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

Static analysis result for SHA-256 0fcb57e654f731d2…

MALICIOUS

Office (OLE) / .XLS

77.0 KB Created: 2020-04-28 09:56:52 Authoring application: Microsoft Excel
MD5: 6fdd929eed194da411eae97304f33f11 SHA-1: 19c3702e966705377accd4020b14c97e517432bc SHA-256: 0fcb57e654f731d2c7f000ca7b78a0596cc0938f9fb8da70d8f06e63d8db9c25
280 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The Excel file contains VBA macros that leverage WScript.Shell to execute commands. The `Shell()` function is used, and the script attempts to construct a command by concatenating values from spreadsheet ranges. This strongly suggests the macro is designed to download and execute a secondary payload. The ClamAV detection 'Doc.Dropper.Agent-7724224-0' further supports this dropper functionality.

Heuristics 6

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • ClamAV: Doc.Dropper.Agent-7724224-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-7724224-0
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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
0e52df386030db15123bf0a10b07d3b5889c06de589784000d3337c945b28300		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1275 bytes

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