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

Static analysis result for SHA-256 62e848a4f1804bff…

MALICIOUS

Office (OLE) / .PPT

79.5 KB Created: 2022-01-20 11:50:15 Authoring application: Microsoft Office PowerPoint
MD5: f64fd67b707789bd6c7a52406f3139f8 SHA-1: 0547e2c2f1420e1f8a7bdb5b8fc6c9ec9f70ecb0 SHA-256: 62e848a4f1804bff428ce570397c0e29e2f7752e642a7fe98acfd3af26f2fe29
200 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The PowerPoint file contains VBA macros, including an Auto_Close macro, which is designed to execute arbitrary code. Specifically, the Auto_Close macro calls the `uganda` subroutine, which in turn calls the `Shell` function with the result of the `janwar` function. The `janwar` function appears to construct a string, though its exact purpose is obfuscated. The use of ShellExecute and Shell() calls strongly indicates an attempt to download and execute a secondary payload.

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
bd5265d728330c3e124a817544c4e12e1ab41358604d7c457bed91dce76bd593		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1878 bytes

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