Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 1eff0a9d37386df2…

MALICIOUS

Office (OLE) / .DOC

156.6 KB Created: 2020-09-17 14:55:00 Authoring application: Microsoft Office Word
MD5: 566c0d1984786cf8531eb19a7155de68 SHA-1: 30dafd5b7a936ff741dd6c278cfb5b2057b3e524 SHA-256: 1eff0a9d37386df2a44523ed75969c9d784c18f8a2cb68982124962a218e63ec
240 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that utilizes CreateObject. This combination strongly suggests an attempt to execute code upon opening. The ClamAV detection as 'Doc.Downloader.Generic' further supports the conclusion that this macro is intended to download and execute a second-stage payload. No specific family could be identified, but the technique is common for initial access.

Heuristics 7

  • ClamAV: Doc.Downloader.Generic-9763036-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9763036-0
  • 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.

FilenameKindSourceSize
macros.bas
97ec197218971ae0b9fcbf923885a92d2933b66cc58f741a5aeef561b0dd1aea		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19831 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 20 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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