Office (OLE) malware analysis — malicious · 3efa7fdc4ca6834b

MALICIOUS

Office (OLE)

153.0 KB Created: 2020-09-14 22:09:00 Authoring application: Microsoft Office Word

MD5: 58cc2c5ebed512824f2aa59acb33af21 SHA-1: 487cc650e464d8bab23600e0f6a418bd5bbac1f7 SHA-256: 3efa7fdc4ca6834bb9660796ff8e44d4920b31e3cba358915cfc879f08cadbec

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is identified as malicious by ClamAV and contains VBA macros. The 'Document_Open' macro is present, which is a common auto-execution technique. Heuristics indicate a CreateObject call and VBA p-code auto-execution with execution tokens, suggesting the macro attempts to run external code. The presence of 'macros.bas' further supports this. The reconstructed script content indicates it attempts to construct a command involving 'wscript.shell' and 'new' objects, likely to download and execute a payload.

Heuristics 7

ClamAV: Doc.Malware.Generic-9760527-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Generic-9760527-0
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.
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` `bf2dc6e4793502154f28a14458af4f5198ccc48932a5641a4c34f7f1fcdc0c82`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18582 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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