Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 88bbec4f048014a0…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: cb3b771f2d1aa48f160fb6363689fc60 SHA-1: c11affef180159a3f1715870d8247d50a0a93fed SHA-256: 88bbec4f048014a0e3bcff375e6b2d13ef40e47b9e1f30d265b0ee38cf1c4f5d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1566.001 Spearphishing Attachment

The critical heuristic 'OLE_VBA_PS' indicates a PowerShell reference within the VBA macros. Additionally, 'OLE_VBA_CMD' and 'OLE_VBA_GETOBJ' suggest the macros are designed to execute external commands and potentially load objects. The presence of VBA macros and the use of PowerShell strongly suggest a malicious document intended to download and execute a secondary payload, consistent with a spearphishing attachment attack.

Heuristics 4

  • PowerShell reference in VBA critical OLE_VBA_PS
    PowerShell reference in VBA
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • cmd.exe reference in VBA high OLE_VBA_CMD
    cmd.exe reference in VBA
  • VBA project inside OOXML medium OOXML_VBA
    Document contains a VBA project — VBA macros present

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
a203e693e4954b6f0077f13676c3d48f8c3adaa914c5cd7bc9791f0f0e5ce2d9		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
a9ccf842b2ca21b4bf99c0db813747286a2f6e58d13817e6470bd3faa1552480		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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