# Daily Intelligence Briefing — Friday, August 21, 2026

> On 2026-08-21, Threadlinqs published 15 new threat reports and updated 1, 4 rated critical and 11 high, spanning 157 MITRE ATT&CK techniques and 9 named threat actors. Coverage that day added 144 new detection rules and 352 extracted indicators.

- **Edition:** 2026-08-21 (Friday)
- **Canonical:** https://intel.threadlinqs.com/debrief/2026-08-21
- **Last updated:** 2026-08-27
- **New threats:** 15 (1 updated)
- **Critical / high:** 4 critical, 11 high, 1 medium, 0 low
- **ATT&CK techniques:** 157
- **Threat actors:** 9
- **Indicators (count only):** 352
- **New detection rules (count only):** 144

## Summary & highlights

Hospital for Sick Children (SickKids) Data Breach Exposes Employee Information via Third-Party Software Vulnerability. Russian APT29-linked clusters (UNC6293, UNC7005) and UNC5976 — OAuth phishing, device-code phishing, and captive portal compromise targeting academia, defense, and government across Europe and the US. LockBit 5.0 Ransomware Extortion Claim Against US Bank (U.S. Bancorp).

- [TL-2026-2091](https://intel.threadlinqs.com/threat/TL-2026-2091) — Russian APT29-linked clusters (UNC6293, UNC7005) and UNC5976 — OAuth phishing, device-code phishing, and captive portal compromise targeting academia, defense, and government across Europe and the US
- [TL-2026-2094](https://intel.threadlinqs.com/threat/TL-2026-2094) — LockBit 5.0 Ransomware Extortion Claim Against US Bank (U.S. Bancorp)
- [TL-2026-2095](https://intel.threadlinqs.com/threat/TL-2026-2095) — iAuthFlow V2 Phishing Toolkit Enrolls Attacker-Controlled Passkeys That Survive Password Resets
- [TL-2026-2096](https://intel.threadlinqs.com/threat/TL-2026-2096) — Chinese-speaking threat group UAT-10147 uses agentic AI to automate exploitation of internet-facing web servers
- [TL-2026-2098](https://intel.threadlinqs.com/threat/TL-2026-2098) — SynkLoader: New Multi-Module Malware Family Distributed via Microsoft Teams Phishing Campaign Targeting Enterprise Active Directory Environments

## Theme of the day

AI-powered attacks and autonomous agents drove today's threat landscape, targeting critical infrastructure and crypto wallets, while APT groups like APT38 and APT29 remained active.

credential-theft, social-engineering, data-exfiltration, defense-evasion, supply-chain-attack

## Threats published

- [TL-2026-2097](https://intel.threadlinqs.com/threat/TL-2026-2097) — CRITICAL — CISA Warns of Active Exploitation of Ray-Project Ray Code Injection Vulnerability (CVE-2025-62593) by RondoDox Botnet
- [TL-2026-2099](https://intel.threadlinqs.com/threat/TL-2026-2099) — CRITICAL — 14 Trojanized npm Packages Drop RedC2 4.0 Linux Backdoor With AI-Assisted C2
- [TL-2026-2105](https://intel.threadlinqs.com/threat/TL-2026-2105) — CRITICAL — 91 Spring Framework CVEs Disclosed by Broadcom, Including Critical Deserialization Flaw CVE-2026-59285
- [TL-2026-2079](https://intel.threadlinqs.com/threat/TL-2026-2079) — CRITICAL — Critical Elementor Pro unauthenticated file upload vulnerability leads to RCE on WordPress sites (CVE-2026-32475) (update)
- [TL-2026-2091](https://intel.threadlinqs.com/threat/TL-2026-2091) — HIGH — Russian APT29-linked clusters (UNC6293, UNC7005) and UNC5976 — OAuth phishing, device-code phishing, and captive portal compromise targeting academia, defense, and government across Europe and the US
- [TL-2026-2094](https://intel.threadlinqs.com/threat/TL-2026-2094) — HIGH — LockBit 5.0 Ransomware Extortion Claim Against US Bank (U.S. Bancorp)
- [TL-2026-2095](https://intel.threadlinqs.com/threat/TL-2026-2095) — HIGH — iAuthFlow V2 Phishing Toolkit Enrolls Attacker-Controlled Passkeys That Survive Password Resets
- [TL-2026-2096](https://intel.threadlinqs.com/threat/TL-2026-2096) — HIGH — Chinese-speaking threat group UAT-10147 uses agentic AI to automate exploitation of internet-facing web servers
- [TL-2026-2098](https://intel.threadlinqs.com/threat/TL-2026-2098) — HIGH — SynkLoader: New Multi-Module Malware Family Distributed via Microsoft Teams Phishing Campaign Targeting Enterprise Active Directory Environments
- [TL-2026-2100](https://intel.threadlinqs.com/threat/TL-2026-2100) — HIGH — Android Car Malware Spreads Through Built-In Updaters for Ad Fraud, Proxy Botnet
- [TL-2026-2101](https://intel.threadlinqs.com/threat/TL-2026-2101) — HIGH — SmartApeSG ClickFix Campaign Delivering Two-Stage RAT Infection via Fake CAPTCHA Social Engineering on Windows Hosts
- [TL-2026-2102](https://intel.threadlinqs.com/threat/TL-2026-2102) — HIGH — Visa Kernel 3 EMV Protocol Flaw — Zombie Card Relay Attack Enables Expired Contactless Card Purchases
- [TL-2026-2103](https://intel.threadlinqs.com/threat/TL-2026-2103) — HIGH — Troutman Pepper Locke LLP Data Theft Extortion by SilentRansomGroup (Repeat Attack Including Physical Intrusion)
- [TL-2026-2104](https://intel.threadlinqs.com/threat/TL-2026-2104) — HIGH — SDLC Supply Chain Attacks: ChainDrop npm Worm and Developer Pipeline Targeting
- [TL-2026-2109](https://intel.threadlinqs.com/threat/TL-2026-2109) — HIGH — Deepfake Investment Scam Ads Funnel Victims Into Fake-Analyst WhatsApp Groups (GoldBull, CoinLure)
- [TL-2026-2106](https://intel.threadlinqs.com/threat/TL-2026-2106) — MEDIUM — Hospital for Sick Children (SickKids) Data Breach Exposes Employee Information via Third-Party Software Vulnerability

