Office (OLE) / .DOC malware analysis — malicious · ec337dda5ca6dd67

MALICIOUS

Office (OLE) / .DOC

176.3 KB Created: 2020-09-18 22:05:00 Authoring application: Microsoft Office Word

MD5: 1a5ba86383a2986534212619340fef74 SHA-1: 8c4b378d5d685a206b68617b16094660da557ff6 SHA-256: ec337dda5ca6dd67a96bfb260be5e8f925e3830ce02caeac429cd1eb93066fc1

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a malicious OLE document containing a VBA macro that automatically executes upon opening. The macro is designed to download and execute a secondary payload, as indicated by the 'CreateObject' and 'Document_Open' heuristic firings and the ClamAV detection. The presence of the 'macros.bas' file further supports this. The document body content is heavily corrupted and does not provide further context.

Heuristics 7

ClamAV: Doc.Downloader.Generic-9763712-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9763712-0
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` `f035cd1023dade0b5d5e126cbab797fd9aeb292e781548b39fa794a9356990ee`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	19197 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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