Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 516267ad1a4b47c4…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 9f4b0c415d52a5e1f4de17cf63f4a9b8 SHA-1: 03d5cac26bf9f201e5808f67842078369dc0b31c SHA-256: 516267ad1a4b47c4d96eea161a775dd3cda193306727d5fd6b881f820c46d485
160 Risk Score

Malware Insights

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

The OOXML document contains VBA macros that reference cmd.exe and PowerShell. The GetObject call and the presence of a Base64 decoding function suggest that the macro is designed to download and execute a secondary payload. The specific obfuscation and lack of clear URLs prevent a more precise family attribution.

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
bb0bd76df383fe83a963822e492471a8069dea685737be98738ab4236ffc7816		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
e6d5b4ec1883f83f6127dacae9afcf9fe089b36c6a91e050f1cefecbd3f130c7		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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