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

Static analysis result for SHA-256 13c173e0e637fa9e…

MALICIOUS

Office (OLE) / .XLS

204.5 KB Created: 2020-11-08 22:50:19
MD5: a23d892bf2978748da2d1637534b1d79 SHA-1: 1fc581342bd001e179a7d659cc1e24051ed24fcf SHA-256: 13c173e0e637fa9e87b0dfc7cd1cb64fc0e7276cee919339a8f1200f03af90b9
202 Risk Score

Malware Insights

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

The sample is an XLS file containing VBA macros that leverage PowerShell to download and execute a second-stage payload from the URL http://5.149.250.150/T5/JHF-41023.exe. The PowerShell command is embedded directly in the document body, indicating a clear intent to execute the downloaded file. The ClamAV detection further confirms its malicious nature.

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://5.149.250.150/T5/JHF-41023.exe

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
da3824be6b29314b36dee89864784d017c774c9e2431841fca142ddd5a580df6
vba-macro oletools.olevba.extract_macros (decoded VBA source) 1890 bytes