Office (OLE) / .DOC malware analysis — malicious · 40f76fac23b77e57

MALICIOUS

Office (OLE) / .DOC

199.7 KB Created: 2020-09-21 06:43:00 Authoring application: Microsoft Office Word

MD5: 1df2fbce162d6d5abc6d0c3e97b92a76 SHA-1: a8b538c1a0f5ba51c4a08ea894da8e2fd5bc0a59 SHA-256: 40f76fac23b77e57300dcdb6ce0372e1b422428cb9def3594caa35d887ec8bb8

280 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a Microsoft Word document containing VBA macros. Heuristics indicate the presence of a Document_Open macro that uses CreateObject and GetObject, suggesting it attempts to execute code upon opening. The ClamAV detection as 'Doc.Downloader.Generic' further supports this. The embedded artifact 'macros.bas' is likely the source of this malicious behavior, which is typical for a downloader malware.

Heuristics 8

ClamAV: Doc.Downloader.Generic-9764468-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9764468-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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` `7169cbbf5de322d778ca9a77dc58bcf8bb22a6f6d4bfec64dbfa06bc63509b99`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	19229 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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