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

Static analysis result for SHA-256 dbda469366b6e3cb…

MALICIOUS

Office (OLE) / .DOC

192.5 KB Created: 2021-02-06 14:57:00 Authoring application: Microsoft Office Word
MD5: a5d32228d9cb1b2815b4df718e1253b6 SHA-1: 2b28e4f680a8ee2a62d451630902e299aeb27763 SHA-256: dbda469366b6e3cbc6903493703dea6bc9fed9b40d4437d4b967da00c837d15d
300 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The sample contains VBA macros, including a Document_Open auto-execution macro that utilizes Shell() and CreateObject() calls. The critical heuristic 'OLE_VBA_OBFUSCATED_SHELL_URL' indicates an obfuscated shell command containing a URL, strongly suggesting the macro's purpose is to download and execute a second-stage payload. The presence of an embedded URL in the document text further supports this. While the specific family is not identifiable, the delivery mechanism is clear.

Heuristics 8

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Obfuscated VBA Shell command with URL critical OLE_VBA_OBFUSCATED_SHELL_URL
    VBA macro invokes Shell with command text assembled through decoder or string-manipulation functions and includes a URL. This is a high-confidence downloader/dropper pattern, stronger than Shell or URL evidence on their own.
  • 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
    • https://www.google.com/
    • https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_92x30dp.png
    • https://www.google.com/imghp?hl=en
    • https://images.google.com/imghp?hl=en&gl=ar&gws_rd=ssl
    • http://cec.asso.ac-amiens.fr//images/lcibbrryy.png

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
5e5d2a18eed20d27df3c16a153d541aea717e978a2ec438fd97bf982a7326f5e		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2458 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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