Office (OLE) / .DOC malware analysis — malicious · ffc835c9a950beda

MALICIOUS

Office (OLE) / .DOC

33.5 KB Created: 2020-06-22 06:01:00 Authoring application: Microsoft Office Word

MD5: 14bb45bc44bccbce3f8bffa30b27f40c SHA-1: ba321a4b63a1a548d10cbef0b27363c04a2548ff SHA-256: ffc835c9a950beda17fa79dd0acf28d1df3835232877b5fdd512b3df2ffb2431

340 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file is a malicious Office document containing VBA macros, as indicated by multiple high and critical heuristic firings including OLE_VBA_MACROS, OLE_VBA_AUTOOPEN, and OLE_VBA_SHELL. The presence of an AutoOpen macro suggests that the malicious code executes automatically when the document is opened. The ClamAV detection 'Doc.Downloader.Generic-6698421-0' further confirms its malicious nature, pointing towards a downloader functionality. No specific family could be identified, but the techniques used are common for initial access and payload delivery.

Heuristics 9

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
ClamAV: Doc.Downloader.Generic-6698421-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-6698421-0
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
Auto_Open macro high OLE_VBA_AUTO

Auto_Open macro
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` `3bb0a4ba7a5c43551cf699f7f2bcf59522f1468805a921905dda442230b7160b`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	3642 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 186 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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