Sagent — Office (OOXML) / .XLSM malware analysis

Static analysis result for SHA-256 83ce0aa9ef353526…

MALICIOUS

Office (OOXML) / .XLSM

137.0 KB
MD5: 1bc16e43c074b094947dcd43a5d8768c SHA-1: 256b7172410b81344fcc386bd9fa4497709910e8 SHA-256: 83ce0aa9ef353526275abb38440701b9ee960390d93520c450adeba41f665409
222 Risk Score

Malware Insights

Sagent · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment

The sample is an XLSM file containing VBA macros that leverage CreateObject to execute a PowerShell command. This PowerShell command downloads a second-stage executable from 'http://sparepartiran.com/js/pt/CNsF60DZWxKsruz.exe' and saves it as 'C:\Users\Public\eriajhqr.exe' before executing it. The ClamAV detection 'Xls.Malware.Sagent-10035294-0' further supports the malicious classification.

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://sparepartiran.com/js/pt/CNsF60DZWxKsruz.exe

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
ceb8a7b8c7f063e0eb2515ec9b99a6a9c78c7cd7b5b7a98fbf09f51140d84e89		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2169 bytes
vbaProject_00.bin
760e3e03202cee7131ab3bf8d651ee990ea381e4bd773cf1b4f9042e7fc323b2		 vba-project OOXML VBA project: xl/vbaProject.bin 5632 bytes
Detection
ClamAV: Xls.Malware.Sagent-10035294-0
Obfuscation or payload: unlikely

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