Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 784662f1fa2da6d6…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: bb0e3052629009363477c8fd04a9c41b SHA-1: 993ca515203ed775caeed919fd8bd7d9c32aabac SHA-256: 784662f1fa2da6d62aa2a128c419b0ebeb1caa2a8224edf857bbc959697bae96
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The Excel document contains VBA macros that reference PowerShell and cmd.exe. The GetObject call is also a suspicious indicator. These elements suggest the macro is designed to download and execute a second-stage payload, likely via PowerShell. 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
53cb72627bd2d780438f9df8f7683e6667683aa1d2a4b34ab567656637e7b849		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
052d2eb619d4121e2f654039d094c39f72ea127bd2477d774a682a6b0601f72e		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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