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

Static analysis result for SHA-256 d03ac314b35a4a7a…

MALICIOUS

Office (OLE) / .XLS

291.5 KB Created: 2018-12-06 20:43:11 Authoring application: Microsoft Excel First seen: 2022-03-09
MD5: 58121302ab1bfe023ac58cb270b83f19 SHA-1: 47c899c11bf607f981fb96e792436b01f00971c5 SHA-256: d03ac314b35a4a7ac15c5a8dfcc519b92214a70242d8ff9404970c905c3dd480
340 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1218.011 Signed Binary Proxy Execution: Rundll32

This XLS file contains a Workbook_Open macro that utilizes WScript.Shell to execute commands. The script attempts to leverage the 'Templates' special folder, likely to download and execute a secondary payload. The use of WScript.Shell and the Workbook_Open auto-execution trigger are strong indicators of malicious intent.

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
f93a65705740186d548eda964a04125bbf5f21e948fcf84e2a602162859df39a		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 27072 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.