Malicious Office (OLE) / .XLS — malware analysis report

Static analysis result for SHA-256 e4d88152dd2c79fc…

MALICIOUS

Office (OLE) / .XLS

27.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 412ea26a4f6659d3b02aadf852414dd1 SHA-1: e1dcff463aafc2cd05a00a9d241ce7baf99d6587 SHA-256: e4d88152dd2c79fc1da1f6403e9d2a09e87151f1fc45c770d5a65f00164df108
220 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The critical heuristic 'OLE_VBA_SHELL' indicates the presence of a Shell() call within the VBA macros, which is a strong indicator of malicious intent. The 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristic further confirms that an auto-executing macro (Auto_Close) is using this Shell() call to execute code. ClamAV detection as 'Xls.Dropper.Agent-7653997-0' reinforces the malicious nature. The VBA macros likely download and execute a second-stage payload.

Heuristics 5

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Xls.Dropper.Agent-7653997-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.Agent-7653997-0
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close 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
fa188488eb4b980d8042632336a13ce6cf9ac06c685ca9a255cc2a9e32a2b2f4		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1466 bytes

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