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

Static analysis result for SHA-256 74b115a8b1f4e18d…

MALICIOUS

Office (OLE) / .XLS

203.5 KB Created: 2020-11-27 09:06:11
MD5: 899e5af08f0794f0131adbf03f841045 SHA-1: 242508434986d472b0b83387ec8d5d33888baa29 SHA-256: 74b115a8b1f4e18d26b092dc965b60ad94dba931591d9913db219823d294904a
202 Risk Score

Malware Insights

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

The sample contains VBA macros that, when executed, leverage PowerShell to download a portable executable from 'http://sparepartiran.com/js/2Q/5901777.pdf.exe' and save it as 'C:\Users\Public\oftmhayq.exe'. The script then proceeds to execute this downloaded file, indicating a downloader or droppper functionality. The presence of a PowerShell command and the execution of a downloaded file are strong indicators of malicious intent.

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/5901777.pdf.exe

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
22e0fe03abe29c799737c27918ee774062d58f00ec4d44766cb0a8c5f19557b8
vba-macro oletools.olevba.extract_macros (decoded VBA source) 1700 bytes