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MalwaremediumExploited in the wild

KRBanker Targets South Korea Through Adware and Exploit Kits

Palo Alto Unit 42by Vicky Ray, Kaoru Hayashi ()5 min read3 · 2 reads
AI summary · glm-5.3-flashSummaries by Vani AI

Unit 42 details KRBanker banking trojan targeting South Korean bank users via KaiXin exploit kit and NEWSPOT adware, using pharming and process hollowing.

KRBanker (aka Blackmoon) is a banking trojan targeting online banking users in the Republic of Korea, with roughly 2,000 unique samples and 200+ pharming servers observed by Unit 42 over six months. It is distributed through the KaiXin exploit kit exploiting Adobe Flash CVE-2014-0569 and CVE-2015-3133, and through the NEWSPOT adware update channel that also delivers the Venik trojan. The trojan uses process hollowing, retrieves pharming server IPs from Qzone profile nickname fields, and abuses Proxy Auto-Config with a local proxy to redirect banking traffic to forged sites.

Key facts
  • Distributed by KaiXin exploit kit exploiting Adobe Flash CVE-2014-0569 and CVE-2015-3133.
  • NEWSPOT adware update channel installs KRBanker and Venik banking trojans.
  • Uses process hollowing and Proxy Auto-Config abuse for pharming.
  • Retrieves pharming server IPs from Qzone SNS API nickname fields.
  • About 2,000 unique samples and 200+ pharming servers observed in six months.
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Vulnerabilities mentioned

All
CVEVulnerabilityCVSSEPSSSignalsPublished
CVE-2014-0569
—92%—
CVE-2015-3133
—5%—

Indicators of compromise

auto-extracted · verify before use · export allAll
TypeIndicatorContext
domainnewspot.krnd starts getting configuration from the following URL: www.newspot[.]kr/config.php?sUID=[web site name] It downloads a file from
domainusers.qzone.qq.comuser information by sending QQ number to the following URL. users.qzone.qq.com/fcg-bin/cgi_get_portrait.fcg?uins=[QQ ID Number] The server
ipv423.107.204.38lowing is an example response that contains the IP address, 23.107.204[.]38 which is then extracted by KRBanker for Pharming. Figure

From the original article

5 min read at unit42.paloaltonetworks.com

Online banking services have been a prime target of cyber criminals for many years and attacks continue to grow. Targeting online banking users and stealing their credentials has yielded huge profits for the criminals behind these campaigns. Unit 42 has been tracking "KRBanker" AKA 'Blackmoon', since late last year.

Palo Alto Unit 42

By Vicky Ray, Kaoru Hayashi · unit42.paloaltonetworks.com

Read the full article at Palo Alto Unit 42

A short excerpt; the article and its images belong to the publisher. Summary, key facts and assessment above are AI-written from the article and can be wrong.