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

Static analysis result for SHA-256 132febbd685d3a26…

MALICIOUS

Office (OLE) / .XLS

314.5 KB Created: 2018-12-06 20:43:11 Authoring application: Microsoft Excel First seen: 2022-11-18
MD5: 6c19f81fdd17bcfe1e2f603dabbb2a6e SHA-1: 5f46fc84968bc1bf237489c48608200e99350a8c SHA-256: 132febbd685d3a267b92b9143f4effbaf0df56b58764dd2f6bcd44908ba0b4a8
380 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1059.001 PowerShell T1204.002 Malicious File T1105 Ingress Tool Transfer

The sample is an Excel file containing a Workbook_Open macro that utilizes WScript.Shell to execute commands. The macro is designed to download and execute a second-stage payload, as indicated by the 'OLE_VBA_HTTP_DROP_EXEC' heuristic. The document body attempts to trick the user into enabling content by stating the spreadsheet is blurred due to screen size.

Heuristics 9

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC
    VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
1bdb722c8e1183086ed085cfdfc1bb8208c97bbba4009105fd28d3b3ee3062b2		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 12202 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.