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

Static analysis result for SHA-256 e28c1860e0680297…

MALICIOUS

Office (OLE) / .XLS

120.0 KB Created: 2021-11-03 01:10:23 Authoring application: Microsoft Excel
MD5: b3501c4708aed2dbf245204264bb50c6 SHA-1: 9f15fb3f79388de653cdff6530a94924c29aaf6a SHA-256: e28c1860e068029777457eb2e8cb8f2564e728b645f163bf09dec30bff193fb2
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 execute automatically when the Excel file is opened. It constructs a batch file named 'god.bat' in the public documents directory. This batch file then uses PowerShell to download a second-stage executable from 'http://ddl8.data.hu/get/290492/13081325/YConsoleApp117bg.exe' and saves it as 'projectelse.exe' in the same directory, before executing it. The GetObject calls and VBA p-code execution further indicate malicious intent.

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
885fb2217ab28fccc1b2d148fc54ebcb952a8e18c7920d2a8455beeb3e100a92		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1358 bytes

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