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

Static analysis result for SHA-256 a405f145ff2577b8…

MALICIOUS

Office (OLE) / .DOC

213.5 KB Created: 2020-09-21 12:09:00 Authoring application: Microsoft Office Word
MD5: 69456ac63b43e73f2640f74e77e06cde SHA-1: 7cce2bfd0f5ef92391c8050e8b81f043052c9a9a SHA-256: a405f145ff2577b8895565e687c785ca8394c66d48784d10ab47652d3f48bafc
280 Risk Score

Malware Insights

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

The file is a malicious Microsoft Office document containing VBA macros. The presence of a 'Document_Open' macro, coupled with 'CreateObject' and 'GetObject' calls, strongly indicates that the macro is designed to execute code upon opening. The ClamAV detection as 'Doc.Downloader.Generic' further supports this, suggesting the macro's primary function is to download and execute a second-stage payload. No specific family could be identified, but the techniques used are common for initial access and payload delivery.

Heuristics 8

  • ClamAV: Doc.Downloader.Generic-9764508-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9764508-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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.
  • 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
cea30dbaa44bcaf57fbcd15c35be69cfffbad74d3b69c3addc059acf5ad797f9
vba-macro oletools.olevba.extract_macros (decoded VBA source) 19026 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.