EMPERADOR Ransomware Gang: 4 New Victims Posted — Energy Sector Targeting, Edge-Device Exploitation & Detection Rules

Classification: TLP:AMBER+STRICT | Briefing Date: 2026-08-30 | Analyst Cell: Security Arsenal — From The Dark Side

Executive Summary

Security Arsenal dark web collection infrastructure has confirmed four (4) new victim postings on the EMPERADOR ransomware gang's .onion leak site within a 72-hour window (2026-08-27 through 2026-08-29). The campaign shows deliberate cross-sector reach with a notable strike against Hanwha Renewables (KR) — an Energy & Utilities operator — alongside U.S. transportation and a technology firm whose listing explicitly advertises "customer DB + full database backup", indicating successful bulk data theft prior to extortion.

Organizations running Check Point Security Gateways, Microsoft Exchange, or ConnectWise ScreenConnect instances should treat this as an active-exposure emergency: all three products carry CVEs currently listed in CISA's Known Exploited Vulnerabilities catalog with confirmed ransomware use, and they align with EMPERADOR's observed edge-device initial access pattern.

Threat Actor Profile — EMPERADOR

Confidence: Moderate. EMPERADOR is a low-volume actor; profile elements draw on confirmed leak-site data plus pattern-matching against structurally similar mid-tier RaaS operations. Intelligence gaps are flagged where assessments are inferred.

Current Campaign Analysis

Victim Postings (Confirmed via Leak Site Monitoring)

Sector Targeting

The victim set is deliberately diversified — Energy, Technology, Transportation, and Other — which is characteristic of affiliate-driven RaaS where initial access is purchased from brokers rather than developed against a single vertical. However, the Hanwha Renewables posting is the strategic signal: energy-sector victims generate maximum pressure-to-pay and maximum publicity, and EMPERADOR appears to be escalating toward critical-infrastructure-adjacent targets.

Geographic Concentration

South Korea and the United States are the confirmed targeting zones, with a probable LATAM victim (Uniguacu). KR energy targeting is notable — few mid-tier groups operate comfortably against Korean conglomerate (chaebol) infrastructure, suggesting either an affiliate with regional language capability or opportunistic exploitation of an unpatched edge device.

Victim Profile

• Size range: SMB (Capitol Mechanics) through large enterprise subsidiary (Hanwha Renewables)
• Revenue estimates: $5M–$50M (SMB transportation) up to $500M+ (energy subsidiary)
• Common thread: organizations with internet-facing remote access infrastructure and, in the Ipro.com case, large aggregated customer databases — the exfil-first targeting model

Posting Frequency / Escalation

Four postings in 72 hours represents a burst pattern — consistent with a gang either (a) clearing a backlog of completed intrusions to pressure non-paying victims simultaneously, or (b) ramping affiliate activity. Historically, burst posting precedes either a volume increase or a branding/relaunch event. Monitor weekly.

CVE Correlation — Likely Initial Access Vectors

Detection Engineering

The following detections target EMPERADOR's assessed TTP chain: edge exploitation → RMM/tool staging → lateral movement (PsExec/WMI) → data staging → shadow copy deletion → encryption.

