Office (OLE) / .DOCX malware analysis — malicious · b5c594f80d5f76a1

MALICIOUS

Office (OLE) / .DOCX

154.9 KB Created: 2020-09-14 19:47:00 Authoring application: Microsoft Office Word

MD5: 8298d7e19ef3bc45f0cff99729a2c5d7 SHA-1: ee4b1f54cb2de2a5d9d95584a3f8e764436b263b SHA-256: b5c594f80d5f76a189ece1257e4d352cd66bbf5e048a214779208e9b9a56e8f9

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The file contains a VBA macro that is automatically executed upon opening, indicated by the 'Document_Open' and 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristics. This macro likely downloads and executes a second-stage payload, as suggested by the 'OLE_VBA_CREATEOBJ' firing and the presence of the 'macros.bas' artifact. The ClamAV detection further confirms its malicious nature. The document body was heavily corrupted and unreadable, preventing a more specific analysis of the lure.

Heuristics 7

ClamAV: Doc.Malware.Generic-9760307-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Generic-9760307-0
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` `0b6180fea2f2eb783f5bda16a3b3f9aadc8aaa21f7b3f16e95bf573cb2bafb66`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18514 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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