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

Static analysis result for SHA-256 285c9cde62db62d3…

MALICIOUS

Office (OOXML) / .XLSM

149.8 KB Authoring application: Microsoft Excel 15.0300
MD5: 2469a2c6c22c3b5d2b76b94ec396515c SHA-1: 486d74c871bb2e6798ca7d8b0b51ccdc80982ff3 SHA-256: 285c9cde62db62d312093ace0211a875e94930da8a426386719dea91a0be7d64
220 Risk Score

Malware Insights

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

The sample is an XLSM file containing VBA macros. The document body explicitly shows a PowerShell command designed to download an executable from 'weeshoppi.com' and then execute it. This indicates a downloader attack pattern. 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://weeshoppi.com/wp-includes/ID4/M4hG5vM7xsh6UtV.exe

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
6dddb8dba0a3e114ad00b86af3ec355956a55c8fac447e32fdaeaea71cb3e437		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2169 bytes
vbaProject_00.bin
9a82a036c31c3de3a72b72026a9a4461bb5c3e387b3c925a29f65e6ad95e545e		 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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