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:

  • Bogus Avast website fakes virus scan, installs Venom Stealer instead

    March 27, 2026

    A fake website impersonating Avast antivirus is tricking people into infecting their own computers. The site looks legitimate, runs what appears to be a virus scan, and claims your system is full of threats. But the results are fake: when you’re prompted to “fix” the problem, the download you’re given is actually Venom Stealer—a type of ...

  • Infiniti Stealer: A new macOS infostealer using ClickFix and Python/Nuitka

    March 26, 2026

    A previously undocumented macOS infostealer has surfaced during our routine threat hunting. Malwarebytes Labs researchers initially tracked it as NukeChain, but shortly before publication, the malware’s operator panel became publicly visible, revealing its real name: Infiniti Stealer. This malware is designed to steal sensitive data from Macs. It spreads through a fake CAPTCHA page that tricks ...

  • Unpacking a new Horabot campaign in Mexico

    March 18, 2026

    In this instalment of Kaspersky SOC Files series, Kaspersky researchers will walk you through a targeted campaign that our MDR team identified and hunted down a few months ago. It involves a threat known as Horabot, a bundle consisting of an infamous banking Trojan, an email spreader, and a notably complex attack chain. Although previous research ...

  • Russian hackers target HR departments with vicious new ‘BlackSanta’ malware

    March 11, 2026

    Russian hackers have been targeting Human Resources (HR) departments at various organizations around the world with a never-before seen piece of malware called BlackSanta. The campaign was spotted by cybersecurity researchers Aryaka, who said the attacks have been going on for at least a year, and include a rather sophisticated infection chain. It most likely starts ...

  • BeatBanker: A dual‑mode Android Trojan

    March 10, 2026

    Recently, Kaspersky researchers uncovered BeatBanker, an Android‑based malware campaign targeting Brazil. It spreads primarily through phishing attacks via a website disguised as the Google Play Store. To achieve their goals, the malicious APKs carry multiple components, including a cryptocurrency miner and a banking Trojan capable of completely hijacking the device and spoofing screens, among other ...

  • US military contractor likely built iPhone hacking tools used by Russian spies in Ukraine

    March 10, 2026

    A mass hacking campaign targeting iPhone users in Ukraine and China used tools that were likely designed by U.S. military contractor L3Harris, TechCrunch has learned. The tools, which were intended for Western spies, wound up in the hands of various hacking groups, including Russian government spooks and Chinese cybercriminals. Last week, Google revealed that over the ...