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

Static analysis result for SHA-256 7cce8fac3927e91e…

MALICIOUS

Office (OOXML) / .XLSX

314.3 KB Created: 2011-02-28 12:12:55 UTC Authoring application: Microsoft Excel 16.0300
MD5: 4c7c1906bc239889d66f69e93901b520 SHA-1: 659d65edba638a1188b2b797d9a0c7846ea2ca5a SHA-256: 7cce8fac3927e91e29323df0e4ecaf0c27bf3402995b526841473c0f5f3e4170
228 Risk Score

Heuristics 7

  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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
  • Hidden worksheet (hidden) low OOXML_HIDDEN_SHEET
    Excel workbook contains 2 hidden sheet(s) — hidden sheets are commonly used to conceal macro code, staging data, or intermediate payload construction

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
ae977ddd2f43f8866612e74ddfc3880bf1c03a9a5f54d6e8b1ee100643ac3a1f		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 97565 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 106 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.
vbaProject_00.bin
e6cfc7aec7576eacb33f7b926473c3b16749cb84be29a66845fedb2821ec58b2		 vba-project OOXML VBA project: xl/vbaProject.bin 286208 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
emf_00.emf
d5b8af615b52dde4fe9bad13b14c7852e157c56da55799a881e94ea72c1a20cd		 ooxml-emf OOXML EMF part: xl/media/image2.emf 2492 bytes
emf_01.emf
23c2fb56a09df45204ac4868b673b924248c0b487a2e36f91c41acfd12aa1e33		 ooxml-emf OOXML EMF part: xl/media/image1.emf 2528 bytes

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