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

Static analysis result for SHA-256 68a45bc4c6568ca9…

MALICIOUS

Office (OLE) / .XLS

28.0 KB Created: 2021-04-13 13:37:17 Authoring application: Microsoft Excel
MD5: b2b5b8f72a1f20628ffff983ef97660f SHA-1: 0ceaf64f54a9732850236729a4cf3721ba63cd30 SHA-256: 68a45bc4c6568ca98f473f11a004f3e8d9d34cecd4747f705c4fd8af3c02b5fa
142 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The Workbook_Open VBA macro executes a PowerShell command to download a file from http://209.141.61.124/Q-2/fsoleApp1.ex and save it as C:\Users\Public\Documents\everythingserious.ex, which is then executed. This indicates a downloader or dropper functionality, commonly associated with initial stages of malware infection.

Heuristics 5

  • 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.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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://209.141.61.124/Q-2/fsoleApp1.ex

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
6d4b32e129be878a76872eefbfbadcc5c076166bde0e3bf3e5461b0e8ee4d000		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1239 bytes

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