Office (OLE) / .DOC malware analysis — malicious · e31831987f89c535

MALICIOUS

Office (OLE) / .DOC

143.4 KB Created: 2019-03-20 08:30:00 Authoring application: Microsoft Office Word

MD5: a959f80767ad1c97e17cd4d654c14447 SHA-1: dc94f9c6ed145ebf0e3388078e5fbbeb38ebd275 SHA-256: e31831987f89c53560484983b15135546a7afe56a50a1f498d936d07f905ad95

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a malicious OLE document containing VBA macros, specifically triggering an AutoOpen macro. The presence of GetObject calls and p-code execution with auto-execution tokens indicates the macro is designed to run automatically and likely execute further malicious actions. The ClamAV detection confirms its malicious nature. The primary IOC is the extracted VBA macro file, 'macros.bas', which is responsible for the malicious execution.

Heuristics 7

ClamAV: Doc.Malware.Sagent-6902288-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Sagent-6902288-0
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen 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` `5a83294798c363bc70fe7f5bc8640e6dd1c6b04896148b0cdc23bd8de9609231`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	14633 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 Chr/ChrW string-construction calls.

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