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

Static analysis result for SHA-256 a546798e1b14e191…

MALICIOUS

Office (OLE) / .XLS

409.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 343e89935e145df4e6b5641b3bc19022 SHA-1: cf06b4fc6616a14180e51d330fbe83c0fe0da41b SHA-256: a546798e1b14e19190dd9de10d68d54b2bf5e7b16f85564dada5eac83c9884bb
182 Risk Score

Malware Insights

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

The sample contains VBA macros, including an Auto_Open subroutine, which is a common technique for executing malicious code upon opening the document. The heuristic firing for URLDownloadToFile API indicates the macro attempts to download a file from a remote URL. The embedded URLs are likely used for this purpose. The script's intent is to download and execute a second-stage payload from one of the provided URLs.

Heuristics 6

  • Reference to URLDownloadToFile API critical SC_STR_URLDOWNLOAD
    Reference to URLDownloadToFile API
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close macro
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Suspicious extracted artifact medium 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.
  • 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://179.43.152.158/
    • http://185.183.96.206/
    • http://94.140.114.130/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
f730ac116c949a7452a80c0d5e100f9ded2e7e1ae26b7ba15d4cb78120b285d7
vba-macro oletools.olevba.extract_macros (decoded VBA source) 3798 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 shell/COM execution token(s).