Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 523e71c72ed356c9…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: ddae5ca050d12434ba29e553313305b6 SHA-1: 476aa31d999e649a3fe81cdc3b140e6a13397462 SHA-256: 523e71c72ed356c95f11813b18191cc31d743e9bb00310977dabb094864e3e62
160 Risk Score

Malware Insights

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

The Excel document contains VBA macros that reference cmd.exe and PowerShell. The GetObject call and the presence of VBA macros suggest an attempt to execute arbitrary code. The macros appear to be obfuscated, but the intent is likely to download and execute a secondary payload. The specific family is not identifiable from the provided evidence.

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
b4b337c8e1af2e8e3423ad1e0890d666beaec3267e916bf0c291dc93a775c2c2		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
27b88ce33c77cc99bcc5622ea296a21d9f67d5dd07db36bb14a13a74e6fcb494		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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