Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 ce656bf63d61d183…

MALICIOUS

Office (OOXML)

41.8 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: e2ac95ce94ae1e66c9e7e8485de3ce0a SHA-1: 2d781b4dc5d05c4a99a367e255f15a4633bd4899 SHA-256: ce656bf63d61d1835ea1d595637f965b6fe413965a40e3b2e61d542102d6c20a
260 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.003 Windows Command Shell

The sample is an Office document containing a Workbook_Open macro that references cmd.exe and PowerShell. The macro utilizes GetObject and WMI to create a new process, indicating an attempt to download and execute a secondary payload. The presence of a Workbook_Open macro and the execution of external commands strongly suggest a malicious intent, likely delivered via spearphishing.

Heuristics 6

  • PowerShell reference in VBA critical OLE_VBA_PS
    PowerShell reference in VBA
  • VBA WMI Win32_Process launcher critical OLE_VBA_WMI_PROCESS_CREATE
    VBA macro builds or references a WMI moniker for Win32_Process and invokes .Create to start a command. This is a high-confidence macro execution chain that often hides the WMI class name through string concatenation or helper functions.
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • 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
b6ec05f00403e97bfa8ab6db35efc3041696c87c7d86c519012693d68d0ca072		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35258 bytes
vbaProject_00.bin
15aeea853c8ef8b12618ba38edcde4285d23a5f574421468fe0e7bbf16943778		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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