Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 cbb9b040773f7320…

MALICIOUS

Office (OLE)

155.5 KB Created: 2010-02-01 14:39:00 Authoring application: Microsoft Word 11.1
MD5: 613e9fc664f7b49dff13ea016999309d SHA-1: 7d20a5dc539d3740331a5a75ed9d1551c1d4725d SHA-256: cbb9b040773f73201e6ce81d394468514dc04a2545d4a15b1d151f34b200be03
180 Risk Score

Malware Insights

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

The file is an OLE document containing VBA macros, specifically a Document_Open macro, which is a common technique for initial execution. ClamAV detected this file as 'Doc.Trojan.Thus-10', indicating a known malicious pattern. The presence of the Document_Open macro suggests the intent is to execute malicious code immediately upon opening the document, likely to download and execute a secondary payload.

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
27740c503ed74176d2dc311994959e983c44b8875e7c5fbf4ad9f28bc804504d		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2251 bytes
Detection
ClamAV: Doc.Trojan.Thus-10
Obfuscation or payload: unlikely

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