## Techniques observed

AML.T0010.003, [AML.T0051.001](https://intel.threadlinqs.com/technique/AML.T0051.001), [AML.T0053](https://intel.threadlinqs.com/technique/AML.T0053), [T1003](https://intel.threadlinqs.com/technique/T1003), [T1003.001](https://intel.threadlinqs.com/technique/T1003.001), [T1005](https://intel.threadlinqs.com/technique/T1005), [T1007](https://intel.threadlinqs.com/technique/T1007), [T1014](https://intel.threadlinqs.com/technique/T1014), [T1016](https://intel.threadlinqs.com/technique/T1016), [T1020](https://intel.threadlinqs.com/technique/T1020), [T1021](https://intel.threadlinqs.com/technique/T1021), [T1021.001](https://intel.threadlinqs.com/technique/T1021.001), [T1027](https://intel.threadlinqs.com/technique/T1027), [T1033](https://intel.threadlinqs.com/technique/T1033), [T1036](https://intel.threadlinqs.com/technique/T1036), [T1036.005](https://intel.threadlinqs.com/technique/T1036.005), T1037.003, [T1037.004](https://intel.threadlinqs.com/technique/T1037.004), [T1041](https://intel.threadlinqs.com/technique/T1041), [T1046](https://intel.threadlinqs.com/technique/T1046), [T1048](https://intel.threadlinqs.com/technique/T1048), T1048.002, T1052.001, [T1053](https://intel.threadlinqs.com/technique/T1053), [T1053.003](https://intel.threadlinqs.com/technique/T1053.003), [T1053.005](https://intel.threadlinqs.com/technique/T1053.005), [T1055](https://intel.threadlinqs.com/technique/T1055), [T1055.001](https://intel.threadlinqs.com/technique/T1055.001), [T1055.004](https://intel.threadlinqs.com/technique/T1055.004), [T1055.012](https://intel.threadlinqs.com/technique/T1055.012), [T1056](https://intel.threadlinqs.com/technique/T1056), [T1056.001](https://intel.threadlinqs.com/technique/T1056.001), [T1057](https://intel.threadlinqs.com/technique/T1057), [T1059](https://intel.threadlinqs.com/technique/T1059), [T1059.001](https://intel.threadlinqs.com/technique/T1059.001), [T1059.003](https://intel.threadlinqs.com/technique/T1059.003), [T1059.004](https://intel.threadlinqs.com/technique/T1059.004), [T1059.005](https://intel.threadlinqs.com/technique/T1059.005), [T1059.007](https://intel.threadlinqs.com/technique/T1059.007), [T1070.004](https://intel.threadlinqs.com/technique/T1070.004), [T1070.006](https://intel.threadlinqs.com/technique/T1070.006), [T1071](https://intel.threadlinqs.com/technique/T1071), [T1071.001](https://intel.threadlinqs.com/technique/T1071.001), [T1078](https://intel.threadlinqs.com/technique/T1078), [T1082](https://intel.threadlinqs.com/technique/T1082), [T1083](https://intel.threadlinqs.com/technique/T1083), [T1087](https://intel.threadlinqs.com/technique/T1087), [T1090](https://intel.threadlinqs.com/technique/T1090), [T1090.001](https://intel.threadlinqs.com/technique/T1090.001), [T1090.002](https://intel.threadlinqs.com/technique/T1090.002), [T1095](https://intel.threadlinqs.com/technique/T1095), [T1098](https://intel.threadlinqs.com/technique/T1098), [T1098.005](https://intel.threadlinqs.com/technique/T1098.005), [T1105](https://intel.threadlinqs.com/technique/T1105), [T1106](https://intel.threadlinqs.com/technique/T1106), [T1110](https://intel.threadlinqs.com/technique/T1110), [T1112](https://intel.threadlinqs.com/technique/T1112), [T1114](https://intel.threadlinqs.com/technique/T1114), [T1115](https://intel.threadlinqs.com/technique/T1115), [T1119](https://intel.threadlinqs.com/technique/T1119), [T1123](https://intel.threadlinqs.com/technique/T1123), [T1125](https://intel.threadlinqs.com/technique/T1125), [T1133](https://intel.threadlinqs.com/technique/T1133), [T1134.001](https://intel.threadlinqs.com/technique/T1134.001), [T1135](https://intel.threadlinqs.com/technique/T1135), [T1136.001](https://intel.threadlinqs.com/technique/T1136.001), [T1140](https://intel.threadlinqs.com/technique/T1140), [T1190](https://intel.threadlinqs.com/technique/T1190), [T1195](https://intel.threadlinqs.com/technique/T1195), [T1195.001](https://intel.threadlinqs.com/technique/T1195.001), [T1195.002](https://intel.threadlinqs.com/technique/T1195.002), [T1199](https://intel.threadlinqs.com/technique/T1199), [T1203](https://intel.threadlinqs.com/technique/T1203), [T1204](https://intel.threadlinqs.com/technique/T1204), [T1204.001](https://intel.threadlinqs.com/technique/T1204.001), [T1204.002](https://intel.threadlinqs.com/technique/T1204.002), [T1213](https://intel.threadlinqs.com/technique/T1213), [T1213.002](https://intel.threadlinqs.com/technique/T1213.002), [T1218](https://intel.threadlinqs.com/technique/T1218), [T1219](https