Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 2fd78d5d9333f45b…

MALICIOUS

Office (OLE)

29.0 KB Created: 2003-05-30 00:49:00 Authoring application: Microsoft Word 10.1
MD5: 859e00788fb799243c11e31805254f94 SHA-1: 898e1fa2f3ecdd02c22bc82fa5d2de0d7db29fb3 SHA-256: 2fd78d5d9333f45b1382006c98140f976750997d68d81c562d6739ae616e024d
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1204.002 Malicious File

The file is identified as malicious by ClamAV with the signature Doc.Trojan.Thus-8. It contains VBA macros, specifically a Document_Open macro, which is a common technique for executing malicious code upon opening the document. The document body presents a schedule, likely a lure to trick the user into enabling macros. The primary function of the macro appears to be downloading and executing a secondary payload, although the specific download URL or execution method is not detailed in the provided heuristics.

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.

FilenameKindSourceSize
macros.bas
751424cd5c191d02c834ae869229a0691bef79ca2be445c5356c5487df2955da
vba-macro oletools.olevba.extract_macros (decoded VBA source) 2393 bytes
Detection
ClamAV: Doc.Trojan.Thus-8
Obfuscation or payload: unlikely