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THE HUNTER’S LEDGER
ATT&CK Technique · Credential Access
T1539 Steal Web Session Cookie
Mapped by 6 reports, 5 detection rules and 5 tracked actors on The Hunters Ledger. Technique page on attack.mitre.org.

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Reports

Each report maps this technique in its own ATT&CK table, at the confidence the report states. The link opens that table.

Report Aug 2026 · under Credential Access · MODERATE
CloudSync: An Assembler's Intrusion Toolkit
Report Jul 2026 · under Credential Access · HIGH
EvilSoul-Engine: A Brazilian Stealer-Builder Malware-as-a-Service
Report May 2026 · under Credential Access · HIGH
Rhadamanthys MaaS Customer Deep-Dive (79.137.192.3)
Report Feb 2026 · under Credential Access · HIGH
Remcos RAT OpenDirectory Campaign
Report Dec 2025 · under Credential Access · MODERATE
PULSAR RAT (server.exe) — Technical Analysis & Business Risk Assessment

Detection rules

Rules whose ATT&CK coverage line names this technique, by detection page. The link opens the page's coverage table.

Detection rules Jul 2026 · 4 rules
EvilSoul-Engine: A Brazilian Stealer-Builder Malware-as-a-Service
EvilSoul-Engine Maploot/Tinarox Discord-Embed Exfil Titles (YARA, Detection); xaitax ChromElevator ABE-Bypass Tool: @breakingupslow Fork (YARA, Detection); Browser Relaunched with CDP Debugging by Non-Browser Parent (SIGMA, Detection); Python Process Opens LSASS Handle (ABE Decryptor Pattern) (SIGMA, Detection)
Detection rules Feb 2026 · 1 rule
Remcos RAT OpenDirectory Campaign
Remcos RAT Non-Browser Process Accessing Browser Credential Store Files (SIGMA, Hunting)

Tracked actors

Designations whose reports map this technique.

  • UTA-2026-008: Developer and operator of the BellaMain Turkish phishing-as-a-service panel
  • UTA-2026-009: Multi-product fraud operator pairing a real VPN service with a brand-impersonation phishing library
  • UTA-2026-010: Rhadamanthys MaaS customer with a self-built loader (customer side only, never the vendor)
  • UTA-2026-018: Hands-on-keyboard operator exploiting four Southeast Asian governments with a bespoke edge-device toolkit
  • UTA-2026-021: Assembler-model intrusion operator staging other actors' tooling against one German victim forest

ATT&CK v19.2. MITRE ATT&CK® is a registered trademark of The MITRE Corporation; technique names are MITRE's and link to MITRE's own pages. The mapping on each linked page is this publication's reading of its own evidence.