Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 b785c744ab7087e7…

MALICIOUS

Office (OLE)

79.0 KB Created: 2008-09-30 08:18:00 Authoring application: Microsoft Word 10.1
MD5: 1bfd308b03ca926a5ae304a4fee2853d SHA-1: 2a4a108afe5fc5bb980cef4ddae60ea5576d4544 SHA-256: b785c744ab7087e7a4c0f6289b96438296ac6c70b42ff7fca2552257a6e206c6
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file is a Microsoft Word document containing malicious VBA macros, specifically a Document_Open macro. The document body presents itself as a rental/credit application, which is a common lure for social engineering attacks. The presence of the Document_Open macro indicates that the malicious code will execute automatically upon opening the document, likely to download and execute a second-stage payload. The ClamAV detection 'Doc.Trojan.Thus-10' further confirms its malicious nature.

Heuristics 4

  • ClamAV: Doc.Trojan.Thus-10 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Thus-10
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
440904611d1f360439fe089ac4fed3fcc85dfc36c492c5a5f719049079e6edac		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2281 bytes
Detection
ClamAV: Doc.Trojan.Thus-10
Obfuscation or payload: unlikely

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