Office (OLE) / .DOC malware analysis — malicious · ccb4e0501b27f9bc

MALICIOUS

Office (OLE) / .DOC

93.1 KB Created: 2020-12-29 14:47:00 Authoring application: Microsoft Office Word

MD5: 73ce8f88a36584914118763ac549e78e SHA-1: f86880ac243829c83c17b78a7980cf083b807d93 SHA-256: ccb4e0501b27f9bceea9fa789964d8ee8bada161b2ef5651deed46ca088a6c58

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment T1140 Deobfuscate or Obfuscate

The sample contains VBA macros, specifically a Document_Open macro that uses CreateObject, indicating an attempt to automatically execute code upon opening. The presence of a 'macros.bas' file and the 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristic further support this. The document body is heavily obfuscated and unreadable, suggesting it's a lure. The primary function appears to be the execution of these macros, likely to download and execute a second-stage payload.

Heuristics 6

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` `2ed55976d9425aa6a002473bb1c71eee8e80dcaff763b47a487ebd8b695e1425`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	8251 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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