securelist · Crawled Nov 5, 2026
Operation FlashHole: Lazarus breaks security, defies control
19 IoCs 1 Actors 2 Malware
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AI Summary
The Lazarus Group has launched a new attack campaign, dubbed Operation FlashHole, targeting organizations in South Korea's software, construction, and wired communication equipment manufacturing sectors. The campaign uses a multi-stage infection chain beginning with malicious websites hosted on GitHub Pages, which deliver a JavaScript-based initial payload that exploits the legitimate CrossWeb EX security software to execute malware in memory. The attackers deploy an updated set of known and newly identified malware variants—including TechHub, Cubridge, TouchHub, TouchShift, ClientHub, and LPEClient—to establish persistence, conduct reconnaissance, and load further payloads. The infrastructure leverages abused legitimate websites, GitHub repositories, and Dropbox for command and control, with post-quantum cryptography used in later stages to secure communications.
AI-extracted · verify before operational use
Extracted Entities 3 found
Indicators of Compromise 19 extracted
| Type | Value | Detail |
|---|---|---|
| Domain | javadevhouse[.]co[.]kr | Details → |
| Domain | pythonapischool[.]com | Details → |
| Domain | cubedesign[.]co[.]kr | Details → |
| Domain | fp-news[.]co[.]kr | Details → |
| Domain | k-wbc[.]co[.]kr | Details → |
| Domain | rcsh[.]co[.]kr | Details → |
| Domain | ksog[.]org | Details → |
| SHA-256 | ec84d6cb2ae7974767aedac246b50a3e | Details → |
| SHA-256 | a28cba214058fcae2883d8cffc883abd | Details → |
| SHA-256 | c105d6b16f544582772de0159f24c00a | Details → |
| SHA-256 | 2f8475a90a25624ed02f1d18d4e6d65d | Details → |
| SHA-256 | 676fabe30a28b53925fba98e34b35986 | Details → |
| SHA-256 | b4a7eff35f048f06fb0a2d7631f23a7d | Details → |
| SHA-256 | ff07641dc56914dd90ee0bd7404d7ad7 | Details → |
| Filename | mscoree.dll | Details → |
| Filename | ActivationStore.dat | Details → |
| Filename | msadc.inc | Details → |
| GitHub Repo | <username>/github.io | Details → |
| GitHub User | <username> | Details → |
MITRE ATT&CK TTPs 61 techniques
T1001 Data Obfuscation · Command And Control T1003 OS Credential Dumping · Credential Access T1018 Remote System Discovery · Discovery T1021.001 Remote Desktop Protocol · Lateral Movement T1021.002 SMB/Windows Admin Shares · Lateral Movement T1021.004 SSH · Lateral Movement T1021.006 Windows Remote Management · Lateral Movement T1027 Obfuscated Files or Information · Defense Evasion T1029 Scheduled Transfer · Exfiltration T1036.005 Match Legitimate Name or Location · Defense Evasion T1040 Network Sniffing · Credential Access T1053.005 Scheduled Task · Execution T1053.008 T1053.008 T1055 Process Injection · Defense Evasion T1057 Process Discovery · Discovery T1059 Command and Scripting Interpreter · Execution T1059.001 PowerShell · Execution T1059.003 Windows Command Shell · Execution T1059.005 Visual Basic · Execution T1068 Exploitation for Privilege Escalation · Privilege Escalation T1070.001 Clear Windows Event Logs · Defense Evasion T1070.004 File Deletion · Defense Evasion T1070.006 Timestomp · Defense Evasion T1071.001 Web Protocols · Command And Control T1071.004 DNS · Command And Control T1078 Valid Accounts · Defense Evasion T1082 System Information Discovery · Discovery T1083 File and Directory Discovery · Discovery T1085 T1085 T1087 Account Discovery · Discovery T1090 Proxy · Command And Control T1098 Account Manipulation · Persistence T1105 Ingress Tool Transfer · Command And Control T1129 Shared Modules · Execution T1133 External Remote Services · Persistence T1134 Access Token Manipulation · Defense Evasion T1190 Exploit Public-Facing Application · Initial Access T1195.001 Compromise Software Dependencies and Development Tools · Initial Access T1195.002 Compromise Software Supply Chain · Initial Access T1203 Exploitation for Client Execution · Execution T1204.002 Malicious File · Execution T1210 Exploitation of Remote Services · Lateral Movement T1218 System Binary Proxy Execution · Defense Evasion T1218.011 Rundll32 · Defense Evasion T1480 Execution Guardrails · Defense Evasion T1484 Domain or Tenant Policy Modification · Defense Evasion T1485 Data Destruction · Impact T1486 Data Encrypted for Impact · Impact T1495 Firmware Corruption · Impact T1496 Resource Hijacking · Impact T1534 Internal Spearphishing · Lateral Movement T1548 Abuse Elevation Control Mechanism · Privilege Escalation T1557 Adversary-in-the-Middle · Credential Access T1558 Steal or Forge Kerberos Tickets · Credential Access T1566 Phishing · Initial Access T1566.001 Spearphishing Attachment · Initial Access T1566.002 Spearphishing Link · Initial Access T1573.001 Symmetric Cryptography · Command And Control T1583 Acquire Infrastructure · Resource Development T1610 Deploy Container · Defense Evasion T1650 Acquire Access · Resource Development