Sagent — Office (OOXML) / .XLSM malware analysis

Static analysis result for SHA-256 0dfb6dedf16fe196…

MALICIOUS

Office (OOXML) / .XLSM

21.6 KB
MD5: 25cf5f1498ceb64113396d50120afbbe SHA-1: cdbff95d57bab9b21d70c023be78c120917a32c7 SHA-256: 0dfb6dedf16fe1966f74948c3ca757053220a8aae59473ca68cb869b05119154
222 Risk Score

Malware Insights

Sagent · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The sample is an XLSM file containing VBA macros. The macro uses CreateObject to execute a PowerShell command that downloads a second-stage executable from 'http://46.183.222.25/LVS7Kabg6OuIx3R.exe' and then executes it. This behavior is indicative of a downloader malware.

Heuristics 6

  • ClamAV: Xls.Malware.Sagent-10035294-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Malware.Sagent-10035294-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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 project inside OOXML medium OOXML_VBA
    Document contains a VBA project — VBA macros present
  • 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://46.183.222.25/LVS7Kabg6OuIx3R.exe

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
126641b157f57af21b60026a750851009c0ad966cc5ce6bdd8ff5d3eed104ef7		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1310 bytes
vbaProject_00.bin
c2378c0849e7e47949780b0c09bb28148c84c6e79130b22ffb7f656a7e8c4704		 vba-project OOXML VBA project: xl/vbaProject.bin 5120 bytes
Detection
ClamAV: Xls.Malware.Sagent-10035294-0
Obfuscation or payload: unlikely

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