Office (OLE) / .DOCX malware analysis — malicious · 0dcf5051405a8df1

MALICIOUS

Office (OLE) / .DOCX

178.5 KB Created: 2020-10-22 15:17:00 Authoring application: Microsoft Office Word

MD5: f555dfd523fe059fc8b949031b331741 SHA-1: d205e4fb3969ecc5beb79f2521918c6745db5d73 SHA-256: 0dcf5051405a8df1087b5cf36dc02c73c8625397dd38bbee394b11858055e85b

202 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The sample is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that uses CreateObject to execute code. ClamAV identifies it as a downloader. The VBA script appears to be obfuscated but contains string concatenation that reconstructs parts of a URL, suggesting it downloads and executes a second-stage payload. The presence of macros and the downloader behavior strongly indicate a spearphishing attachment used to deliver malware.

Heuristics 6

ClamAV: Doc.Downloader.Logan-9781905-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Logan-9781905-0
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.
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` `cecccb4a1113767f9883636c8aa1a2de57ced4949da2d8bcaf50534e5e598b34`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18857 bytes

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