Malicious Office (OOXML) / .XLSX — malware analysis report

Static analysis result for SHA-256 1bea081089eba379…

MALICIOUS

Office (OOXML) / .XLSX

52.9 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 15.0300
MD5: 5d26c12fc7b0d7c605076efad45d8681 SHA-1: be3da1ccd8468cc76b29d96df1d71d2e4d029138 SHA-256: 1bea081089eba379073470af2e29cf63f540f7ece2c44abd1f6ffc836629a657
362 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The sample is an Excel file containing VBA macros that leverage WScript.Shell and CreateObject to download financial data from specified URLs. The macros appear to be designed to trick users into enabling macro execution by presenting seemingly legitimate financial information, while in the background, they attempt to fetch and display data from external sources. The use of Shell() and WScript.Shell indicates an intent to execute commands or scripts, likely to download and display the financial data.

Heuristics 9

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • LOLBin reference in VBA critical OLE_VBA_LOLBIN
    LOLBin reference in VBA
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • CallByName call high OLE_VBA_CALLBYNAME
    CallByName call
  • 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 project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • 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://www.motobit.com
    • http://fund.eastmoney.com/
    • http://fundf10.eastmoney.com/FundArchivesDatas.aspx?type=jdzf&code=
    • http://fundf10.eastmoney.com/FundArchivesDatas.aspx?type=yearzf&code=
    • http://fundf10.eastmoney.com/jjjl_
    • http://fund.eastmoney.com/pingzhongdata/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
e4569427bcead7dc84947b5d1d12c0f1d4ef9740bdb5b63b233c7390f3d9ea24		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 17060 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 shell/COM execution token(s). Carved artifact contains 2 eval/decoder/string-building token(s).
vbaProject_00.bin
951fb4693a8ccc9eb48cb3ef8cc5d458d087bb3f967bb2a30b1ae67501bb8730		 vba-project OOXML VBA project: xl/vbaProject.bin 73216 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 shell/COM execution token(s). Carved artifact contains 2 eval/decoder/string-building token(s).

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