---
title: EMPERADOR - Edge VPN/RMM Follow-On Lateral Tool Transfer via SMB Admin Share
id: 8f2a1c44-emp1-4a01-9b11-emp0001aa001
status: experimental
description: Detects PsExec-style service binary drops or tool staging to ADMIN$ shares shortly after edge-device (Check Point/ScreenConnect) access, matching EMPERADOR lateral movement behavior
author: Security Arsenal - From The Dark Side
date: 2026/08/30
references:
  - https://securityarsenal.com/darkside
  - https://www.cisa.gov/known-exploited-vulnerabilities-catalog
logsource:
  category: file_event
  product: windows
detection:
  selection_share:
    TargetFilename|contains:
      - '\ADMIN$\'
      - '\IPC$\'
  selection_binary:
    TargetFilename|endswith:
      - 'PSEXESVC.exe'
      - '.exe'
  filter_legit:
    SourceUser|contains: 'svc_sccm'
    SourceIp|startswith: '10.0.99.'
  condition: selection_share and selection_binary and not filter_legit
falsepositives:
  - SCCM/Intune software deployment
  - Legitimate admin tooling pushes
level: high
tags:
  - attack.lateral_movement
  - attack.t1021.002
  - attack.t1569.002
---
title: EMPERADOR - Pre-Encryption Volume Shadow Copy Deletion
id: 8f2a1c44-emp1-4a02-9b11-emp0002aa002
status: experimental
description: Detects vssadmin/wmic/bcdedit shadow copy deletion or boot-recovery tampering — near-universal pre-encryption step in EMPERADOR and peer RaaS playbooks
author: Security Arsenal - From The Dark Side
date: 2026/08/30
references:
  - https://securityarsenal.com/darkside
logsource:
  category: process_creation
  product: windows
detection:
  selection_vss:
    Image|endswith:
      - '\vssadmin.exe'
      - '\wmic.exe'
    CommandLine|contains:
      - 'delete shadows'
      - 'shadowcopy delete'
      - 'resize shadowstorage'
  selection_bcd:
    Image|endswith: '\bcdedit.exe'
    CommandLine|contains:
      - 'recoveryenabled no'
      - 'ignoreallfailures'
  selection_wmic_shadow:
    Image|endswith: '\powershell.exe'
    CommandLine|contains:
      - 'Win32_ShadowCopy'
      - 'Get-WmiObject Win32_Shadowcopy'
  condition: 1 of selection_*
falsepositives:
  - Backup software maintenance windows
  - IT storage reclamation scripts
level: critical
tags:
  - attack.impact
  - attack.t1490
  - attack.defense_evasion
---
title: EMPERADOR - Archive Staging via RAR/7z in User or ProgramData Paths
id: 8f2a1c44-emp1-4a03-9b11-emp0003aa003
status: experimental
description: Detects command-line archive creation of database/backup artifacts in staging directories — matches EMPERADOR exfil-before-encrypt pattern (customer DB + full database backup advertised on leak site)
author: Security Arsenal - From The Dark Side
date: 2026/08/30
references:
  - https://securityarsenal.com/darkside
logsource:
  category: process_creation
  product: windows
detection:
  selection_tool:
    Image|endswith:
      - '\rar.exe'
      - '\7z.exe'
      - '\7za.exe'
  selection_args:
    CommandLine|contains:
      - ' a '
      - ' -p'
  selection_path:
    CommandLine|contains:
      - 'ProgramData'
      - '\Users\Public\'
      - '.bak'
      - '.sql'
      - '.mdf'
      - 'backup'
  condition: selection_tool and selection_args and selection_path
falsepositives:
  - DBA scripted backups to nonstandard paths
level: high
tags:
  - attack.collection
  - attack.t1560.001
  - attack.exfiltration

Microsoft Sentinel hunt query — correlates edge-access events with lateral movement and staging behavior over a 14-day dwell-time window:

