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

Static analysis result for SHA-256 fcecc2062f817d0b…

MALICIOUS

Office (OLE) / .PPT

79.0 KB Created: 2022-01-20 11:50:15 Authoring application: Microsoft Office PowerPoint
MD5: 9b4f4fd8cd252b630d54edb6412f0a6b SHA-1: d7a13f6ea259f95d7f07e6b59190d7ac83661043 SHA-256: fcecc2062f817d0be6641716e6e17101bb1564c77c9afc12f975ab449ba52693
200 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file contains VBA macros, specifically an Auto_Close macro, which is designed to execute code upon closing the presentation. The critical OLE_VBA_SHELL heuristic indicates a Shell() call within the VBA code. The script reconstructs a call to 'Shell janwar', which is a function that appears to concatenate strings to form a command, likely to download and execute a secondary payload. The presence of Auto_Close and Shell() calls strongly suggests a malicious intent to run external code.

Heuristics 5

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Reference to ShellExecute API high SC_STR_SHELLEXEC
    Reference to ShellExecute API
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close macro
  • 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
bc14dae9c2f1460cbb92b2f4efe17c1ac1252043b13f27840b192ba2d7cef28b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1872 bytes

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