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

Static analysis result for SHA-256 32397c143bd1d84c…

MALICIOUS

Office (OLE) / .PPT

58.5 KB Created: 2021-07-13 02:06:37 Authoring application: Microsoft Office PowerPoint
MD5: d728d510f2b3020f9f5966787d11097d SHA-1: fad2d76eacde97742c9147a0b9ce02b1d672b4a5 SHA-256: 32397c143bd1d84c30ddda892b0f2e13f97ab22bfbc266738ffa7f369c97ea81
322 Risk Score

Malware Insights

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

The sample is a PowerPoint presentation containing a VBA macro that executes mshta.exe. The macro constructs a URL by concatenating several strings, including a bitly.com domain, and passes it to mshta.exe. This indicates the likely intent is to download and execute a second-stage payload from the constructed URL. The use of mshta.exe and the Auto_Open macro are common techniques for initial execution.

Heuristics 9

  • LOLBin reference in VBA critical OLE_VBA_LOLBIN
    LOLBin reference in VBA
  • Reference to mshta.exe high SC_STR_MSHTA
    Reference to mshta.exe
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open 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.
  • 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.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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://bitly.com/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
ced0addabdbaacea3dd36bf5fcf1994e00c621aaf1c6927be9d5cacbc3937a3d		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 375 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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