// EMPERADOR Hunt: Edge access -> internal lateral movement -> archive staging
// Lookback aligned to assessed 5-14 day dwell time
let Lookback = 14d;
let SuspectExternal = dynamic(["vpn-gateway", "checkpoint", "screenconnect", "rdp-brute"]);
let EdgeHits =
    SigninLogs
    | where TimeGenerated > ago(Lookback)
    | where ResultType == 0
    | where AppDisplayName has_any (SuspectExternal) or IPAddress in (externaldata(string)[h"https://ti-feed.example/iocs.csv"] with (format="csv"))
    | summarize FirstSeen=min(TimeGenerated) by UserPrincipalName, IPAddress;
let Lateral =
    SecurityEvent
    | where TimeGenerated > ago(Lookback)
    | where EventID in (4624, 4672, 7045)
    | where LogonType in (3, 10)
    | where Process has_any ("PSEXESVC", "wmiprvse") or ServiceName has_any ("PSEXESVC", "paexec", "remcom")
    | summarize LateralEvents=count(), Hosts=dcount(Computer), FirstLat=min(TimeGenerated) by Account;
let Staging =
    DeviceProcessEvents
    | where TimeGenerated > ago(Lookback)
    | where FileName in~ ("rar.exe","7z.exe","7za.exe")
    | where ProcessCommandLine has_any (".bak", ".sql", ".mdf", "backup", "ProgramData")
    | summarize StagingHosts=dcount(DeviceName), FirstStage=min(TimeGenerated) by InitiatingProcessAccountName;
EdgeHits
| join kind=inner (Lateral) on $left.UserPrincipalName == $right.Account
| join kind=leftouter (Staging) on $left.UserPrincipalName == $right.InitiatingProcessAccountName
| project UserPrincipalName, EdgeIP=IPAddress, FirstSeen, LateralEvents, Hosts, StagingHosts, FirstStage
| where FirstLat > FirstSeen
| sort by FirstSeen asc

Rapid-response script — enumerate scheduled tasks and shadow-copy state from the last 7 days to catch pre-detonation staging:

# EMPERADOR Rapid Triage: tasks + shadow copies + RDP exposure (last 7 days)
# Run elevated on suspect hosts or via remote PS session during IR
$cutoff = (Get-Date).AddDays(-7)

Write-Host "=== [1] Scheduled Tasks Created/Modified in Last 7 Days ===" -ForegroundColor Cyan
Get-ScheduledTask | ForEach-Object {
    $info = $_ | Get-ScheduledTaskInfo -ErrorAction SilentlyContinue
    $taskPath = "$($_.TaskPath)$($_.TaskName)"
    $xml = Export-ScheduledTask -TaskName $_.TaskName -TaskPath $_.TaskPath -ErrorAction SilentlyContinue
    if ($xml -match '<Date>(.*?)</Date>') {
        $created = [datetime]$Matches[1]
        if ($created -gt $cutoff) {
            [PSCustomObject]@{ Task = $taskPath; Created = $created; Author = $_.Author; State = $_.State }
        }
    }
} | Format-Table -AutoSize

Write-Host "=== [2] Volume Shadow Copy Status (deletion = pre-encryption indicator) ===" -ForegroundColor Cyan
$shadows = Get-CimInstance Win32_ShadowCopy -ErrorAction SilentlyContinue
if (-not $shadows) { Write-Host "WARNING: NO shadow copies present - possible vssadmin deletion!" -ForegroundColor Red }
else { $shadows | Select-Object DeviceObject, InstallDate, VolumeName | Format-Table -AutoSize }

Write-Host "=== [3] RDP Exposure Check ===" -ForegroundColor Cyan
$rdp = Get-ItemProperty 'HKLM:\SYSTEM\CurrentControlSet\Control\Terminal Server' -Name fDenyTSConnections
Write-Host ("RDP Enabled (0=enabled): {0}" -f $rdp.fDenyTSConnections)
Get-NetTCPConnection -LocalPort 3389 -State Listen -ErrorAction SilentlyContinue |
    Select-Object LocalAddress, LocalPort, OwningProcess | Format-Table -AutoSize

Write-Host "=== [4] Recent Shadow Deletion Events (System 8213 / Security 4688) ===" -ForegroundColor Cyan
Get-WinEvent -FilterHashtable @{LogName='System'; Id=8213; StartTime=$cutoff} -ErrorAction SilentlyContinue |
    Select-Object TimeCreated, Message | Format-List

