Office (OLE) / .DOCX malware analysis — malicious · c6dcfa2a31a09422

MALICIOUS

Office (OLE) / .DOCX

172.2 KB Created: 2020-09-17 10:17:00 Authoring application: Microsoft Office Word

MD5: 7ecd349a59cfe2dbe2c6e746c705fbd8 SHA-1: 0c3ccdf29afcd252273f608bf15f72d3a4e1be64 SHA-256: c6dcfa2a31a094225c25a0d53cccd915b76ab34be20b10fc775d740b3e6d9b21

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a malicious Office document containing a large VBA macro. The 'Document_Open' macro is automatically executed upon opening, and the presence of 'CreateObject' calls indicates an attempt to run external code. This is consistent with a downloader or droppper functionality, aiming to fetch and execute further stages of malware. The ClamAV detection 'Doc.Downloader.Generic-9762674-0' further supports this assessment.

Heuristics 7

ClamAV: Doc.Downloader.Generic-9762674-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9762674-0
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` `9ba8ec3966e91d175acafd30ec3438df19c84a3d5c19c35fd5e40d1b639faa28`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	20635 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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