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

Static analysis result for SHA-256 bec363d5a759e41f…

MALICIOUS

Office (OLE) / .PPT

74.5 KB Created: 2022-06-13 21:34:52 Authoring application: Microsoft Office PowerPoint First seen: 2022-06-14
MD5: 6c7880e9ddf6ebefb741a0ec1da3bde0 SHA-1: 4a0ab6dd7beffceb026926d438ed50c8efa9706a SHA-256: bec363d5a759e41fb33493f6821bb0a3bb009251346e54124caa5d4754a01c8e
200 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1218.005 System Binary Proxy Execution: Mshta

The critical OLE_VBA_SHELL heuristic indicates the presence of a Shell() call within the VBA macros. This is further supported by the SC_STR_MSHTA heuristic, suggesting the use of mshta.exe for execution. The Auto_Close macro is designed to trigger this malicious functionality upon document closure. The script concatenates strings to form a command, which is then executed via Shell(), likely to download and execute a secondary payload.

Heuristics 5

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Reference to mshta.exe high SC_STR_MSHTA
    Reference to mshta.exe
  • 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
d6951e6da0a7a087afa47595346d7a6fc60b572eea8fff0c880d230d299a64d2		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1567 bytes

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