Office (OLE) / .DOC malware analysis — malicious · b86aa2863a808be4

MALICIOUS

Office (OLE) / .DOC

162.3 KB Created: 2020-09-23 21:50:00 Authoring application: Microsoft Office Word

MD5: 94ffa7f26bef3abd71ea5ffc7f58277f SHA-1: 41b98ddf611321f69592ae53cde5aa48f55b34a8 SHA-256: b86aa2863a808be4474b2ee7285bb8642b67c9706f68b81925ae69c824defd8e

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The file contains VBA macros, specifically a Document_Open macro that executes code via CreateObject. This indicates the document is designed to run malicious code upon opening. The ClamAV detection 'Doc.Downloader.Mryv-9765643-0' strongly suggests a downloader functionality. The embedded URL, though benign according to reputation, is listed as an IOC due to its presence in the document. The document body content is heavily obfuscated and does not provide clear user-facing text, making the macro behavior the primary indicator of malicious intent.

Heuristics 7

ClamAV: Doc.Downloader.Mryv-9765643-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Mryv-9765643-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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.
Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
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` `73025ddea320f2b071eb07bf918853ac1d6bc1ed1503c9c9400830c79e2af1db`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	19787 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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