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

Static analysis result for SHA-256 df416e24d2745c7b…

MALICIOUS

Office (OLE) / .XLS

293.0 KB Created: 2018-12-06 20:43:11 Authoring application: Microsoft Excel
MD5: ad5882017b66f31c0d5472addf629bd4 SHA-1: 4bdc1fedb400dbe20d95cab9aab1ccbc3a18839b SHA-256: df416e24d2745c7b507599c2f04f05a50c158902ca474642f1b1e2d3ed53748d
340 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1218 Signed Binary Proxy Execution

This XLS file contains VBA macros, including a Workbook_Open event, which is a common technique for automatic execution upon opening. The macros utilize WScript.Shell and CreateObject, indicating an intent to execute arbitrary commands. The obfuscated script content and lack of clear URLs prevent definitive identification of the payload, but the overall pattern 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
d906a4b729884ad56b542f315c157e79d63ce19a95a18ea1bb064050245945a0		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20270 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 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.