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

Static analysis result for SHA-256 ae3dec23916f026d…

MALICIOUS

Office (OLE) / .PPT

62.5 KB Created: 2021-03-14 23:15:17 Authoring application: Microsoft Office PowerPoint
MD5: 32c22734a2d3e6720995e40a68367f84 SHA-1: deab0bab214c0a751771e690a35d6c6947de6866 SHA-256: ae3dec23916f026d64c09fb20b7d77c9da20237de820f6d393984f46594a9e78
240 Risk Score

Malware Insights

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

The sample is a PowerPoint file containing VBA macros. A critical heuristic firing indicates the use of the Shell() function within an Auto_Close macro, which is designed to execute automatically when the document is closed. This macro likely leverages mshta.exe, as indicated by a high-severity heuristic, to download and execute a secondary payload. The presence of the Auto_Close macro and the Shell() call strongly suggests a downloader or droppper functionality.

Heuristics 7

  • 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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://%6786d78asd6786d78asd%6786d78asd%6786d78asd@j.mp/dmadwmwdiwdmddwnudnwdxxuwddd

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
0bb1f3ee1d9c7da3f7a7415d322dad6ef90b72bfa50999b142f630e7be3c843f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 486 bytes

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