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

Static analysis result for SHA-256 c8ca14d8fe473b4c…

MALICIOUS

Office (OLE) / .XLS

48.5 KB Created: 2021-04-13 13:37:17 Authoring application: Microsoft Excel
MD5: 19ab88e8e8eb8e6beb9ff78905146165 SHA-1: 612493af5d7f09b840fd1b635d10d2488af2a3c2 SHA-256: c8ca14d8fe473b4c9892eee0a7b2fc9b5bc40ea2f0bbb5e0c1ebd0ac7391f2a3
140 Risk Score

Malware Insights

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

The Workbook_Open macro executes a GetObject call to create a batch file named 'god.bat' in the public documents directory. This batch file is then written to contain a command that downloads a second-stage executable ('hhh.exe') from 'http://18.156.71.237/hN/5/B/hhh.exe' and saves it as 'technologyvarious.exe' in the same directory. Finally, the batch file executes 'technologyvarious.exe'. The GetObject call and the execution of a downloaded payload are strong indicators of 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
e352c08f91515d57678d5d4c0a321f00deb7171badf904662fd5b58d81f3dac3		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1377 bytes

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