This chapter describes active botnet families under long-term tracking of and other families newly captured by NSFOCUS Security Labs, from the perspectives of their background, activity, and association with other families. Botnet Families GoBrut Malware in the GoBrut family, written in Go, made its debut in early 2019, in a bid to detect services on […]

1. Vulnerability Description On September 11, 2020, NSFOCUS detected that the Apache Software Foundation released security advisories fixing Apache DolphinScheduler permission overwrite vulnerability (CVE-2020-13922) and Apache DolphinScheduler remote code execution vulnerability (CVE-2020-11974). CVE-2020-11974 is related to mysql connectorj remote code execution vulnerability. When choosing mysql as database, an attacker could execute code remotely on the […]

1. Overview From data collected throughout 2019 and data as of June 30, 2020, we extracted information about malware, whose distribution by type is shown in Figure 1-1. Compared with 2019, the percentages of various types of malware in 2020 H1 changed, with backdoors overtaking crytominers to become No .1 with a percentage of 48.05%, […]

1. Vulnerability Description On September 11, 2020, NSFOCUS detected that the Apache Software Foundation released security advisories fixing Apache DolphinScheduler permission overwrite vulnerability (CVE-2020-13922) and Apache DolphinScheduler remote code execution vulnerability (CVE-2020-11974). CVE-2020-11974 is related to mysql connectorj remote code execution vulnerability. When choosing mysql as database, an attacker could execute code remotely on the […]

Overview On August 23, 2020, Beijing time, BT.CN released an urgent security update announcing that BT-Panel for Linux 7.4.2 and BT-Panel for Windows 6.8 are vulnerable. Unauthenticated phpmyadmin causes direct database login by accessing a specific address. BT-Panel is server management software that improves the operation and maintenance efficiency. It supports more than 100 server […]

Overview Overall, malware on mobile platforms, though evolving in the same way as those on PC, has a complex composition. In 2019, ad apps still dominated the list of malware threatening the security of Android users. Potentially dangerous software involving sensitive operations also made up a large proportion. Agent programs launching attacks via remote code […]

Vulnerability Description On August 24, QEMU released a security patch to fix a VM escape vulnerability (CVE-2020-14364) which is the result of an out-of-bounds read/write access issue in the USB emulator in QEMU. This vulnerability resides in ./hw/usb/core.c. When the program handles USB packets from a guest, this vulnerability is deemed to exist if USBDevice […]

Vulnerability Description On August 18, 2020, the China National Vulnerability Database (CNVD) listed SANGFOR Endpoint Detection Response (EDR) remote command execution vulnerability (CNVD-2020-46552) as a new entry. An unauthenticated attacker could exploit this vulnerability to send a maliciously crafted HTTP request to a target server, thereby obtaining the privileges of the target server and causing […]

This document dwells upon function identification and symbol porting in reverse engineering of Internet of things (IoT) devices without using BinDiff and PatchDiff2, which are “too good” for the purposes here and are inapplicable in certain scenarios. Typical function identification technologies include the Fast Library Identification and Recognition Technology (FLIRT) in IDA and the rizzo […]

Adware For many years, large grey software supply chains on the Internet have been showing their own prowess for self-promotion. A specific piece of software is often bundled with unnecessary software, even malware, during the download and installation.