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

Static analysis result for SHA-256 b8fd5c300338d7c3…

MALICIOUS

Office (OLE) / .DOC

229.0 KB Created: 2021-04-19 06:47:00 Authoring application: Microsoft Office Word
MD5: f32ca8339b4d87e7b418a31f219118e1 SHA-1: 162aec67016bc0b58278103fa0bb8b8484f76801 SHA-256: b8fd5c300338d7c37c7f894978c45a4112333af4351acb54a667f1572df00eb2
340 Risk Score

Malware Insights

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

The sample contains a critical OLE_VBA_SHELL heuristic firing, indicating the use of the Shell() function within VBA macros. This is further supported by OLE_VBA_WSCRIPT and SC_STR_WSCRIPT firings, confirming the use of WScript.Shell. The AutoOpen macro and CreateObject calls suggest an automated execution flow designed to download and execute a secondary payload. The confidence is high due to these strong indicators, but the family remains unknown as no specific indicators point to a known malware family.

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
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen 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
6ea0896cd80321c66a53866ebf45381caa494cd0d5647b247fa4f0b9a5af7957		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 95675 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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