Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 8dc3c9307f3a52f3…

MALICIOUS

Office (OLE)

86.5 KB Created: 1996-12-17 01:32:42 Authoring application: Microsoft Excel First seen: 2012-10-10
MD5: 6fba22d661bb665227a6f8186465bc03 SHA-1: a79d3864e8f3303efb68a5ad604f708f8ca6a2d0 SHA-256: 8dc3c9307f3a52f34663792451437668daed85ed8581ee0d8c4ef2a28634d26a
68 Risk Score

Malware Insights

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

The sample is an Excel file containing an XLM macro sheet with an auto_open execution token, indicating an attempt to automatically run malicious code upon opening. The document body presents a seemingly legitimate request for sales data, likely a lure to encourage macro execution. No specific malware family is identifiable from the provided evidence.

Heuristics 3

  • VBA project contains no executable statements low 1 related finding OLE_VBA_MACROS
    Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.
  • 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.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 900 bytes
SHA-256: 8acdb8dc834ddee2d36ddc2aa6de4510d3b545b2d6a1ebd31c70b77e83fcf0f6
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Sheet1"
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 = "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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