Introduction
(NVISIO) In July 2020, NVISO detected a set of malicious Excel documents, also known as “maldocs”, that deliver malware through VBA-activated spreadsheets. While the malicious VBA code and the dropped payloads were something we had seen before, it was the specific way in which the Excel documents themselves were created that caught our attention. The creators of the malicious Excel documents used a technique that allows them to create macro-laden Excel workbooks, without actually using Microsoft Office. As a side effect of this particular way of working, the detection rate for these documents is typically lower than for standard maldocs.
Activities and Tactics
Country of Origin: 🏳️ [“[Unknown]”]
Notable Campaigns
Information pending cataloguing.
Tactics, Techniques, and Procedures (TTPs)
Information pending cataloguing.
Notable Indicators of Compromise (IOCs)
No curated IOCs are currently published for this actor. This section will be updated when stable, attributable indicators are available.
Malware and Tools
- AZORult
- Agent Tesla
- Formbook
- Matiex
- njRAT
- AZORult:
- Agent Tesla:
- Formbook:
- Matiex:
- njRAT:
Attribution and Evidence
Country of Origin: [“[Unknown]”] Additional attribution information pending cataloguing.
References
References pending cataloguing.