Deep Dive into a Dumped Malware without a PE Header


This analysis is part of an incident investigation led by the FortiGuard Incident Response Team.

Fortiguard Incident Response Team discovered malware that had been running on a compromised machine for several weeks. The threat actor had executed a batch of scripts and PowerShell to run the malware in a Windows process. Although obtaining the original malware executable was difficult, a memory dump of the running malware process and a full memory dump of the compromised machine (the “fullout” file, size 33GB) were successfully acquired.

Read more…
Source: Fortinet


Sign up for our Newsletter
The latest news and insights delivered right to your inbox.


Related:

  • Android/SpyNote Moves to Crypto Currencies

    February 15, 2024

    Like much Android malware today, this malware abuses the Accessibility API. This API is used to automatically perform UI actions. For example, the malicious sample uses the Accessibility API to record device unlocking gestures. Newer, this SpyNote sample uses the Accessibility API to target famous crypto wallets. Read more… Source: Fortinet  

  • Riding Dragons: capa Harnesses Ghidra

    February 14, 2024

    capa is the FLARE team’s open source tool that detects capabilities in executable files. Ghidra is an open source software reverse engineering framework created and maintained by the National Security Agency Research Directorate. With the release of capa v7, Mandian researchers have integrated capa with Ghidra, bringing capa’s detection capabilities directly to Ghidra’s user interface. With ...

  • TicTacToe Dropper

    February 14, 2024

    While analyzing malware samples collected from several victims, the FortiGuard team identified a grouping of malware droppers used to deliver various final-stage payloads throughout 2023. Malware droppers are malicious software designed to deliver and execute additional malware on a victim system and are employed to obfuscate final payloads during load and initial execution. Droppers within this ...

  • Python Info-stealer Distributed by Malicious Excel Document

    February 5, 2024

    In January 2024, FortiGuard Labs obtained an Excel document distributing an info-stealer. From the fingerprints in this attack, it is related to a Vietnamese-based group that was first reported on in August 2023 and again in September. The attack stages before the info-stealer are simple downloaders that increase the difficulty of detection. This article introduces each stage ...

  • Another Phobos Ransomware Variant Launches Attack – FAUST

    January 25, 2024

    The Phobos ransomware family is a notorious group of malicious software designed to encrypt files on a victim’s computer. It emerged in 2019 and has since been involved in numerous cyber attacks. This ransomware typically appends encrypted files with a unique extension and demands a ransom payment in cryptocurrency for the decryption key. FortiGuard Labs has ...

  • Mexican Banks and Cryptocurrency Platforms Targeted With AllaKore RAT

    January 24, 2024

    A financially motivated threat actor is targeting Mexican banks and cryptocurrency trading entities with custom packaged installers delivering a modified version of AllaKore RAT – an open-source remote access tool. Lures use Mexican Social Security Institute (IMSS) naming schemas and links to legitimate, benign documents during the installation process. The AllaKore RAT payload is heavily modified ...