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

Static analysis result for SHA-256 55f117500a431d05…

MALICIOUS

Office (OLE) / .XLS

132.0 KB Created: 2018-12-06 20:43:11 Authoring application: Microsoft Excel First seen: 2022-03-01
MD5: be5a3d9934743ade5bf312aa38918da2 SHA-1: b1b5f53bfba753cadc935296e6e278048c4ed07b SHA-256: 55f117500a431d054ccd86997dd1c552551388f9f4ca1b8a9fe99f44c00e3d38
348 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell

This Excel file contains VBA macros that are automatically executed upon opening due to the Workbook_Open event. The macros utilize WScript.Shell to execute commands, indicating a likely attempt to download and run a secondary payload. The obfuscated nature of the script and the use of WScript.Shell are strong indicators of malicious intent.

Heuristics 9

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • 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.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
c04e191a4d2c2853bc0569c144dd40d5c4295e9b9e55f03fb219fe260e32968d		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 46041 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 shell/COM execution token(s). Carved artifact contains 3 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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