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

Static analysis result for SHA-256 303eb85055eab94a…

MALICIOUS

Office (OLE) / .DOC

82.0 KB Created: 2020-05-20 16:55:00 Authoring application: Microsoft Office Word
MD5: 3edb5d63591796ce203f47769128bf77 SHA-1: c75304ce3214475fc01ec2228433c5ad5bfc8105 SHA-256: 303eb85055eab94aad03a43ea62cb6c04738002849a6d63c3809dc7ec975f1bc
202 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, as indicated by multiple high-severity heuristics including OLE_VBA_MACROS and OLE_VBA_AUTOOPEN. The ClamAV detection 'Doc.Downloader.Mryi-7859265-0' strongly suggests its function as a downloader. The AutoOpen macro is designed to execute automatically upon opening the document, likely initiating the download of a secondary payload.

Heuristics 7

  • ClamAV: Doc.Downloader.Mryi-7859265-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Mryi-7859265-0
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Suspicious extracted artifact info 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.
  • 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
be08d1a757fbdc4ee0b45b9b534c2083dd09225e4d6bbd8d972ba775336b07fe		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20371 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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