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

Static analysis result for SHA-256 d42cf1aa9737e9ee…

MALICIOUS

Office (OLE) / .PPT

56.0 KB Created: 2023-02-28 19:45:11 Authoring application: Microsoft Office PowerPoint
MD5: 1b8cc3a6caf1f2a797e55661df69e1a5 SHA-1: b644882b78bcaa8d435ed6cd8f3718e70cd33766 SHA-256: d42cf1aa9737e9ee24d49805db194c72d799608174b6335bcb8d7a0798f9ddb3
420 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1218.011 Signed Binary Proxy Execution: Rundll32

The sample is a PowerPoint file containing a VBA macro with an Auto_Open procedure. This macro utilizes WScript.Shell to execute cmd.exe, which in turn is used to download and execute a payload from the URL http://109.248.11.155/network.exe. The presence of WScript.Shell and cmd.exe references, along with the Auto_Open execution, strongly indicates a malicious intent to download and run a secondary stage.

Heuristics 11

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • cmd.exe reference in VBA high OLE_VBA_CMD
    cmd.exe reference in VBA
  • 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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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 http://109.248.11.155/network.exe

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
39cfd496a03373db7e741c406e1afd6307b3ac492e489a75a224e53cef0c85a8		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 229 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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