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| Src | Date (GMT) | Titre | Description | Tags | Stories | Notes |
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2022-06-28 19:11:00 | Anomali Cyber Watch: API Hammering Confuses Sandboxes, Pirate Panda Wrote in Nim, Magecart Obfuscates Variable Names, and More (lien direct) | The various threat intelligence stories in this iteration of the Anomali Cyber Watch discuss the following topics: API hammering, APT, China, Phishing, Ransomware, Russia, 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
Lockbit Ransomware Disguised as Copyright Claim E-mail Being Distributed
(published: June 24, 2022)
ASEC researchers have released their analysis of a recent phishing campaign, active since February 2022. The campaign aims to infect users with Lockbit ransomware, using the pretense of a copyright claim as the phishing lure. The phishing email directs the recipient to open the attached zip file which contains a pdf of the infringed material. In reality, the pdf is a disguised NSIS executable which downloads and installs Lockbit. The ransomware is installed onto the desktop for persistence through desktop change or reboot. Prior to data encryption, Lockbit will delete the volume shadow copy to prevent data recovery, in addition to terminating a variety of services and processes to avoid detection.
Analyst Comment: Never click on suspicious attachments or run any executables from suspicious emails. Copyright infringement emails are a common phishing lure. Such emails will be straight forward to rectify if legitimate. If a copyright email is attempting to coerce you into opening attachments, such emails should be treated with extreme caution.
MITRE ATT&CK: [MITRE ATT&CK] Phishing - T1566 | [MITRE ATT&CK] Data Encrypted for Impact - T1486 | [MITRE ATT&CK] Impair Defenses - T1562
Tags: malware:Phishing, malware:Lockbit, Lockbit, Copyright, Ransomware
There is More Than One Way To Sleep: Deep Dive into the Implementations of API Hammering by Various Malware Families
(published: June 24, 2022)
Researchers at Palo Alto Networks have released their analysis of new BazarLoader and Zloader samples that utilize API Hammering as a technique to evade sandbox detection. API Hammering makes use of a large volume of Windows API calls to delay the execution of malicious activity to trick sandboxes into thinking the malware is benign. Whilst BazarLoader has utilized the technique in the past, this new variant creates large loops of benign API using a new process. Encoded registry keys within the malware are used for the calls and the large loop count is created from the offset of the first null byte of the first file in System32 directory. Zloader uses a different form of API Hammering to evade sandbox detection. Hardcoded within Zloader are four large functions with many smaller functions within. Each function makes an input/output (I/O) call to mimic the behavior of many legitimate processes.
Analyst Comment: Defense in depth is the best defense against sophisticated malware. The Anomali Platform can assist in detection of malware and Match anomalous activity from all telemetry sources to provide the complete picture of adversary activity within your network.
MITRE ATT&CK: [MITRE ATT&CK] Virtualization/Sandbox Evasion - T1497
Tags: malware:BazarLoad |
Ransomware Spam Malware Tool Vulnerability Threat | APT 28 APT 23 | |
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2022-06-23 18:40:55 | Chinese Tropic Trooper APT spreads a hacking tool laced with a backdoor (lien direct) | >China-linked APT group Tropic Trooper has been spotted previously undocumented malware written in Nim language. Check Point Research uncovered an activity cluster with ties to China-linked APT Tropic Trooper (aka Earth Centaur, KeyBoy, and Pirate Panda) which involved the use of a previously undescribed loader (dubbed “Nimbda”) written in Nim language. The Tropic Trooper APT has been active at least […] | Malware Tool | APT 23 | |
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2022-06-22 23:14:08 | Chinese Hackers Distributing SMS Bomber Tool with Malware Hidden Inside (lien direct) | A threat cluster with ties to a hacking group called Tropic Trooper has been spotted using a previously undocumented malware coded in Nim language to strike targets as part of a newly discovered campaign. The novel loader, dubbed Nimbda, is "bundled with a Chinese language greyware 'SMS Bomber' tool that is most likely illegally distributed in the Chinese-speaking web," Israeli cybersecurity | Malware Tool Threat | APT 23 |
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