Bytecode Viewer

Interesting tactic by Ratty & Adwind for distribution of JAR appended to signed MSI – CVE-2020-1464

June 28, 2020

Adwind, binwalk, Bytecode Viewer, CVE-2020-1464, file, Glueball, IoCs, JAR, Java, MSI, RAT, Ratty, xxd, Yara, ZIP

This article discusses an interesting tactic actively used by different Java RAT malware authors like Ratty & Adwind to distribute malicious JAR appended to signed MSI files. This technique was discovered by VT Team in Aug 2018[9] but that time it was not used by malware authors to distribute malicious…

Similarity between Qealler/Pyrogenic variants -Part 0x3

February 4, 2020

Bytecode Viewer, Infostealer, Java, Pyrogenic, Qealler

In this last part, we will compare Old Qealler with the new Qealler/Pyrogenic variant. The previous posts Pyrogenic Infostealer static analysis – Part 0x1 & Unpacking Pyrogenic/Qealler using Java agent -Part 0x2 went through the latest Pyrogenic/Qealler [6] statically and dumping the unpacked code using Java agent. CONTENTS Brief Timeline…

Unpacking Pyrogenic/Qealler using Java agent -Part 0x2

January 17, 2020

Bytecode Viewer, Infostealer, Java, Java agent, Pyrogenic, Qealler

We will learn how and when we can use Java agent to quickly unpack the Pyrogenic Infostealer. In the earlier post Pyrogenic Infostealer static analysis – Part 0x1 we statically analysed the Pyrogenic/Qealler Infostealer but this requires more time and effort. We will be using the same sample PaymAdviceVend_LLCRep.jar from…

Qealler Infostealer static analysis – Part 0x1

January 6, 2020

Bytecode Viewer, Infostealer, Java, Pyrogenic, Qealler, T1043, T1503

Qealler is heavily obfuscated Java based Infostealer which is quite active based on ANY.RUN submission. This will be a three part blog series, this post will focus on Qealler/Pyrogenic static analysis, next part 0x2 we learn unpacking using Java agent and in the last part 0x3 we find similarity between…