Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 999919e784b72e1e…

MALICIOUS

Office (OLE)

135.0 KB Created: 2007-10-10 08:15:05 Authoring application: Microsoft Excel
MD5: 02826224800b8403d6f0d750bb3fe886 SHA-1: 34fe38721051cb77e243ca0d232a172173033c1e SHA-256: 999919e784b72e1e03a14b92325e3f6f0f6f258099d1c1271c4381702baaa6a4
128 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1071.001 Web Protocols

The file is an Office document containing VBA macros. A high-severity heuristic indicates VBA p-code auto-execution with shell execution tokens, suggesting the macro attempts to run external commands. The presence of a large encoded blob within the VBA project further supports a malicious intent. While no specific URLs or network indicators were extracted, the macro's execution of shell commands points to a downloader or dropper functionality. The document body contains what appears to be financial or customer data, which could be a lure or a distraction.

Heuristics 4

  • Heap-spray pattern detected high SC_HEAP_SPRAY
    Repeated 0x41 (A) bytes found
  • 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 project contains no executable statements low OLE_VBA_MACROS
    Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
220f878c0f501a684989caa79f9fe1451de68d4d32b466d345212ad87c829149		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 65755 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 88 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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