Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5e3ba876f8e43c72…

MALICIOUS

Office (OLE)

98.0 KB Created: 2010-02-17 14:57:00 Authoring application: Microsoft Office Word
MD5: 74abe59a8eb5f7b04b29c5ba669aa853 SHA-1: 9fce0458aeee988f8091bda99f406cacd15a2012 SHA-256: 5e3ba876f8e43c72d0352860d6c78bea5a0924815638b3b8452452514db9c0e1
182 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with the signature 'Doc.Trojan.Thus-10'. It contains VBA macros, specifically a 'Document_Open' macro, which is a common technique for executing malicious code upon opening the document. The macro code appears to be designed to evade antivirus detection by manipulating macro settings and potentially copying itself to other documents. Although the document body text is unrelated educational content, the presence of the malicious macro and the ClamAV detection strongly indicate a malicious intent, likely to download and execute a second-stage payload.

Heuristics 5

  • 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
  • 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
fa78ec2d4e30dcebbfb60ac4999cfa0be2d50bd4f7b9a22224258ee898a980a1
vba-macro oletools.olevba.extract_macros (decoded VBA source) 2347 bytes
Detection
ClamAV: Doc.Trojan.Thus-10
Obfuscation or payload: unlikely