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

Static analysis result for SHA-256 a058f0c8ef292ed9…

MALICIOUS

Office (OLE) / .XLS

452.0 KB Created: 2020-10-12 07:55:59
MD5: bafd1e80a90bd5c62248e1c23877ff46 SHA-1: a426aa63803e96fa07d5acbbc1b7138dc2fe8f48 SHA-256: a058f0c8ef292ed93c5aa59d78764335ded47bba1a1bfd2d19d8c5fc809a6171
140 Risk Score

Malware Insights

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

The sample contains a Workbook_Open VBA macro that is designed to execute a PowerShell command. This command uses 'Invoke-WebRequest' to download a file from 'http://18.185.184.17/G6/0211300.jpg' and save it as 'C:\Users\Public\Documents\shiviyxfnp.exe'. It then executes the downloaded file. The VBA macro's primary function is to download and execute a second-stage payload from the embedded URL.

Heuristics 4

  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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
7b1896a26ca6bea5c596155da19dd34e97d7a6f2dddd359a85b1cf6a6a026859
vba-macro oletools.olevba.extract_macros (decoded VBA source) 1259 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.