Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 c6c4655affd09696…

MALICIOUS

Office (OLE)

99.0 KB Created: 1999-10-08 08:45:00 Authoring application: Microsoft Word 8.0
MD5: 4c1513a9ada76657ff978df65f99a450 SHA-1: 91c7848ab3df49a887b245bb587e823f162a32df SHA-256: c6c4655affd0969633a34658aba0686c52d021fd6e4585a42a2cc3f39d17b750
220 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with multiple high-severity heuristics indicating the presence of VBA macros, including AutoOpen and Auto_Close. The document body, disguised as a conference invitation, likely serves as a lure to trick the user into enabling macros. No scripts were extracted, but the presence of AutoOpen suggests an immediate execution upon opening. The ClamAV detections 'Doc.Trojan.Class-37' and 'Doc.Trojan.Class-1' are included as IOCs.

Heuristics 5

  • ClamAV: Doc.Trojan.Class-37 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Class-37
  • 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.
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close 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
238c2d45908a40ab1e4214cdca353ca7dbe15e948b07daa9a677404c9385cd36		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 17865 bytes
Detection
ClamAV: Doc.Trojan.Class-1
Obfuscation or payload: unlikely

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