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

Static analysis result for SHA-256 c2140753abe2aa32…

MALICIOUS

Office (OLE) / .DOCX

269.0 KB Created: 2021-08-02 21:58:00 Authoring application: Microsoft Office Word
MD5: 8e57f0d1c879f23a5c4c9bfb7c72130e SHA-1: 64c5a15683e760533e31960b1b311fb344d04f02 SHA-256: c2140753abe2aa32e3cc6e584262d9c1b0023924a7931598159e8f8876c93372
550 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File T1105 Ingress Tool Transfer

The sample contains VBA macros that execute upon opening the document. These macros utilize WScript.Shell and PowerShell to check for specific domain names within the system's network configuration. If a match is found, the script proceeds to execute a download function, which likely fetches and runs a secondary payload from the URL 'https://advancementpass.com/downloads/flankspeed'. The presence of AutoOpen and Document_Open macros, along with Shell() and CreateObject calls, strongly indicates a downloader or droppper functionality.

Heuristics 14

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • PowerShell reference in VBA critical OLE_VBA_PS
    PowerShell reference in VBA
  • ClamAV: Doc.Downloader.Pwshell-10001336-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Pwshell-10001336-0
  • Reference to PowerShell high SC_STR_POWERSHELL
    Reference to PowerShell
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject 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.
  • 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
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • 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://advancementpass.com/downloads/flankspeed
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
4193ab449d67a7a9b92861e210e394332c90afe072ee43a9abd11750cea84b9d		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2903 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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