疑似Lazarus组织利用大宇造船厂为相关诱饵的系列攻击活动分析
2021-05-10 • Qianxin • Analysis of a series of attack activities by the suspected Lazarus organization using Daewoo Shipbuilding as related bait •
QiAnXin RedDrip analyzes activity suspected to involve Lazarus using Korean-language lures tied to Daewoo Shipbuilding, resident registration forms, and related East Asian themes. The samples used VBA macros to display decoy content, extract an HTA/JavaScript payload hidden in an image resource, and write a Winvoke.exe loader that decrypted and ran a RAT in memory. The malware established persistence through a startup shortcut, used a Microsoft32 mutex, and supported command execution and in-memory code loading from C2. The source links the activity to Lazarus through similarities in macros, second-stage loader behavior, and encryption traits resembling BISTROMATH RAT, while noting the samples mainly targeted East Asia.
Indicators of Compromise
| Type | Value | First Seen | Last Seen |
|---|---|---|---|
| HASH | 0996a8e5ec1a41645309e2ca395d3a6… | 2021-05-10 | 2024-07-25 |
| HASH | 6310cd9f8b6ae1fdc1b55fe190026a1… | 2021-05-10 | 2021-12-22 |
| HASH | 1177105e51fa02f9977bd435f906612… | 2021-05-10 | 2021-12-22 |
| HASH | b59e8f44822ad6bc3b4067bfdfd1ad2… | 2021-05-10 | 2021-12-22 |
| URL | http://snum.or.kr/skin_img/skin… | 2021-05-10 | 2021-12-22 |
| URL | http://www.ddjm.co.kr/bbs/icon/… | 2021-05-10 | 2021-12-22 |
| DOMAIN | snum.or.kr | 2021-05-10 | 2021-12-22 |
| HASH | ed5fbefd61a72ec9f8a5ebd7fa7bcd6… | 2021-04-19 | 2021-12-22 |
| URL | http://www.jinjinpig.co.kr/Anyb… | 2021-04-19 | 2021-12-22 |
| URL | http://mail.namusoft.kr/jsp/use… | 2021-04-19 | 2021-12-22 |
| DOMAIN | mail.namusoft.kr | 2021-04-19 | 2021-12-22 |
| HASH | 79e15cc02c6359cdb84885f6b84facb… | 2021-05-10 | 2021-11-01 |
| HASH | 0193bd8bcbce9765dbecb288d46286b… | 2021-05-10 | 2021-06-15 |
| HASH | 2dff6d721af21db7d37fc1bd8b673ec… | 2021-05-10 | 2021-06-15 |
| HASH | f6ab4e92dadd831dbc02a3cc27d2f6a… | 2021-05-10 | 2021-06-15 |
| HASH | f1eed93e555a0a33c7fef74084a6f8d… | 2021-04-19 | 2021-06-15 |
| HASH | 7d7ad10a5d9fa1789b9a918625dbfe35 | 2021-05-10 | 2021-05-10 |