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

Static analysis result for SHA-256 a9a7e2936d94dede…

MALICIOUS

Office (OLE) / .DOC

61.0 KB Created: 2019-12-09 09:25:00
MD5: 06186dd1cf2033e7a9d4da6fb95ac31f SHA-1: 0787a54fa97ed07b72c6ca111930c2b8cc81ca4f SHA-256: a9a7e2936d94dede1a6afb99ca32d775d6121d7580045f5ebb9beff211f0c271
440 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The sample contains VBA macros that utilize WScript.Shell and cmd.exe, indicating an attempt to execute commands. The critical OLE_VBA_OBFUSCATED_SHELL_URL heuristic firing suggests the script constructs and executes a URL, likely to download a second-stage payload. The extracted URL 'https://vinnysvinyl.com/Pixlr.msi' is the most probable target for this download. The Document_Open macro is automatically executed upon opening the document, facilitating the attack.

Heuristics 11

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • Obfuscated VBA Shell command with URL critical OLE_VBA_OBFUSCATED_SHELL_URL
    VBA macro invokes Shell with command text assembled through decoder or string-manipulation functions and includes a URL. This is a high-confidence downloader/dropper pattern, stronger than Shell or URL evidence on their own.
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_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.
  • 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://vinnysvinyl.com/Pixlr.msi
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
cd4663b2ced9cf85cfa7912a3f4c88f34e9759963eb71ad7569f8f7c9adc052a		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3681 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 9 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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