Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 d7637d34dffb4446…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: ba5b5096b4df04215916359665b8ca7d SHA-1: 76e585a02225c2365e2e75ca2eed20d79152ab38 SHA-256: d7637d34dffb44469db1b1ba87240d73c0a120fe70662a9c91165a355e943175
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1566.001 Spearphishing Attachment T1204.002 Malicious File

This OOXML document contains VBA macros that reference cmd.exe and PowerShell. The presence of GetObject calls and the critical OLE_VBA_PS heuristic suggest the macros are designed to execute obfuscated commands, likely for downloading and running a secondary payload. The VBA code itself appears to be a Base64 decoder, further supporting the idea of obfuscated malicious content.

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
e15a893cb687d06b5d6aed60b84eda23f6018a4a46411900606cf95f314d3051		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
177d4f1037acd4328ad982cf82c020dbfb62ecef03ae569b1003ff0213bc0d7a		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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