Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 90faa3f80a2d24b5…

MALICIOUS

Office (OLE)

60.0 KB Created: 2002-11-29 17:43:02 Authoring application: Microsoft Excel
MD5: aa9aad24db70173a8ef96c2c5bee22d3 SHA-1: e3107f395abf640c59d220ccdd3154cdfd1df333 SHA-256: 90faa3f80a2d24b536150a65a524aa296cf2b06756a7404f4f52d777828c5b09
220 Risk Score

Malware Insights

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

The file is an Office document containing VBA macros, specifically triggering Workbook_Open and Auto_Open events, indicating a malicious intent to execute code upon opening. ClamAV detection as 'Xls.Trojan.Divi-2' further confirms its malicious nature. The presence of these auto-executing macros suggests the primary goal is to download and execute a second-stage payload.

Heuristics 5

  • ClamAV: Xls.Trojan.Divi-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Trojan.Divi-2
  • 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
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open macro
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
c8e74ddfd32927a091168647e9d5baa145105b89e7cde8f142f3f2a8828acdd6		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10341 bytes
Detection
ClamAV: Xls.Trojan.Divi-2
Obfuscation or payload: unlikely

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