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Analysis of a DLL Downloader

Summary SHA256: dedb8516befa4a5088000b8c7f699dae7f33761403dd355a14684ac89ff56a9a Filename: Unknown Filetype: DLL File size: 39KB From here on, the above DLL will be referred to as “downloader.dll”. The file is capable of: Downloading files Interacting with a C2 server Malware… 

Info-Stealing Tool Posing As Naver OTP

Summary SHA256: 3275f42c85c9e2fcb80d1f8c1c6227c2bcde9c0e719905ddbd2ca7373c6a8ec6 Filename: UpHelpers.exe Size: 3.41MB Extension: EXE Compilation Timestamp: 2022-01-05 23:41:20 Sandbox analysis: https://tria.ge/220118-emrgjsgfb7 UpHelpers.exe is an information-stealing/reconnaissance tool disguised as a Naver One Time Password, (OTP) generator app. Naver is a South… 

Analysis of njRAT PowerPoint Macros

I wanted to do a quick write-up on an interesting PowerPoint macro document that contains njRAT. njRAT is a .NET trojan first identified in 2013 that has largely targeted countries in the Middle East as… 

A “GULP” of PlugX

Often attributed to Chinese-speaking threat actors, PlugX a remote access trojan(RAT), was identified by security researchers in 2012. With several variants of the RAT identified by vendors over the year, many techniques used to compromise… 

More Flagpro, More Problems

No stranger to this blog, BlackTech has continued to modify techniques to compromise networks and even suffered an OPSEC slip in the way of an open directory. This post will cover a malicious document similar… 

BlackTech Updates Elf-Plead Backdoor

Overview On November 10, 2020, JPCert[1] published a blog post in Japanese (the English version followed about a week later), providing an overview of BlackTech’s PLEAD backdoor, referred to as “ELF_PLEAD”, specifically targeting *nix systems.…