云中谍影:Group123组织近期攻击活动分析

2023-07-11 • Qianxin • Spies in the Cloud: Analysis of recent attack activities by Group123 •

https://ti.qianxin.com/blog/articles/Cloud-Spy-Analysis-of-Recent-Attack-Activities-by-Group123-CN/

Thumbnail for 云中谍影:Group123组织近期攻击活动分析

Group123, also tracked as ScarCruft/APT-Q-3 and linked by the source to North Korea, has recently increased attacks against South Korean targets using oversized LNK files disguised as legitimate documents. The campaign uses spear-phishing-style archives containing decoy PDF/HWP content about Korean defense, diplomacy, North Korea policy, or audio lures; double-clicking the LNK runs PowerShell, drops a date-named BAT file in %temp%, and retrieves follow-on payloads from OneDrive. The payload chain XOR-decrypts and reflectively injects RokRAT, a long-running Group123 remote-access trojan that can capture screenshots, log keystrokes, perform anti-VM checks, and use cloud services such as OneDrive, Box, Dropbox, and Yandex for C2. The report also notes large junk-filled LNK files and custom use of an EmbedExeLnk-style builder as evasion and delivery mechanisms.

Indicators of Compromise

Type Value First Seen Last Seen
HASH 6a9019404330dc40ab945ec2006b9ff… 2023-07-11 2024-03-27
HASH b9baaae1a3bcdc9c8414a2d78ff53f1… 2023-07-11 2023-07-11
HASH 6d3cfa5898cb94f5eab676b1429063d… 2023-07-11 2023-07-11
HASH 5fa7c84550438bf4d3e4ef8f9098ba0… 2023-07-11 2023-07-11
HASH 57c573d19e2b67e78982023a0573098… 2023-07-11 2023-07-11
HASH 1351b19a424b6a294ac1b7c29034067… 2023-07-11 2023-07-11
HASH bcd61fa714cac8b38b0264fbcf82997… 2023-07-11 2023-07-11
HASH 3c06e27de64a0e1e1f278ab1e28bba8… 2023-07-11 2023-07-11
HASH e6c579edf5ee66dcf16fabc93c41394… 2023-07-11 2023-07-11
HASH df89db0ec339a5e5109ecced0199c37… 2023-07-11 2023-07-11
HASH 4056772ab9ec106046cc2dfbeed71df… 2023-07-11 2023-07-11
HASH f93754e660802d7cc70924cceb4738ef 2023-07-11 2023-07-11
HASH 0f0952cba356f9528527599edef4afb… 2023-07-11 2023-07-11
URL https://1drv.ms/i/s!AgK8WVCyy__… 2023-07-11 2023-07-11
URL https://1drv.ms/u/s!AtzyIIRGrnB… 2023-07-11 2023-07-11
URL http://vmi810830.contaboserver.… 2023-07-11 2023-07-11
URL https://api.onedrive.com/v1.0/s… 2023-07-11 2023-07-11
URL https://1drv.ms/i/s!AmDQ53DcLMU… 2023-07-11 2023-07-11
URL https://api.onedrive.com/v1.0/s… 2023-07-11 2023-07-11
URL https://api.onedrive.com/v1.0/s… 2023-07-11 2023-07-11
DOMAIN vmi810830.contaboserver.net 2023-07-11 2023-07-11
HASH f17ade8c0251c018ab291aa79c98377… 2023-05-23 2023-07-11
HASH bcfb79ae18a05f190bb0805dd39502f… 2023-05-18 2023-07-11
HASH 2d381a0156d8b0468d10dfd347b32cf… 2023-05-18 2023-07-11

Related Actors

Related Reports

« Back