://intel.threadlinqs.com/technique/T1219), [T1222.002](https://intel.threadlinqs.com/technique/T1222.002), [T1485](https://intel.threadlinqs.com/technique/T1485), [T1489](https://intel.threadlinqs.com/technique/T1489), [T1496](https://intel.threadlinqs.com/technique/T1496), [T1497](https://intel.threadlinqs.com/technique/T1497), [T1497.001](https://intel.threadlinqs.com/technique/T1497.001), [T1498.001](https://intel.threadlinqs.com/technique/T1498.001), [T1499.003](https://intel.threadlinqs.com/technique/T1499.003), [T1499.004](https://intel.threadlinqs.com/technique/T1499.004), [T1505](https://intel.threadlinqs.com/technique/T1505), T1505.002, [T1505.003](https://intel.threadlinqs.com/technique/T1505.003), [T1518](https://intel.threadlinqs.com/technique/T1518), [T1528](https://intel.threadlinqs.com/technique/T1528), [T1530](https://intel.threadlinqs.com/technique/T1530), [T1534](https://intel.threadlinqs.com/technique/T1534), [T1539](https://intel.threadlinqs.com/technique/T1539), [T1543](https://intel.threadlinqs.com/technique/T1543), [T1543.002](https://intel.threadlinqs.com/technique/T1543.002), [T1543.003](https://intel.threadlinqs.com/technique/T1543.003), [T1546](https://intel.threadlinqs.com/technique/T1546), [T1547](https://intel.threadlinqs.com/technique/T1547), [T1547.001](https://intel.threadlinqs.com/technique/T1547.001), T1547.015, [T1548](https://intel.threadlinqs.com/technique/T1548), [T1548.002](https://intel.threadlinqs.com/technique/T1548.002), [T1550](https://intel.threadlinqs.com/technique/T1550), [T1550.001](https://intel.threadlinqs.com/technique/T1550.001), [T1552](https://intel.threadlinqs.com/technique/T1552), [T1552.004](https://intel.threadlinqs.com/technique/T1552.004), [T1553](https://intel.threadlinqs.com/technique/T1553), [T1553.002](https://intel.threadlinqs.com/technique/T1553.002), [T1554](https://intel.threadlinqs.com/technique/T1554), [T1555](https://intel.threadlinqs.com/technique/T1555), [T1555.003](https://intel.threadlinqs.com/technique/T1555.003), [T1557](https://intel.threadlinqs.com/technique/T1557), [T1560](https://intel.threadlinqs.com/technique/T1560), [T1564.001](https://intel.threadlinqs.com/technique/T1564.001), [T1565](https://intel.threadlinqs.com/technique/T1565), [T1565.001](https://intel.threadlinqs.com/technique/T1565.001), [T1565.002](https://intel.threadlinqs.com/technique/T1565.002), [T1566](https://intel.threadlinqs.com/technique/T1566), [T1566.001](https://intel.threadlinqs.com/technique/T1566.001), [T1566.002](https://intel.threadlinqs.com/technique/T1566.002), [T1566.004](https://intel.threadlinqs.com/technique/T1566.004), [T1567](https://intel.threadlinqs.com/technique/T1567), [T1567.002](https://intel.threadlinqs.com/technique/T1567.002), [T1568](https://intel.threadlinqs.com/technique/T1568), [T1569](https://intel.threadlinqs.com/technique/T1569), [T1570](https://intel.threadlinqs.com/technique/T1570), [T1571](https://intel.threadlinqs.com/technique/T1571), [T1572](https://intel.threadlinqs.com/technique/T1572), [T1573](https://intel.threadlinqs.com/technique/T1573), [T1573.001](https://intel.threadlinqs.com/technique/T1573.001), [T1574](https://intel.threadlinqs.com/technique/T1574), [T1583](https://intel.threadlinqs.com/technique/T1583), [T1583.001](https://intel.threadlinqs.com/technique/T1583.001), [T1583.006](https://intel.threadlinqs.com/technique/T1583.006), [T1583.008](https://intel.threadlinqs.com/technique/T1583.008), [T1584](https://intel.threadlinqs.com/technique/T1584), [T1585.001](https://intel.threadlinqs.com/technique/T1585.001), [T1585.002](https://intel.threadlinqs.com/technique/T1585.002), [T1587.001](https://intel.threadlinqs.com/technique/T1587.001), [T1588.006](https://intel.threadlinqs.com/technique/T1588.006), [T1588.007](https://intel.threadlinqs.com/technique/T1588.007), [T1589](https://intel.threadlinqs.com/technique/T1589), [T1591](https://intel.threadlinqs.com/technique/T1591), [T1595](https://intel.threadlinqs.com/technique/T1595), [T1598](https://intel.threadlinqs.com/technique/T1598), [T1608.006](https://intel.threadlinqs.com/technique/T1608.006), [T1620](https://intel.threadlinqs.com/technique/T1620), [T1649](https://intel.threadlinqs.com/technique/T1649), [T1657](https://intel.threadlinqs.com/technique/T1657), [T1684.001](https://intel.threadlinqs.com/technique/T1684.001), [T1685](https://intel.threadlinqs.com/technique/T1685), [T1685.005](https://intel.threadlinqs.com/technique/T1685.005), [T1686](https://intel.threadlinqs.com/technique/T1686)

