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

Static analysis result for SHA-256 1bfdd6e98ee401bb…

MALICIOUS

Office (OLE) / .PPT

60.5 KB Created: 2022-06-08 13:40:30 Authoring application: Microsoft Office PowerPoint First seen: 2022-06-09
MD5: ffaec1937be1923c8ce0313524fae5ec SHA-1: 3ddc591e9735b9658fd9eed7171d6dce76f37caa SHA-256: 1bfdd6e98ee401bb988dab6bd8475dd3e314bdd908ca13f5f3285dea3fe438f2
422 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1071.001 Web Protocols

The sample contains a VBA macro with an Auto_Close subroutine that utilizes WScript.Shell to execute a command. This command constructs a string that uses mshta to download and execute a JavaScript file from the URL 'https://bitbucket.org/!api/2.0/snippets/rikimartinplace/rEEAkz/eb1caa2c792a6b46b99e644cd3363d76aa9b4eb7/files/tomfinal'. The script then writes this JavaScript content to 'C:\Users\Public\Pictures\showcase.js' and subsequently executes it using 'explorer.exe'. This indicates a downloader or dropper functionality.

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/rEEAkz/eb1caa2c792a6b46b99e644cd3363d76aa9b4eb7/files/tomfinal

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
845bcf22ffecaf7fe07f22661cdabbf9a3afb28c227b8c9875a8e4b90c060cc1		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 837 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 shell/COM execution token(s).

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