Office (OLE) / .DOCX malware analysis — malicious · 52a0adf142144db1

MALICIOUS

Office (OLE) / .DOCX

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

MD5: 3e88d832df58dc6c54bc369ce0272ee4 SHA-1: 9d351e4120cb6658c6d2b6b5d5d706db47fa2c8b SHA-256: 52a0adf142144db17669aafbd187b88a6623f861d103832f2e44df036d7fb94d

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample contains a Document_Open VBA macro that is automatically executed upon opening the document. This macro utilizes CreateObject, indicating it's designed to perform actions beyond simple document manipulation. The ClamAV detection 'Doc.Downloader.Generic-9762674-0' strongly suggests the macro's purpose is to download and execute a secondary payload. No specific malware family could be confidently identified.

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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