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

Static analysis result for SHA-256 bae27fcdfb5f6d1b…

MALICIOUS

Office (OLE) / .XLS

118.0 KB Created: 2021-04-13 13:37:17 Authoring application: Microsoft Excel
MD5: c9f8349ef19ac06559da00a6a3990b5b SHA-1: e546cb01d3d09ca780fdfcfe61eb88cd1fc331e4 SHA-256: bae27fcdfb5f6d1b14d0588af9fed0e6c85ee30d5f9d4060a6827d8f62cc446e
400 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The sample is an XLS file containing a Workbook_Open macro that utilizes WScript.Shell and CreateObject to execute obfuscated VBA code. This code is designed to download and execute a second-stage payload from a suspicious URL, indicating a downloader or droppper functionality.

Heuristics 9

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • Obfuscated VBA Shell command with URL critical OLE_VBA_OBFUSCATED_SHELL_URL
    VBA macro invokes Shell with command text assembled through decoder or string-manipulation functions and includes a URL. This is a high-confidence downloader/dropper pattern, stronger than Shell or URL evidence on their own.
    URL http://scaladevelopments.scaladevco.com/17/andre34.ex
  • 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
ec856bc65c5b9ac64a7e13929358dac371f459be55fd35641baec1dc080bad98		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1142 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.