Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 091fe23094cef523…

MALICIOUS

Office (OLE)

156.6 KB Created: 2020-09-15 06:22:00 Authoring application: Microsoft Office Word
MD5: b8ae18e39b5da03f68a72c09a39b0a4b SHA-1: aafbaf5532b84f88abc3d8a042354f68dbd65979 SHA-256: 091fe23094cef52382e4f02cf80000a125696460a853d355de236602d4e7d697
202 Risk Score

Malware Insights

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

The sample contains VBA macros, including a Document_Open auto-execution macro, which is a common technique for malware delivery. The macro's intent appears to be downloading and executing a second-stage payload, as indicated by the CreateObject heuristic and the structure of the VBA code. The ClamAV detection further confirms its malicious nature.

Heuristics 6

  • ClamAV: Doc.Malware.Ewlu-9762385-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Ewlu-9762385-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
0812334775ad413ac951a2705cc110a8397311927e3a75099eb95d4d59503241		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 23048 bytes

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