{
	"id": "80517206-8b67-4151-844c-47717ae35713",
	"created_at": "2026-04-06T03:35:51.680269Z",
	"updated_at": "2026-04-10T03:37:40.655504Z",
	"deleted_at": null,
	"sha1_hash": "b7d522acdad578db2e351cd84aad9110b81459bc",
	"title": "DPRK hacking groups breach South Korean defense contractors",
	"llm_title": "",
	"authors": "",
	"file_creation_date": "0001-01-01T00:00:00Z",
	"file_modification_date": "0001-01-01T00:00:00Z",
	"file_size": 2561166,
	"plain_text": "DPRK hacking groups breach South Korean defense contractors\r\nBy Bill Toulas\r\nPublished: 2024-04-23 · Archived: 2026-04-06 02:53:29 UTC\r\nThe National Police Agency in South Korea issued an urgent warning today about North Korean hacking groups targeting\r\ndefense industry entities to steal valuable technology information.\r\nThe police discovered several instances of successful breaches of defense companies in South Korea involving the hacking\r\ngroups Lazarus, Andariel, and Kimsuky, all part of the North Korean hacking apparatus.\r\nAccording to the announcement, the attackers breached the organizations by leveraging vulnerabilities in targets' or their\r\nsubcontractors' environments to plant malware capable to exfiltrate data.\r\nhttps://www.bleepingcomputer.com/news/security/dprk-hacking-groups-breach-south-korean-defense-contractors/\r\nPage 1 of 5\n\n0:00\r\nhttps://www.bleepingcomputer.com/news/security/dprk-hacking-groups-breach-south-korean-defense-contractors/\r\nPage 2 of 5\n\nVisit Advertiser websiteGO TO PAGE\r\nThe National Police Agency and the Defense Acquisition Program Administration conducted a special inspection earlier this\r\nyear between January 15 and February 16 and implemented protective measures to secure critical networks.\r\nThis special operation discovered multiple companies that had been compromised since late 2022 but were unaware of the\r\nbreach until authorities informed them.\r\nDiverse attacks\r\nThe police report highlights three cases involving each of the mentioned hacking groups, displaying multi-faceted attack\r\nmethods aimed at stealing defense tech.\r\nLazarus hackers exploited poorly managed network connection systems designed for testing and penetrated the internal\r\nnetworks of a defense company since November 2022.\r\nAfter infiltrating the network, they gathered critical data stored in at least six of the firm's computers and transferred it to a\r\ncloud server abroad.\r\nLazarus attack overview\r\nKorean police\r\nThe second attack was attributed to the Andariel group, who stole account information from an employee of a maintenance\r\ncompany that serviced defense subcontractors.\r\nUsing this stolen account in October 2022, they installed malware on the servers of these subcontractors, leading to\r\nsignificant leaks of defense-related technical data.\r\nThis network infiltration was further exacerbated by employees using the same passwords for personal and work accounts.\r\nhttps://www.bleepingcomputer.com/news/security/dprk-hacking-groups-breach-south-korean-defense-contractors/\r\nPage 3 of 5\n\nAndariel attack overview\r\nKorean police\r\nA third attack highlighted in the police's advisory, Kimsuky exploited a vulnerability in the email server of a defense\r\nsubcontractor between April and July 2023, which allowed large files to be downloaded without the need to authenticate.\r\nThis vulnerability was used to download and steal substantial technical data from the company's internal server.\r\nKimsuky attack overview\r\nKorean police\r\nThe Korean police recommends both defense companies and their subcontractors to improve network security segmentation,\r\nperiodic password resets, setting up two-factor authentication on all critical accounts, and blocking foreign IP accesses.\r\nhttps://www.bleepingcomputer.com/news/security/dprk-hacking-groups-breach-south-korean-defense-contractors/\r\nPage 4 of 5\n\nAutomated Pentesting Covers Only 1 of 6 Surfaces.\r\nAutomated pentesting proves the path exists. BAS proves whether your controls stop it. Most teams run one without the\r\nother.\r\nThis whitepaper maps six validation surfaces, shows where coverage ends, and provides practitioners with three diagnostic\r\nquestions for any tool evaluation.\r\nSource: https://www.bleepingcomputer.com/news/security/dprk-hacking-groups-breach-south-korean-defense-contractors/\r\nhttps://www.bleepingcomputer.com/news/security/dprk-hacking-groups-breach-south-korean-defense-contractors/\r\nPage 5 of 5",
	"extraction_quality": 1,
	"language": "EN",
	"sources": [
		"ETDA"
	],
	"references": [
		"https://www.bleepingcomputer.com/news/security/dprk-hacking-groups-breach-south-korean-defense-contractors/"
	],
	"report_names": [
		"dprk-hacking-groups-breach-south-korean-defense-contractors"
	],
	"threat_actors": [
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			"created_at": "2022-10-25T15:50:23.347455Z",
			"updated_at": "2026-04-10T02:00:05.295717Z",
			"deleted_at": null,
			"main_name": "Andariel",
			"aliases": [
				"Andariel",
				"Silent Chollima",
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			"source_name": "MITRE:Andariel",
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			"source_id": "MITRE",
			"reports": null
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				"Subgroup: Andariel"
			],
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				"THALLIUM",
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				"GoBear",
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				"Operation Blacksmith",
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				"Operation GoldenAxe",
				"Operation INITROY/Phase 1",
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			"main_name": "Lazarus Group",
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				"Bureau 121",
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				"Operation GhostSecret",
				"APT 38",
				"Appleworm",
				"Unit 121",
				"ATK3",
				"G0032",
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				"Nickel Academy",
				"Sapphire Sleet",
				"Lazarus group",
				"Hastati Group",
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