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

Static analysis result for SHA-256 8156ce4621048984…

MALICIOUS

Office (OLE) / .PPT

63.5 KB Created: 2021-04-05 23:08:55 Authoring application: Microsoft Office PowerPoint
MD5: 37272b75ea6f3a07940ba541acb10bc6 SHA-1: 5fbd19b0234034faa3802ed7cd7fed5b6fb2aaeb SHA-256: 8156ce4621048984bce4875898da52376777c2380543fd353de5af5b72c5ebca
260 Risk Score

Malware Insights

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

The sample is a PowerPoint file containing obfuscated VBA macros. The Auto_Close macro is designed to execute a second-stage payload by calling GetObject with a hardcoded CLSID and then executing the reconstructed URL 'https://j.mp/yuiwqncwqgtgvbhjdv'. This indicates a macro-based downloader attempting to fetch and run additional malicious content.

Heuristics 6

  • Dangerous API name reassembled from split string literals critical OLE_VBA_SPLIT_KEYWORD_OBFUSCATION
    VBA concatenates short string literals that reassemble a dangerous API/ProgID/LOLBin name (e.g. Scripting.FileSystemObject, WScript.Shell, powershell, URLDownloadToFile) which appears in no single literal. Splitting an API name across string concatenation is done only to evade keyword scanning.
  • ClamAV: Ppt.Malware.Valyria-10026465-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Ppt.Malware.Valyria-10026465-0
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • 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
5193efe3f82cf5a0c54dd964cdfd8434ce553f64c40a478c3ee22e0edc668881		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 924 bytes

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