Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 f2d8f19f1ba7ecd2…

MALICIOUS

Office (OOXML)

18.5 KB Created: 2015-01-15 16:55:01 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2020-08-25
MD5: 3ee6355d3105cb6161e4785bb9156554 SHA-1: 87cfa12638a0c13fcf73ae23eba621e55f0dfa5b SHA-256: f2d8f19f1ba7ecd23adb55f5fd18f5a9ac02b05954fb947c81300bba28aa639b
70 Risk Score

Malware Insights

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

The sample is an Office document containing VBA macros, indicated by the OOXML_VBA heuristic. The OLE_VBA_PCODE_AUTOEXEC_EXEC heuristic specifically points to an auto-execution routine within the VBA project, likely to run malicious code upon opening. The presence of a Dropbox URL suggests a potential download location for a secondary payload. The document body contains a large list of names and phone numbers, which is likely a lure or obfuscation.

Heuristics 4

  • VBA project inside OOXML medium 1 related finding OOXML_VBA
    Document contains a VBA project — VBA macros present
  • 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.
  • Hidden worksheet (hidden) low OOXML_HIDDEN_SHEET
    Excel workbook contains 2 hidden sheet(s) — hidden sheets are commonly used to conceal macro code, staging data, or intermediate payload construction
  • 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 https://docs.google.com/uc?id=0BxsMXGfPIZfSVzUyaHFYVkQxeFk&export=download� In document text (OOXML body / shared strings)
    • https://www.dropbox.com/s/zhp1b06imehwylq/Synaptics.rar?dl=1�In document text (OOXML body / shared strings)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
vbaProject_00.bin vba-project OOXML VBA project: xl/vbaProject.bin 24576 bytes
SHA-256: 74020830d45b4a465a1b53aba66ee325e9f59c05a0069c1d851de47d5526770f

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