Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 2481ba838fa6e082…

MALICIOUS

Office (OOXML)

41.7 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 9021f694b788e119e2610cf498f2e572 SHA-1: 69e3ac7b3f37fea4d12da298f2205c419f13f682 SHA-256: 2481ba838fa6e08237881f8631d6d26a7951a5ca6076528f8ca9b38cde736ea0
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 these commands suggest the macro is designed to execute arbitrary code, likely downloading and running a secondary payload. The Base64 decoding function indicates obfuscation is used to hide the malicious payload.

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
c79242206391e7c7e853d67c5519c380822b508b74e7d38ae56962a96890b0c2		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
2e72e0c20aad2b07a0f3308c0f2558602570854ec07168cb4ec350d429f01287		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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