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

Static analysis result for SHA-256 676c33f655bca652…

MALICIOUS

Office (OLE) / .XLS

377.5 KB Created: 2020-11-24 22:58:59
MD5: ef977594e32b307af45f985ce0ee9064 SHA-1: a5dcebc335cf8942eb36359ccc5247dbc7ba2a96 SHA-256: 676c33f655bca65287d473f2818f01c293f31c048cc4bd52eb40ab8d3f59cdc3
202 Risk Score

Malware Insights

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

The VBA macro contains a call to CreateObject and references PowerShell, which is then used in the document body to download and execute a file from 'http://sparepartiran.com/js/2Q/Twvaedwzfyck1.exe'. The PowerShell command explicitly writes the downloaded file to 'C:\Users\Public\poljrobc.exe' and then executes it. This indicates a downloader or droppper functionality.

Heuristics 6

  • ClamAV: Xls.Malware.Sagent-10035294-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Malware.Sagent-10035294-0
  • Reference to PowerShell high SC_STR_POWERSHELL
    Reference to PowerShell
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://sparepartiran.com/js/2Q/Twvaedwzfyck1.exe

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
c7fc468b382124385d0485d8a2f78d74a4a5a15de824c2213960719336eb8b85
vba-macro oletools.olevba.extract_macros (decoded VBA source) 1700 bytes