Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 bd6d6c2be8c3586b…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: d18f825c9fee2141c0b7753990aac74f SHA-1: 6007fb5159fb168a499ef14a602c98fea357b37d SHA-256: bd6d6c2be8c3586b2593e1391dc025218213ac5e1fda7476fb96b74915c9867f
160 Risk Score

Malware Insights

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

The OOXML document contains VBA macros that reference PowerShell and cmd.exe. The GetObject call and the presence of a VBA project suggest an attempt to execute malicious code. The VBA macro code itself appears to be heavily obfuscated, but its structure and the heuristic firings indicate it is designed 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
e8727cf7ab2078a5ad6d041e847190784f99fb63f8b44612701f808db55677ea		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
3aa0cb5fccd114fe925041dfecd84a821d1b6982015c16312ab8e2dcf36a10c2		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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