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

Static analysis result for SHA-256 3ec9dbc4b62ddeaa…

MALICIOUS

Office (OLE) / .XLS

118.5 KB Created: 2021-04-13 13:37:17 Authoring application: Microsoft Excel
MD5: b4059701fa3d5865e69bd25fded0043c SHA-1: a1f97cc9b12a75bf4a5e7032bcdad61d542f862a SHA-256: 3ec9dbc4b62ddeaa2a2d6524e9393b6a3f62e0f81dd2a9cbf6438072b5adb8e7
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 executes a command to download a second-stage payload from 'http://3.64.251.139/v11/FTL_0013575222060doc.exe' to 'C:\Users\Public\Documents\dinneryour.exe'. It also creates a temporary command file 'C:\Users\Public\Documents\heavyprevent.cmd' which contains the download and execution command. The GetObject call is used to execute the downloaded payload.

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
fe58a68db884679e6f7af915935e0195fc66b823c6ca4d0fb66d24c90952b6a7		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1325 bytes

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