Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 060106363494814d…

MALICIOUS

Office (OOXML)

44.4 KB Created: 2021-06-24 04:31:25 UTC Authoring application: Microsoft Excel 16.0300
MD5: 2cc78d26d93badb6c68a2dc45739c0d9 SHA-1: 17b759f3eef0c9c5a7edeb645e6c8853210e3d53 SHA-256: 060106363494814da48982a85e4c66f5d52e84a537dbb4acbc55067301d88679
160 Risk Score

Malware Insights

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

The file is an OOXML document containing VBA macros. Heuristics indicate the VBA code references PowerShell and cmd.exe, and uses GetObject, suggesting it's designed to execute external commands. The presence of a large VBA macro file (`macros.bas`) and a VBA project file (`vbaProject_00.bin`) further supports this. The VBA code itself appears to be obfuscated, but the intent is likely to download and execute 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
42d3d422d2170f2e12920a9b202727e87796086caad365c45c8d164a002c1472		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 29693 bytes
vbaProject_00.bin
51a7465c33590ee458ade2943d61b19f722279deaafdf33b1e7b2c8771a31253		 vba-project OOXML VBA project: xl/vbaProject.bin 10240 bytes

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