Malware

Authored by: Anandeshwar Unnikrishnan Stage 1: GULoader Shellcode Deployment  In recent GULoader campaigns, we are seeing a rise in NSIS-based installers

Elastic Security Labs observes that the threat behind SIESTAGRAPH has shifted priorities from data theft to persistent access, deploying new malware like NAPLISTENER to evade detection.

We take a deep dive into Roshtyak, the DLL backdoor payload associated with Raspberry Robin. Roshtyak is full of anti-analysis tricks. Some are well-known, and some we have never seen before. From a technical perspective, the lengths Roshtyak takes to protect itself are extremely interesting. Roshtyak belongs to one of the best-protected malware strains we have ever seen. We hope by publishing our research and analysis of the malware and its protection tricks we will help fellow researchers recognize and respond to similar tricks, and harden their analysis environments, making them more resistant to the evasion techniques described.

Mangle is a tool that manipulates aspects of compiled executables (.exe or DLL) to avoid detection from EDRs - GitHub - optiv/Mangle: Mangle is a tool that manipulates aspects of compiled executabl...

This is a repository of resource about Malware techniques - GitHub - fr0gger/Awesome_Malware_Techniques: This is a repository of resource about Malware techniques

A quick guide and high-level discussion on how to remove runtime dependencies when writing malware.

In a time full of ransomware as well as Advanced persistent Thread (APT) incidents the importance of detecting those attacking groups has become increasingly...

EDR / AV Evasion

Contribute to wavestone-cdt/EDRSandblast development by creating an account on GitHub.

Crypter, binder & downloader with native & .NET stub, evasive by design, user friendly UI - GitHub - bytecode77/pe-union: Crypter, binder & downloader with native & ...

Design & Implementation of a crypter in any language, using Xencrypt (Powershell) as an underlying example.

Introduction System calls are the ultimate high-level atomic actions that Malware writers might control. System calls sequences are the defacto ultimate way to divide behaviors between good and bad…

A Pin Tool for tracing API calls etc. Contribute to hasherezade/tiny_tracer development by creating an account on GitHub.

The automatic detection and classification of any given file in a reliable manner is often considered the holy grail of malware analysis. This blog will dive into DotDumper’s usage and internals.

An automatic unpacker and logger for DotNet Framework targeting files - GitHub - advanced-threat-research/DotDumper: An automatic unpacker and logger for DotNet Framework targeting files

A new document royal road v7 installs a backdoor in .NET. a first executable is dropped \os03C2.tmp. This exe has many similarities with…

HelloKitty lacks the stealth of Ryuk, REvil and Conti, but has still struck some notable targets, including CEMIGO. Ransomware overview and IoCs here.

This blog details how Iron Tiger threat actors have updated their toolkit with an updated SysUpdate malware variant that now uses five files in its infection routine instead of the usual three.

Proofpoint researchers identified a new variant of the Buer malware loader distributed via emails masquerading as shipping notices in early April.

In a highly targeted operation by a Chinese APT, a newly discovered backdoor dubbed PortDoor is being used in attacks targeting a Russian defense contractor...

Microsoft has identified three new pieces of malware being used in late-stage activity by NOBELIUM – the actor behind the SolarWinds attacks, SUNBURST, and TEARDROP.

In this report, we present a UEFI firmware rootkit that we called CosmicStrand and attribute to an unknown Chinese-speaking threat actor.

OrBit is a new Linux malware that hijacks the execution flow, evading and gaining persistence to get remote access and steal information.

Learn how the Falcon Complete Team detected the SolarMarker Backdoor using the Falcon UI, our deobfuscation process, and how we collaborated with our Intel team.

In late February, while tracking a malicious spam campaign from the Qakbot distributor “TR,” Binary Defense’s analysts identified a new version of IcedID being delivered through malicious Word and Excel files. The updated IcedID has a new first stage loading mechanism, which we’ve dubbed “gziploader,” along with new encryption algorithms for hiding its configuration and […]