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

Static analysis result for SHA-256 9472df5dcc7d1b9e…

MALICIOUS

Office (OLE) / .XLS

73.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: db89e989fa20b31d2119919cad56a786 SHA-1: f689fe0a52f2e9e87e9ea32130e1f089a7a776ce SHA-256: 9472df5dcc7d1b9edfada8b0d0b8f452c0a2f55b802e3a43e5ba241768769d45
180 Risk Score

Malware Insights

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

The Workbook_Open macro executes upon opening the spreadsheet. It constructs a command to download a file named AnyDesk.exe from 'http://thepunchlineexpose.com/Manager/AnyDesk.exe' to 'C:\Users\Public\Documents\weekshe.exe' using Start-BitsTransfer, and then executes the downloaded file. The macro also writes this command to a temporary file 'C:\Users\Public\Documents\institutionsport.cmd'.

Heuristics 5

  • 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
d5387914e198af7231991211bf5d0f562a3477459899e11bf62650de3f4f0162		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1170 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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