Office (OLE) / .DOCX malware analysis — malicious · 279d2ffef26dd65f

MALICIOUS

Office (OLE) / .DOCX

162.2 KB Created: 2020-09-17 22:23:00 Authoring application: Microsoft Office Word

MD5: c958666a0d99ffda40903d173b43563b SHA-1: 3c48c5ba7767f4e6e295a03223957e742ff98ef7 SHA-256: 279d2ffef26dd65fe6e5f9340f1f68b1ee8613a2b580b94cd1817d0f236502da

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1059.001 PowerShell

The sample is a malicious Office document containing VBA macros. The 'Document_Open' macro is configured to execute automatically, utilizing 'CreateObject' to initiate malicious actions. This behavior is consistent with a downloader, aiming to fetch and execute a second-stage payload. The ClamAV detection further confirms its malicious nature.

Heuristics 7

ClamAV: Doc.Downloader.Generic-9763113-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9763113-0
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` `98a29bdf4abf669a96318f520c9bfe3aa10e950f57f7c585bdcdcff6e6ad90b2`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	21952 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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