Office (OLE) malware analysis — malicious · d33f9cb97d64343b

MALICIOUS

Office (OLE)

128.0 KB Created: 2010-08-31 20:40:00 Authoring application: Microsoft Word 10.1

MD5: 305d81581090a41bcb083e5b85360d8b SHA-1: 685c6109a5f22e29866bb2ed63966ea5c94b607c SHA-256: d33f9cb97d64343b94fc8a60453afd576ad925358261ca523b3c808619b83ff5

180 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-8'. Static analysis detected VBA macros, specifically a 'Document_Open' macro, indicating an attempt to automatically execute code upon opening the document. The document body, while appearing to be informational text about a tattoo convention, is likely a lure to encourage macro execution. The primary attack vector is the execution of embedded VBA macros, which are often used to download and execute further stages of malware.

Heuristics 4

ClamAV: Doc.Trojan.Thus-8 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Thus-8
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.

Filename	Kind	Source	Size
`macros.bas` `95fbfd232b47a4e899d3c9a0b9713dc70b8a3014ab4c673c6fbaf5529421ff3e`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2409 bytes
Detection ClamAV: Doc.Trojan.Thus-8 Obfuscation or payload: unlikely

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