Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 73bd53008294f643…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 2c974829bb943f53ddf1368fa1961876 SHA-1: 9a9f0846973af929862986ed3f0fc1e46c90ce11 SHA-256: 73bd53008294f64319a4246ed2bbb82ef7bd1eb69554c2b4153aa43a270fd4b6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File

The OOXML file contains VBA macros that reference cmd.exe and PowerShell. The presence of GetObject calls and the critical OLE_VBA_PS heuristic indicate that the VBA code is likely attempting to execute obfuscated PowerShell commands. This is a common technique for downloading and executing further malicious stages.

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
b7b7c5287fdc794557cbf84c9ba0c902367daed5bce25537e03d0dfcd6302fc2		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
9598ea4006cd64636c396171d3b04d39c9a8b0ddce4783b204efe028aa54eccd		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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