Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 2c48a3eec1ef63f0…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 4820fad6255497854f23c0aec4b72c9b SHA-1: 260e57c3338f5e3d6d00cfada9b65a9b3ed38857 SHA-256: 2c48a3eec1ef63f09d512ece9a3bf223c10c8c7a789a11ca9597036f28b781e2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1059.005 Visual Basic

This Excel document contains VBA macros that reference PowerShell and cmd.exe, indicating an attempt to execute malicious code. The GetObject call further suggests dynamic execution of code. The primary function of the VBA macro appears to be the execution of a PowerShell command, likely for downloading and running a secondary payload, which is a common technique for malware delivery.

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
77983c89b1e52a8f8942197e6ab0623b72fbdbc02a405772440bbbd0d0362bf7		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
40724e1fc245595423e7b8063d171d79e62b4aea1c688a7ba12d988cd6f81133		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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