Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 031a758f5830bfb5…

MALICIOUS

Office (OLE)

48.5 KB Created: 2008-08-12 10:57:00 Authoring application: Microsoft Word 11.3.5
MD5: 61a349e9599f6609f1d7c9b1a15d4da1 SHA-1: fa649e8340f2b1de3360ea6b598c552fa6644a7b SHA-256: 031a758f5830bfb5adf4bf382e787e01ff9d08b11d281a9fda99f66310a08327
180 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV with the signature 'Doc.Trojan.Thus-10'. It contains VBA macros, including a 'Document_Open' macro, which is a common technique for executing malicious code when the document is opened. The macro attempts to copy itself to the Normal template and other open documents, indicating a self-propagation or persistence mechanism.

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
92d0fa20925437be855228570a2aee5857b549baa6f864914dbb8b0b4fb228f1		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2270 bytes
Detection
ClamAV: Doc.Trojan.Thus-10
Obfuscation or payload: unlikely

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