Incident Response Priorities

T-Minus Detection Checklist — Catch EMPERADOR Before Encryption Fires

1. New local/domain admin accounts created outside change control (affiliate persistence)
2. vssadmin / bcdedit / wmic shadowcopy execution anywhere in the fleet — treat as a five-alarm pre-detonation signal
3. RAR/7z archives written to ProgramData, Users\Public, or adjacent to database/backup files — EMPERADOR exfil staging signature
4. ScreenConnect or unauthorized RMM processes on hosts that shouldn't run them
5. Anomalous outbound volume to cloud storage (MEGA, Dropbox, file[.]io-style temp shares) from servers, not workstations
6. Exchange IIS worker process (w3wp.exe) spawning cmd/powershell — deserialization post-exploitation (CVE-2023-21529)
7. New Windows services with random names (PsExec/paexec-style) appearing on multiple hosts within minutes — lateral spread in progress

Critical Assets EMPERADOR Prioritizes for Exfiltration

• Customer databases and full DB backups (explicitly advertised in the Ipro.com listing — this is their headline leverage)
• Financial records, payroll, and contracts (pressure material)
• Energy-sector: OT/ICS network diagrams, SCADA documentation, engineering files (if the Hanwha intrusion pattern holds)
• Email archives from Exchange (executive comms for secondary extortion)

Containment Actions — Ordered by Urgency

1. Isolate, don't reboot — network-isolate affected hosts immediately; preserve RAM for forensic capture of the encryption key material
2. Disable compromised edge access — force-reset all VPN/Check Point local accounts, revoke active IKE sessions, block ScreenConnect at the egress firewall
3. Kill RMM channels — block all unauthorized remote-access tooling domains/ports at the proxy
4. Rotate credentials enterprise-wide — domain admins, service accounts, KRBTGT (twice), VPN concentrator credentials
5. Snapshot/backup verification — confirm offline/immutable backups are intact before restoring anything; check for backup-console compromise
6. Egress clampdown — deny outbound to non-allowlisted cloud storage to sever active exfiltration
7. Engage IR retainer and legal/comms before responding to any ransom note; preserve the leak-site listing as evidence

Hardening Recommendations

Immediate (24 Hours)

• Patch or mitigate Check Point Security Gateway (CVE-2026-50751) — if patching is not possible, disable IKEv1 aggressively mode and restrict VPN portal exposure; this is the highest-probability EMPERADOR entry point
• Patch Exchange (CVE-2023-21529), ScreenConnect (CVE-2024-1708), Windows link-following (CVE-2025-60710) — all are CISA KEV with confirmed ransomware use; CISA remediation deadlines apply regardless of your sector
• Block PsExec/remote service creation on all servers that don't require it; enable Windows Defender ASR rule "Block process creations originating from PSExec and WMI commands"
• Alert on any shadow copy deletion as a critical-severity event (see Sigma rule above)
• Disable or restrict RAR/7z on servers via AppLocker/WDAC — legitimate backup tooling does not need interactive archive utilities
• MFA enforcement audit on all remote access (VPN, RDP gateways, RMM consoles) — no exceptions for service accounts

Short-Term (2 Weeks)

• Decommission or segment internet-facing remote access behind a Zero Trust broker; no VPN concentrator should terminate directly on the internal network
• Deploy immutable/offline backups (air-gap or object-lock WORM) with a restoration test this week — EMPERADOR's full-DB-backup theft model makes backup integrity your last line
• Egress data-loss controls: baseline server outbound traffic; alert on >5 GB/hour to non-corporate destinations
• EDR coverage gap closure on energy/OT-adjacent DMZ hosts — the Hanwha intrusion demonstrates these segments are in scope
• Tabletop the double-extortion scenario: legal, comms, and execs should rehearse the "our customer database is on a leak site" decision tree now, not during the incident

Security Arsenal continues active monitoring of the EMPERADOR leak site. Victim postings, TTP shifts, and new CVE correlations will be updated on the From The Dark Side hub. If your organization appears in a leak posting or you detect the indicators above, contact our IR team immediately — dwell time to detonation in these campaigns is measured in days.

Related Resources

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