Operation Dream Job by Lazarus

2021-01-26 JPCERT

https://blogs.jpcert.or.jp/en/2021/01/Lazarus_malware2.html

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JPCERT/CC’s English Operation Dream Job report analyzes Torisma and LCPDot malware used by Lazarus/Hidden Cobra. Torisma is a rundll32-executed downloader that loads C2 configuration from a signed local file, uses the VEST-32 algorithm and a repeated encryption key, and downloads encrypted modules after a two-stage HTTP POST exchange. LCPDot is described as a similar downloader, sometimes VMProtect-obfuscated, likely used for lateral movement after Torisma infection; it supports RC4-key and Base64-encoded C2 options and stores encoded configuration data. The report provides protocol details, configuration locations, module behavior, and C2 infrastructure useful for defensive hunting.

Indicators of Compromise

Type Value First Seen Last Seen
URL https://inovecommerce.com.br/pu… 2021-01-26 2021-04-27
DOMAIN mail.clicktocareers.com 2021-01-26 2021-04-27
DOMAIN inovecommerce.com.br 2021-01-26 2021-04-27
DOMAIN akramportal.org 2021-01-26 2021-04-27
DOMAIN vega.mh-tec.jp 2020-12-15 2021-04-27
HASH ff7172d9c888b7a88a7d77372112d772 2021-01-26 2021-01-28
HASH a9334efa9f40a36e7dde7ef1fe3018b… 2021-01-26 2021-01-28
HASH f77a9875dbf1a1807082117d69bdbdd… 2021-01-26 2021-01-26
HASH 9ae9ed06a69baa24e3a539d9ce32c43… 2021-01-26 2021-01-26
HASH ba57f8fcb28b7d1085e2e5e24bf2a46… 2021-01-26 2021-01-26
HASH 0c69fd9be0cc9fadacff2c0bacf59da… 2021-01-26 2021-01-26
HASH 7762ba7ae989d47446da21cd04fd6fb… 2021-01-26 2021-01-26
URL http://www.hirokawaunso.co.jp/w… 2021-01-26 2021-01-26
URL https://www.index-consulting.jp… 2021-01-26 2021-01-26
URL https://www.scimpex.com/admin/a… 2021-01-26 2021-01-26
URL https://ja-fc.or.jp/shop/shoppi… 2021-01-26 2021-01-26
URL http://kenpa.org/yokohama/main.… 2021-01-26 2021-01-26
URL https://www.fabianiarte.com/new… 2021-01-26 2021-01-26
URL https://mail.clicktocareers.com… 2021-01-26 2021-01-26
URL https://akramportal.org/public/… 2021-01-26 2021-01-26
URL https://www.leemble.com/5mai-ly… 2021-01-26 2021-01-26
URL https://www.commodore.com.tr/mo… 2021-01-26 2021-01-26
URL https://www.tronslog.com/public… 2021-01-26 2021-01-26
URL https://vega.mh-tec.jp:443/.wel… 2021-01-26 2021-01-26
DOMAIN kenpa.org 2021-01-26 2021-01-26
DOMAIN ja-fc.or.jp 2021-01-26 2021-01-26

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