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

Static analysis result for SHA-256 1d7e3d60e214d1fc…

MALICIOUS

Office (OLE) / .XLS

65.5 KB Created: 2018-12-06 20:43:11 Authoring application: Microsoft Excel
MD5: 37318ca18710617d3a4fc2d5a265ee27 SHA-1: a7a72f93dc313bfb65e93c78b945d8372fa2ab3b SHA-256: 1d7e3d60e214d1fc965d00c37ad9abdb4a9ffdb6e68ab2802467507580d4e6b9
362 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

This Excel file contains malicious VBA macros, specifically a Workbook_Open macro that utilizes WScript.Shell to execute commands. The document body instructs the user to 'enable content to display this transaction SWIFT,' acting as a lure. The script appears to be obfuscated, but the presence of Shell() and WScript.Shell calls indicates it likely attempts to download and execute a second-stage payload. The benign URLs extracted are not considered malicious IOCs.

Heuristics 10

  • 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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
b0223d38b15df61ae294f17d9c6dee9cc15ff68507f6fefcac002b691c56923e		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 50895 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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