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

Static analysis result for SHA-256 8cef92e42feef5fd…

MALICIOUS

Office (OLE) / .XLS

108.5 KB Created: 2021-10-03 23:25:03 Authoring application: Microsoft Excel
MD5: 75b4410b699b9c26f5519ebee3603ae6 SHA-1: 1e812fde3b9a5e78a755f1c5dd9fc47f766d545c SHA-256: 8cef92e42feef5fd44becf0596e97dd882ac7ff11b387ffd16393ccbd5e523b5
140 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The Workbook_Open macro is designed to create a batch file named 'god.bat' in the public documents directory. This batch file contains a command to download an executable file from 'http://ddl8.data.hu/get/399080/13079325/YConsoleApp113.exe' and save it as 'beginever.exe'. The macro then executes 'beginever.exe'. The GetObject calls and the execution of a batch file indicate a downloader pattern.

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
6502bff0613cc9a52649120c4bbaf9ccdd918744368afe5012b235b17769d0cc		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1387 bytes

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