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

Static analysis result for SHA-256 dbe9adb27d314e86…

MALICIOUS

Office (OLE) / .DOC

4.15 MB Created: 2021-04-30 22:56:00 Authoring application: Microsoft Office Word
MD5: e583546003db5b61b95fff6382d10446 SHA-1: c1da9815ab54fa11e26ae838e4191e9be9d6a03f SHA-256: dbe9adb27d314e866d5f15a4179583753c7153bc95a0c1735e52cf55720ee9c0
110 Risk Score

Malware Insights

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

The sample is a malicious OLE document containing a large VBA macro. The 'Document_Open' macro is present, indicating automatic execution upon opening. Heuristics suggest obfuscation and the presence of a long encoded blob, typical of malware downloaders. No document body text was available for analysis, but the script's likely intent is to download and execute a second-stage payload from one of the embedded URLs.

Heuristics 5

  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • 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
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — context-specific rules above attribute URLs they actually evaluated; this rule lists URLs that were present in the bytes but were not otherwise tied to a specific finding.
    URL http://strokescribe.com/en/ECI.html
    • http://schemas.openxmlformats.org/drawingml/2006/main
    • http://stackoverflow.com/questions/41404226/why-does-this-vba-generated-qr-code-stutter-barcode-vba-macro-only�
    • http://stackoverflow.com/questions/16143331/generating-2d-pdf417-or-qr-barcodes-using-excel-vba/31663859#31663859
    • http://stackoverflow.com/questions/41404226/why-does-this-vba-generated-qr-code-stutter-barcode-vba-macro-only

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
2579323e1af252b5988ba54c41da30d288fb18abf1b35ca0487e445e6b8aa262		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 369830 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 8 long base64-like blob(s). Carved artifact contains 22 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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