Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 4f2223b092a58265…

MALICIOUS

Office (OLE)

173.6 KB Created: 2011-03-17 06:00:37 Authoring application: Microsoft Excel First seen: 2012-07-12
MD5: d65d013edef3805252fa8b44a2a07a40 SHA-1: 5581d92119b000a1fac8e24ec16ead47cedc73ae SHA-256: 4f2223b092a582650762bcc98f121e411a951475eb4cbc94ad2a1d4c47b30d09
102 Risk Score

Heuristics 3

  • Embedded Adobe Flash (SWF) in OLE document critical OFFICE_EMBEDDED_SWF
    Document contains an embedded Adobe Flash (SWF) object. Vulnerabilities such as CVE-2018-4878 and CVE-2018-15982 involved Flash objects embedded in Office files. Adobe Flash has been end-of-life since December 2020.
  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 177,724 bytes but its declared streams total only 61,941 bytes — 115,783 bytes (65%) live in unallocated sector slack. This is the canonical hiding place for pre-macro-era Office exploit payloads (XOR-encoded shellcode reached via a parser pointer-corruption bug in the document structure).
  • VBA project contains no executable statements info OLE_VBA_MACROS
    Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 600 bytes
SHA-256: 8650a898894ef9c2d31622d7bb389044209fd100de666abdded4f3a85a0ceefb
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Sheet2"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Sheet3"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

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