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

Static analysis result for SHA-256 b51c07d9a4e50ac4…

MALICIOUS

Office (OLE) / .XLS

42.5 KB Created: 2021-06-08 20:44:48 Authoring application: Microsoft Excel
MD5: ee6d2f06ce4476370cb830acb3890dca SHA-1: 1c1544fbad9dc1abe6585e85ce686bba5f5e85a2 SHA-256: b51c07d9a4e50ac499514d378320260821bd7486acd1077a6bddf8ab70c6a2b3
340 Risk Score

Malware Insights

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

The file is an XLS document containing VBA macros. The Workbook_Open event is configured to execute code that utilizes WScript.Shell and CreateObject, indicating an attempt to run external commands or download additional content. No specific URLs or hashes were extracted, but the macro's behavior strongly suggests a downloader or initial access mechanism.

Heuristics 8

  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
866448819f074114722cde2b3dc6da6d49ba0711fe6ca7547d50d7df6384c566		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1933 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(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.