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

Static analysis result for SHA-256 28a94c5a811c85ad…

MALICIOUS

Office (OLE) / .PPT

66.5 KB Created: 2021-11-08 01:51:40 Authoring application: Microsoft Office PowerPoint
MD5: a6ff8ce8fa5acae75afd03f2472e421e SHA-1: d7da37d985dcc2bcc07b4ed33e319540a07da40a SHA-256: 28a94c5a811c85ad4a30d234522b538dca5cd3ab370cd63401ca00318055343e
242 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. The Auto_close macro triggers the execution of mshta.exe via a Shell() call, passing an embedded URL. This indicates the likely intent to download and execute a second-stage payload from the specified URL. The URL itself was flagged as confirmed benign, but the execution pattern is highly suspicious.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 http://www.google.com
    • http://www.bitly.com/dghkasdghjkasbdskajb

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
45ceb4296d9795e5c539ec0f0b2667896d61dc130b936219e6ed43fc2442e696		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 959 bytes

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