Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 e77ae3c1018fc5d0…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: a3f79a7ed229d75cf391bbbde119dc31 SHA-1: c346914d99d9bdc6c9e23453589b0e406e82b5ec SHA-256: e77ae3c1018fc5d09337a0d54d7fbaf651862e301ac88e47d1a390cd7309636c
160 Risk Score

Malware Insights

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

The file contains VBA macros that reference PowerShell and cmd.exe, indicating an attempt to execute commands. The presence of a GetObject call further suggests dynamic execution or payload retrieval. The obfuscated nature of the VBA code and the use of these execution methods point towards a downloader or dropper functionality, though the specific payload and destination are not directly discernible 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
dc134c8d81974dac0363ff7124d4992e4768cdcb0279b414435ac74d8656a558		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
a61cc6123abbd09bdf3a6c43a35e83c74fab131b3ca47022338604c82b5cb721		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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