Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5d0dbe35a169eea8…

MALICIOUS

Office (OLE)

41.5 KB Created: 2010-03-01 16:43:25 Authoring application: Microsoft Excel
MD5: 57261996916b8f8b5704bd872f6886f4 SHA-1: 5619cd00d88aeeeee1cfa47d1801155a5e644d6f SHA-256: 5d0dbe35a169eea86cd75d435e6ea553a0f1db55feb29db9e5698dc89b786491
260 Risk Score

Malware Insights

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

The file is an Excel document containing VBA macros, specifically triggering Auto_Open and Workbook_Open events. These macros are designed to execute code, likely to download and execute a second-stage payload. The presence of `ExecuteExcel4Macro` and the obfuscated registry-related constants suggest an attempt to establish persistence or further compromise the system. The document body, appearing as a school lunch menu, serves as a lure to disguise the malicious intent.

Heuristics 6

  • 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 p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • 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
19c4d7d7a262ec2c34f9d1068b8fc63956028c0dc19709c55a1ed4563a8d0356
vba-macro oletools.olevba.extract_macros (decoded VBA source) 10320 bytes
Detection
ClamAV: Xls.Trojan.Divi-2
Obfuscation or payload: unlikely