Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 4d0c3a07dada8bdb…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: c3349021010207880fff703b2f9acbfe SHA-1: c992e2b6ff1bdb5c1b584d5a30118439ac388621 SHA-256: 4d0c3a07dada8bdb95d93ebbb313cf165c39a29fea409098a298c5a9298df707
160 Risk Score

Malware Insights

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

The OOXML document contains VBA macros that reference PowerShell and cmd.exe, indicating an attempt to execute arbitrary commands. The presence of a GetObject call further suggests the potential for object manipulation or execution of external code. The VBA code itself appears to be obfuscated, likely to hide the download and execution of a second-stage 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
3d734e4604c96ad970ab3a5f67b978d53167da72c31972e9af3a5a1b885e7622		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
e22b2c1e4b31b0e4f467af85d87bea949ccaad857062102101ed08ead53f1a91		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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