Office (OLE) / .DOC malware analysis — malicious · e9ec57f67255818c

MALICIOUS

Office (OLE) / .DOC

337.5 KB Created: 2018-09-18 05:32:00 Authoring application: Microsoft Office Word

MD5: 1a078261caf611aa16ad883596412fb8 SHA-1: 148709989c28481fce50f92eb39bb76b0c45b93e SHA-256: e9ec57f67255818cfb8920558c2571e4427628757a23b8369a9c2784e850b199

280 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The file is a malicious OLE document containing VBA macros, specifically triggering a Document_Open macro that uses CreateObject and CallByName. This indicates an attempt to execute code automatically when the document is opened. The ClamAV detection and heuristic firings strongly suggest this is a downloader for a secondary payload. No specific family could be identified, but the technique is common for initial access.

Heuristics 8

ClamAV: Doc.Malware.Valyria-6691358-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Valyria-6691358-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
CallByName call high OLE_VBA_CALLBYNAME

CallByName 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` `c77a2c6beaa365bb5d76b5ab9c7766259ce8447f9d9f7f70ad0e78fc5c617170`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2347 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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