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

Static analysis result for SHA-256 b0cf639ddaa1992b…

MALICIOUS

Office (OLE) / .DOC

92.5 KB Created: 2017-05-22 17:45:00 Authoring application: Microsoft Office Word
MD5: c571fda65bd3fd7b68106a58f996328b SHA-1: cbed683f6d5a9ec0d310bad8139eb39a2556a036 SHA-256: b0cf639ddaa1992b9d0a2cf04d69a0faafb08a82ca71f05302855e50306a5d67
400 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The file contains VBA macros, including AutoOpen and Document_Open, which are commonly used to initiate malicious actions upon opening the document. The presence of CreateObject and GetObject calls, along with a reference to Windows Script Host, suggests the macro is designed to download and execute a second-stage payload. The ClamAV detection ID 'Doc.Downloader.W2000m-10002330-0' further supports its role as a downloader.

Heuristics 11

  • ClamAV: Doc.Downloader.W2000m-10002330-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.W2000m-10002330-0
  • 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
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • CallByName call high OLE_VBA_CALLBYNAME
    CallByName 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
    • http://schemas.openxmlformats.org/officeDocument/2006/bibliography
    • http://schemas.openxmlformats.org/officeDocument/2006/customXml

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
404d14f102385806e23c83ea18c43c2ae45d420b94c63c357ae7241463e7e31a		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 11329 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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