Xls.Dropper.Agent-8230933-0 — Office (OOXML) / .XLSM malware analysis

Static analysis result for SHA-256 21355c7eb596e217…

MALICIOUS

Office (OOXML) / .XLSM

407.5 KB Authoring application: Microsoft Excel 16.0300
MD5: 73f2800cba26412ebd4406ebc4a216fe SHA-1: 98a65a0a99eda026ce63b4d43a2892cfaaefedb7 SHA-256: 21355c7eb596e21724d0a59545db0faf6219b858986cb5b0162201f54288ebb8
260 Risk Score

Malware Insights

Xls.Dropper.Agent-8230933-0 · confidence 95%

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The file is a macro-enabled Excel document (XLSM) containing a Workbook_Open macro, indicating an attempt to automatically execute malicious code upon opening. ClamAV detections identify it as 'Xls.Dropper.Agent-8230933-0', suggesting its primary function is to download and execute a secondary payload. The presence of VBA macros and the 'CreateObject' call further support its role as a dropper.

Heuristics 6

  • ClamAV: Xls.Dropper.Agent-8230933-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.Agent-8230933-0
  • 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.
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
0efc425ba521f37fef11c78b3eb853351662c9eab691e7d507b06b7f49ef1aaa		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 3151 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
vbaProject_00.bin
24e47460c7e51ac1baedb8a8ab2ca33acfef2a3bb8bb73974aef2ea9982540ed		 vba-project OOXML VBA project: xl/vbaProject.bin 5120 bytes
Detection
ClamAV: Xls.Dropper.Agent-8230933-0
Obfuscation or payload: unlikely

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