## Threat actors

[APT29](https://intel.threadlinqs.com/actor/APT29), [LockBit](https://intel.threadlinqs.com/actor/LockBit), [PHISHLETS](https://intel.threadlinqs.com/actor/PHISHLETS), [UAT-10147](https://intel.threadlinqs.com/actor/UAT-10147), [MoYu Group](https://intel.threadlinqs.com/actor/MoYu%20Group), [SmartApeSG](https://intel.threadlinqs.com/actor/SmartApeSG), [SilentRansomGroup](https://intel.threadlinqs.com/actor/SilentRansomGroup), [RondoDox](https://intel.threadlinqs.com/actor/RondoDox), [MarlboroMan](https://intel.threadlinqs.com/actor/MarlboroMan)

Nation-state attribution: Russia, China

Threat categories: DATA_BREACH, APT, RANSOMWARE, MALWARE, THREAT_INTEL, VULNERABILITY, PHISHING, SUPPLY_CHAIN

## Severity breakdown

- critical: 4
- high: 11
- medium: 1
- low: 0

## Indicator & detection coverage

Counts only; indicator values require Red and above, detection rule text requires Blue and above.

- Indicators of compromise: 352 (network 138, file 99, infrastructure 25, package 23, tool 23, entity 19, behavioral 13, malware 12)
- New detection rules: 144 (100% of the day’s threats covered)

## More editions

- Previous: [2026-08-20](https://intel.threadlinqs.com/debrief/2026-08-20)
- Next: [2026-08-23](https://intel.threadlinqs.com/debrief/2026-08-23)
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Canonical: https://intel.threadlinqs.com/debrief/2026-08-21