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

Static analysis result for SHA-256 ad65f7e84d610ca1…

MALICIOUS

Office (OLE) / .XLS

2.56 MB Created: 2003-02-12 17:29:39 Authoring application: Microsoft Excel
MD5: 2852612d65cee47f15eab59b06156c72 SHA-1: 9f6767e37e6ef7d96c428c4653475851299da2fc SHA-256: ad65f7e84d610ca127ab4ed1eb83ec03e5c94079eeba025e7f0062f2d367cf6c
280 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1105 Ingress Tool Transfer

The file is an XLS document containing a malicious VBA macro. The macro utilizes Auto_Open and Auto_Close functions, and critically, it calls the Shell() function to execute arbitrary code. This indicates the macro's intent is to download and execute a second-stage payload from the unknown URL http://spiritweb.app.intra/N. The VBA code also exhibits string obfuscation, further suggesting malicious intent.

Heuristics 8

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close 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://spiritweb.app.intra/N
    • http://www.esri.com/software/arcexplorer/using_arcexplorer_java.pdfB

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
45c2a6a7541a069076da87e49ee5a2899bb5c9c7bfbcdea07bc80937b1b3823f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 916510 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 75 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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