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

Static analysis result for SHA-256 d6c487b1fb3d3185…

MALICIOUS

Office (OLE) / .XLS

67.0 KB Created: 2021-08-17 12:24:08 Authoring application: Microsoft Excel
MD5: 97c8a4a020e91a415d49f77293db32b2 SHA-1: 22d67ef270e69fdddd2a4a7a8986d575922fc14b SHA-256: d6c487b1fb3d31851921b343f3d131f7cb4c0469a60484037a6fa8cfbdc29dea
160 Risk Score

Malware Insights

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

The file is a malicious Excel spreadsheet containing an Auto_Open macro. This macro utilizes the ScriptControl object to execute embedded VBA code, which is known to be exploitable via CVE-2015-0097. The ClamAV detection name 'Xls.Downloader.MirrorBlast' suggests the macro's purpose is to download and execute a secondary payload. The heuristic firings strongly indicate this exploit and macro execution.

Heuristics 4

  • MSScriptControl.ScriptControl — CVE-2015-0097 high CVE likely CVE_2015_0097_SC
    MSScriptControl.ScriptControl — CVE-2015-0097
  • ClamAV: Xls.Downloader.MirrorBlast-f8f807074fc98734-9955046-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.MirrorBlast-f8f807074fc98734-9955046-0
  • 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
c5b27ae94e08564e865ba50cddfc76a6a9e2536146851a8b85b6e38e5bc1eef3		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1202 bytes

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