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

Static analysis result for SHA-256 bafe01353ce04dbd…

MALICIOUS

Office (OLE) / .DOC

60.5 KB Created: 2020-04-19 02:19:00 Authoring application: Microsoft Office Word
MD5: 3310d059f2ba996e507ef56ac659f682 SHA-1: 01159c9ba18f07c0cb4e4ca55881cb298600eb14 SHA-256: bafe01353ce04dbd0bc6c03e5572ab1d73dea5c6b27982d60bff2273f6df4ced
400 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, specifically a Document_Open macro that utilizes WScript.Shell and CreateObject. This indicates the macro is designed to execute commands, likely to download and execute a secondary payload. The ClamAV heuristic also flags obfuscation, suggesting a deliberate attempt to hide malicious activity. No specific family could be identified, but the technique is common for initial access malware.

Heuristics 10

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • ClamAV: Xls.Macro.Obfuscation-9804250-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Macro.Obfuscation-9804250-0
  • 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
  • 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 http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
88e08aec5841acc093650c8a82100b59d9e580f01debb284f9b92658a6f87df4		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 14605 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved artifact contains 69 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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