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

Static analysis result for SHA-256 ea2e98d4c5b51777…

MALICIOUS

Office (OLE) / .XLSX

144.0 KB Created: 2006-09-28 05:33:49 Authoring application: Microsoft Excel
MD5: dc5252a8df1c01f3d2ef178b8b2e8ae7 SHA-1: 589c411c6c50115699bf72680e5dae89981e3021 SHA-256: ea2e98d4c5b51777da34f3ed7772706419a6c717c4aab9c5bb4cd596a07e7c08
280 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file is a macro-enabled Excel document that triggers a Workbook_Open event. The VBA code uses `CreateObject` to instantiate `Wscript.Shell`, which is then used to execute a batch file located at `c:\programdata\uylcsekn.bat`. The script also contains a long, obfuscated string that appears to be a list of URLs, likely for downloading additional payloads. The ClamAV detection further supports the malicious nature of this file.

Heuristics 7

  • ClamAV: Doc.Downloader.EmotetExcel02226-9938630-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetExcel02226-9938630-0
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
022b6ea87e671715cd07f596eceb5d45e85534a367868a0e820c8aa5cb013822		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6734 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

Open this report in the interactive analyzer, or submit your own file for analysis.