Static Unpacking For The Widespread NSIS-Based Malicious Packer Family


Packers or crypters are widely used to protect malicious software from detection and static analysis. These auxiliary tools, through the use of compression and encryption algorithms, enable cybercriminals to prepare unique samples of malicious software for each campaign or even per victim, which complicates the work of antivirus software.

In the case of certain packers, classifying malicious software without employing dynamic analysis becomes a challenging task. To analyze a malicious sample and extract its configuration data, such as encryption keys and command and control server addresses, we must first unpack it. We can do this by running the malicious software in a sandbox environment, such as CAPE, followed by extracting the memory dumps. However, this method has some drawbacks.

Read more…
Source: Check Point


Sign up for our Newsletter


Related:

  • Operation North Star: Behind The Scenes

    November 5, 2020

    It is rare to be provided an inside view on how major cyber espionage campaigns are conducted within the digital realm. The only transparency afforded is a limited view of victims, a malware sample, and perhaps the IP addresses of historical command and control (C2) infrastructure. The Operation North Star campaign we detailed earlier this year ...

  • CISA, FBI, and CNMF Identify a New Malware Variant: ComRAT

    October 29, 2020

    The Cybersecurity and Infrastructure Security Agency (CISA), the Federal Bureau of Investigation (FBI), and the Department of Defense Cyber National Mission Force (CNMF) have identified a malware variant—referred to as ComRAT—used by the Russian-sponsored advanced persistent threat (APT) actor Turla. In addition, U.S. Cyber Command has released the malware sample to the malware aggregation tool and ...

  • New Abaddon RAT malware gets commands via Discord, has ransomware feature

    October 23, 2020

    The new ‘Abaddon’ remote access trojan may be the first to use Discord as a full-fledged command and control server that instructs the malware on what tasks to perform on an infected PC. Even worse, a ransomware feature is being developed for the malware. Threat actors abusing Discord for malicious activity is nothing new. In the past, ...

  • Wireshark Tutorial: Examining Dridex Infection Traffic

    October 23, 2020

    This tutorial is designed for security professionals who investigate suspicious network activity and review network packet captures (pcaps). Familiarity with Wireshark is necessary to understand this tutorial, which focuses on Wireshark version 3.x. Dridex is the name for a family of information-stealing malware that has also been described as a banking Trojan. This malware first appeared ...

  • On the trail of the XMRig miner

    October 22, 2020

    As protection methods improve, the developers of miners have had to enhance their own creations, often turning to non-trivial solutions. Several such solutions (previously unseen by us) were detected during our analysis of the open source miner XMRig. How it all began: ransominer Alongside well-known groups that make money from data theft and ransomware (for example, Maze, ...

  • Life of Maze ransomware

    October 21, 2020

    In the past year, Maze ransomware has become one of the most notorious malware families threatening businesses and large organizations. Dozens of organizations have fallen victim to this vile malware, including LG, Southwire, and the City of Pensacola. The history of this ransomware began in the first half of 2019, and back then it didn’t have ...