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

Static analysis result for SHA-256 e30a4a8294ececc4…

MALICIOUS

Office (OLE) / .DOC

180.0 KB Created: 2022-03-22 11:01:00 Authoring application: Microsoft Office Word First seen: 2022-03-22
MD5: e83ba49479c12cfd45f25c746c713a6a SHA-1: c82919bf22885061a29e0cfb7839b10037bde5ba SHA-256: e30a4a8294ececc4bdd06326732556c357760590e86583b5adb86e6ff5bdae78
342 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 trigger on document open. These macros utilize WScript.Shell to access special folders, specifically the 'Templates' directory. The primary intent appears to be the execution of a second-stage payload, as indicated by the critical heuristic firings for Shell() and WScript.Shell usage. The obfuscated nature of the script and the presence of multiple execution-related heuristics suggest a downloader or dropper functionality.

Heuristics 9

  • 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
  • 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
eb37953803db660e0986c2d34d2d51e7d5e2d9c2db6b90840062ab67d99c7416		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 37178 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 shell/COM execution token(s). Carved artifact contains 116 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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