Malicious MS Excel Document analysis – e0f643792852

The file e0f6437928527aae837ef14f81b048ff is a MS Excel Document for which Malva.RE's static analysis did not establish a malicious verdict. Static analysis extracted 33 embedded or derived files. It matches 8 YARA rules. The file was analysed statically: it was parsed and decompiled, never executed.

SHA256: —
MD5: -
Verdict: Malicious
File type: MS Excel Document

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File

Type

Microsoft Office Document

8 malicious · 34 files

XLSe0f6437928527aae837ef14f81b048ff

XML[Content_Types].xml

BIN_rels

BINxl

BIN_rels

XMLworkbook.xml

BINtheme

BINdrawings

BINworksheets

XMLstyles.xml

OFFvbaProject.bin

BINRoot Entry

BINPROJECT

BINPROJECTwm

BINVBA

BINdir

BIN__SRP_0

BIN__SRP_1

BIN__SRP_2

BIN__SRP_3

VBAThisWorkbook

VBS[Stored VBA]

VBA[PCode]

VBS[Decompiled VBA]

VBS[Full Diff]

VBS[Partial Diff]

BIN_VBA_PROJECT

BINmedia

BINdocProps

	Module Name0
	ThisWorkbook	VBA Stomping ATT&CK T1564.007 Malicious Malicious Document Blacklist VBA VBA Macro
PCode Decompiled VBA Stored VBA Partial Diff. Full Diff. Missing P-Code: The Office document under analysis has been identified as having undergone VBA Purging techniques, as the P-Code block within the document is currently inaccessible. As a result, the decompilation of the code was not possible, leaving only the stored code available in textual format for analysis. VBA Purging essentially involves the elimination of the PerformanceCache section from the module streams. To fully erase any traces of the P-Code section, the MODULEOFFSET between the two sections is adjusted to 0 by altering the _VBA_PROJECT stream, and all SRP streams that also house PerformanceCache data are removed. Following the removal of the compiled code, antivirus engines and Yara rules, which depend on precise string matches, are rendered ineffective. This allows macros to bypass them effortlessly, owing to the compressed format of the remaining source code.

Overview

Summary by MalvaGPT

Characteristics

File Structure

File Structure