Malicious Office (OOXML) / .XLSX — malware analysis report

Static analysis result for SHA-256 ec229743f81ac84c…

MALICIOUS

Office (OOXML) / .XLSX

185.3 KB
MD5: bf90ffe80b03f3f4b75c9cf885790bc9 SHA-1: 3630b5fc4fe309e2d6b07102913881bdfbc9ec7a SHA-256: ec229743f81ac84c775bffc9dfe6716f6f6b231f76324babed0094c36cd81e24
220 Risk Score

Malware Insights

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

The sample is an XLSX file containing VBA macros. The document body reveals a PowerShell command designed to download an executable from 'sparepartiran.com' and then execute it. This indicates the file's purpose is to act as a downloader for a second-stage payload. The presence of VBA macros and the specific PowerShell execution command 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
  • 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
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — 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/2Q/Pdxpforzum1.exe

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
dd4ce104df65e7aa02a4ad25028640e994ebadca5767a5d1b7c1f1d18ab4512e		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1700 bytes
vbaProject_00.bin
2cfae55e74e502430ae159e6d1ff6634d4bdf1bf9f4c737e0ce0e365b2609b0f		 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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