Office (OLE) / .DOCX malware analysis — malicious · 1a1117fee8d79bc4

MALICIOUS

Office (OLE) / .DOCX

153.6 KB Created: 2020-09-22 12:58:00 Authoring application: Microsoft Office Word

MD5: 0ca3db4872b34b272c151799a851b470 SHA-1: 66eece2be93f682edfe9aad35ec76f4fee2a96b2 SHA-256: 1a1117fee8d79bc4f17cd8256e6f5a71a970665243bac9ee7b6a475271cfb524

280 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that is auto-executed. Heuristics indicate the use of CreateObject and GetObject calls, suggesting the macro attempts to instantiate and interact with system objects. The ClamAV detection and static triage further confirm its malicious nature. The document body is heavily corrupted and unreadable, providing no direct clues to the lure, but the presence of auto-executing VBA macros strongly indicates a malicious intent to run arbitrary code.

Heuristics 8

ClamAV: Doc.Malware.Ewtz-9765445-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Ewtz-9765445-0
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` `3534612e311adddbcf2e093d61bfa43aa100b688e0fa70d64062312eb6cd9cc9`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	17155 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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