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

Static analysis result for SHA-256 9a9e1263481fee73…

MALICIOUS

Office (OLE) / .PPT

58.0 KB Created: 2022-06-06 09:59:18 Authoring application: Microsoft Office PowerPoint First seen: 2022-06-07
MD5: f0528e8381a02934055e1b41d81b2952 SHA-1: 9c2ebad2700bf726f364dbeb2fd7c794a66b4145 SHA-256: 9a9e1263481fee73e8a63360f8e15c5fdaf84e6ad40dcdb42ba90171e1246035
422 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1218.005 Client Execution

The Auto_Close VBA macro contains a critical Shell() call that uses WScript.Shell to execute mshta.exe with a URL pointing to a script hosted on bitbucket.org. This script is likely designed to download and execute a second-stage payload. The macro also writes the command to a local JavaScript file, which is then executed via explorer.exe.

Heuristics 11

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • LOLBin reference in VBA critical OLE_VBA_LOLBIN
    LOLBin reference in VBA
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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
  • Suspicious extracted artifact medium 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.
  • 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://bitbucket.org/!api/2.0/snippets/rikimartinplace/6EEeM4/83bff5709919e38ef1c3bbcce9758c1ab61406b3/files/divinefinal

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
97868df6a59213ca05a5d9169408f765548b153b0d66c8b5f4352a62f63cb03b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 648 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 shell/COM execution token(s).

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