown destroys volatile forensic evidence and can trigger dead-man detonation logic.
4. Protect the backup plane: take backup infrastructure offline from the production network, verify offline/immutable copies exist, and snapshot backup server state before touching anything.
5. Preserve evidence: capture memory and triage images from patient-zero and any host showing PSEXESVC/WMI execution before remediation wipes artifacts.
6. Engage counsel and IR retainer early — disclosure clocks (LGPD for BR, GDPR for SE/DE) start on awareness of a confirmed incident, and leak-site claims often precede internal confirmation by days.

Hardening Recommendations

Immediate (24 hours)

• Patch or mitigate the five KEV exposures: CVE-2026-50751 (Check Point IKEv1 auth bypass), CVE-2026-20316 (Cisco FMC hard-coded password — rotate all FMC credentials regardless), CVE-2026-59310 (vCenter path traversal), CVE-2026-63077 (TeamCity), CVE-2026-48027 (Nx Console — audit developer workstations for the malicious extension version).
• VPN-gate or disable all inbound RDP (port 3389); enforce NLA where RDP must exist. The triage script above includes a quick exposure check.
• Enforce phishing-resistant MFA (FIDO2 or certificate-based) on all remote access, VPN, and email — credential replay is the cheapest door in.
• Deploy the Sigma detections above to your SIEM and validate alert routing to an on-call responder. A detection nobody reads is not a detection.
• Verify backup immutability: confirm at least one copy is offline, air-gapped, or object-locked, and that backup admin credentials are separate from domain admin credentials.
• Block archive/exfil tooling where not business-required: alert on rar.exe, 7z.exe, rclone.exe, and MEGAsync execution outside approved software inventory.

Short-term (2 weeks)

• Segment the estate: isolate OT/MES networks from IT (critical for manufacturing), separate the backup plane onto its own untrusted segment, and restrict SMB/RDP/WinRM lateral paths between workstation VLANs.
• Deploy EDR with tamper protection in blocking mode on all servers including hypervisor management planes (vCenter, ESXi hosts via supported agents or network detection).
• Implement egress filtering and DLP alerting on outbound transfers above a size threshold to unsanctioned destinations — exfil is the extortion leverage; make it visible.
• Harden CI/CD and developer tooling: network-isolate build servers (TeamCity and peers), rotate all secrets held in CI variables, and lock down browser/IDE extension installation via policy.
• Run a purple-team exercise against the detection content in this briefing to close telemetry gaps (Sysmon, Windows event forwarding, firewall/VPN log ingestion).
• Tabletop the leak-site scenario: decide now, before a claim appears, who monitors DLSs, who validates claims, and what the legal/communications playbook is when a criminal names your organization.

Related Resources

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