Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 fe569625b5cf166f…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 85891a9fcdb27ba7a6bb1a56bb4d30f1 SHA-1: 2e6cf6acf50a25b4ec526f43431fc12a3b897472 SHA-256: fe569625b5cf166fe45591cb385e99a0bfe08395f8c9c7501550b0afe5bbe8ef
160 Risk Score

Malware Insights

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

This Office document contains VBA macros that reference PowerShell and cmd.exe, indicating an attempt to execute arbitrary code. The presence of a GetObject call further suggests the potential for object manipulation or execution of external code. The VBA code itself appears to be heavily obfuscated, but its intent is likely to download and execute a second-stage payload.

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
2b5486fc1bc950cb5b1eb0dcb99da799dbcd94c27e789315108664669974bf1e		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
a3f9aef33040cf734ea51d7c39f98c0e1b390fd487097076221aaf93dfaffa7b		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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