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

Static analysis result for SHA-256 e255bd24730eb861…

MALICIOUS

Office (OLE) / .XLS

36.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2022-09-14
MD5: a3143c7dc32c3cdd07fc51aab7e6c98e SHA-1: 42290b65fe1ed432ac4218eabb7b5a5bf87d2c84 SHA-256: e255bd24730eb8613ee8a81033d4c97b14283ae0e01baa5c941867fbb7ea1810
242 Risk Score

Malware Insights

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

The Excel file contains a Workbook_Open macro that utilizes the Shell() function to execute a command. This command appears to be designed to download and execute a second-stage payload from the provided URL. The use of mshta.exe is also noted, suggesting a potential method for executing downloaded content.

Heuristics 7

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Reference to mshta.exe high SC_STR_MSHTA
    Reference to mshta.exe
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 https://www.mediafire.com/file/6vip6utwodclo5k/1.htm/file

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
ae9554fe43789e0dbde44a7d85915523d0ca15b548a5a2d482282f726129b224		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2388 bytes

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