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

Static analysis result for SHA-256 d0fd83cca5fd25f7…

MALICIOUS

Office (OOXML) / .XLSM

136.7 KB
MD5: ecec6b76b4b310f972eca1c177f36f86 SHA-1: bf924bec87364468e263b3bf751d94801fcae428 SHA-256: d0fd83cca5fd25f743cf780eb98a945a538f58f0bd285e87bfff700150f5ba02
220 Risk Score

Malware Insights

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

The file is an XLSM document 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 document's purpose is to act as a downloader for a second-stage payload. The ClamAV detection further confirms the malicious nature of the file.

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/Xevcrjgjxoroh9.exe

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7ddcec6a45772b725e45697f0ca26bee65f779fdf1ed3ab8d100cb0680d01296		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1700 bytes
vbaProject_00.bin
b3654386e90c7be6ca3cad33c4cc4d862eb3ca00a4a0c08636e602bcc3e52b16		 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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