Malicious Office (OLE) / .XLS — malware analysis report

Static analysis result for SHA-256 de85d468759111ea…

MALICIOUS

Office (OLE) / .XLS

120.0 KB Created: 2021-11-03 01:10:23 Authoring application: Microsoft Excel
MD5: 891b1f7af731a47b55a70f1d62a0c369 SHA-1: 5764533e6aace75bbd11c0332792bb3c315d6d18 SHA-256: de85d468759111ea2053e503f6260e92c537d3c17c79d46a43b11bd787de5f37
140 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The Workbook_Open macro executes a PowerShell command to download a second-stage executable from 'http://ddl8.data.hu/get/290492/13081325/YConsoleApp117bg.exe' and save it as 'C:\Users\Public\Documents\orstudy.exe'. The macro also creates a batch file 'C:\Users\Public\Documents\god.bat' which contains the PowerShell command, and then executes this batch file. This indicates a downloader functionality.

Heuristics 4

  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
e24a0f1f4b8167f8cf8c0b0b2df9ca1474f5d8984dbdaa3e83ea0f2bc0b47e5e		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1345 bytes

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