Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 0ea181801aebe13e…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 576a4cad3f1a4cf3c23a4e0607403680 SHA-1: 8398b640a6d1fdbfe00ba3df6a267daa964c4f60 SHA-256: 0ea181801aebe13e193658602fe673fe0b2a4de971b619e5db008e9093fa879a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic T1059.003 Windows Command Shell

The OOXML document contains VBA macros that reference PowerShell and cmd.exe. The GetObject call is also suspicious. The VBA code appears to be obfuscated, but the presence of these indicators suggests the macro is designed to download and execute a second-stage payload. The specific family is not identifiable from the provided evidence.

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
a7586c6b20e50943d2b461f53ffef8bedac484d210e16f4e7c5c8288a82763c0		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
9f8525eb96fff23edc8d874c225f036d44dfe429e29c0433b9d9f54903910cd7		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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