Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 80efe3ca68a09ac3…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 5aa8f9c58a92040a29cb050397cac40d SHA-1: f77fa46614162f74fdede8756de3c73c1e6b5fd0 SHA-256: 80efe3ca68a09ac33cd5446cb747b500363e78a4eeda0c4696117aa3f4417ca4
160 Risk Score

Malware Insights

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

The OOXML file contains VBA macros that reference cmd.exe and PowerShell. The GetObject call and the presence of VBA macros suggest an attempt to execute arbitrary code. The VBA code itself appears to be heavily obfuscated, making it difficult to determine the exact payload, but the references to cmd.exe and PowerShell strongly indicate a downloader or initial execution stage.

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
6b96e840c3ea9415a2414ad2ad2a9308b42245a66b1bef2ab3d7ae6d48a67356		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
4ef6666861e365aa07b5e34e08e47fee371e990100673e10c026de656647134b		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.