Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 fe5e33c41ff92742…

MALICIOUS

Office (OLE)

49.0 KB Created: 2094-08-24 08:14:00 Authoring application: Microsoft Word 9.0
MD5: 7766ea59ffdfc562793dc874421c3967 SHA-1: 091f48a3e3017f9e012918aa01c115d6f7350e9f SHA-256: fe5e33c41ff92742f6f846031a2e75dca5cf2daf2621c949ca8229536e71beaa
220 Risk Score

Malware Insights

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

The file contains VBA macros, including AutoOpen and Auto_Close functions, which are commonly used to execute malicious code upon document interaction. The presence of ClamAV detections (Doc.Trojan.Class-37 and Doc.Trojan.Class-1) strongly indicates malicious intent. The document body content appears to be a schedule for a conference, which is likely a lure to disguise the malicious nature of the file. No specific IOCs like URLs or hashes were extracted from the macros themselves.

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
a090d17e3fe3a078a1c64c6b9f41c772d07057ab7313149e4617646bd8b5d401		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18385 bytes
Detection
ClamAV: Doc.Trojan.Class-1
Obfuscation or payload: unlikely

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