Office (OLE) / .DOC malware analysis — malicious · eb7cabca916e8bf7

MALICIOUS

Office (OLE) / .DOC

73.0 KB Created: 2022-10-12 00:05:00 Authoring application: Microsoft Office Word First seen: 2022-10-12

MD5: b9fa8f1bf3cfb74acc2c5f58b67058b8 SHA-1: 79d42f688c7ff089585c07994bd6396d948602cb SHA-256: eb7cabca916e8bf7e7cfc0bae4d7569987a6516796dd7f6f9e6fe93c519dad62

262 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment

The sample is a malicious Office document containing VBA macros. The presence of AutoOpen and Auto_Open subroutines, along with a critical Shell() call, indicates that the macros are designed to execute arbitrary code. The ClamAV detection of 'Xls.Malware.Valyria-10029786-0' further confirms its malicious nature. The VBA script likely downloads and executes a second-stage payload, although the specific details are obfuscated.

Heuristics 7

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
ClamAV: Xls.Malware.Valyria-10029786-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Malware.Valyria-10029786-0
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
Auto_Open macro high OLE_VBA_AUTO

Auto_Open macro
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `aac212528399a295453750ea769c72d03c16f61d900449e1d3ef7a2883322fd5`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	21181 bytes

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