Office (OLE) / .DOC malware analysis — malicious · 45e7aff44cd668ed

MALICIOUS

Office (OLE) / .DOC

246.5 KB Created: 2020-01-16 15:19:00 Authoring application: Microsoft Office Word

MD5: 3530e8d04f11f2e97997005a21b16b7c SHA-1: 6702abd4e63c22893e4a6e8d6267d56011955db1 SHA-256: 45e7aff44cd668ed1bf0ca7114116fbf489fb9f9786f88e09ab24d6a131f792e

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample is a Microsoft Office document containing a VBA macro that is automatically executed upon opening, as indicated by the 'Document_Open' macro and 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristic firings. The 'GetObject' call within the macro suggests an attempt to load and execute external code. The ClamAV detection and the presence of a 'macros.bas' file further confirm its malicious nature as a downloader. The document body is heavily obfuscated and does not provide clear user-facing content, reinforcing the focus on the macro's execution.

Heuristics 7

ClamAV: Doc.Downloader.Generic-7542953-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-7542953-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
GetObject call high OLE_VBA_GETOBJ

GetObject 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` `8a86308c7488d3a3487edcd188bd5f3ab1c438cbbd70d0fd2c22e27b6bfccfe3`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	11375 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 33 Chr/ChrW string-construction calls.

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