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

Static analysis result for SHA-256 d97464f2a40e2141…

MALICIOUS

Office (OLE) / .XLS

643.5 KB Created: 2008-01-02 07:03:45 Authoring application: Microsoft Excel
MD5: 43ab382f70ac313542eb8e1e42ef0f0f SHA-1: e9859a615a8aba01744d734498c67659eb6d2c39 SHA-256: d97464f2a40e21414e5d13b8b624775ddffd7b3ac34d861d4bf71a45b2f7a9a1
180 Risk Score

Malware Insights

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

The sample is an Excel file containing a Workbook_Open VBA macro that uses CreateObject, indicating it's designed to execute code upon opening. The macro likely attempts to download and execute a second-stage payload from one of the embedded URLs. The document body provides instructions on enabling macros, serving as a social engineering lure to bypass security measures.

Heuristics 6

  • 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.
  • 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 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://sylvi/db/funel/gwt#Model_13
    • https://sylvi/db/funel/gwt#Model_11
    • https://sylvi/db/funel/gwt#Model_14
    • https://sylvi/db/funel/gwt#Model_36
    • https://sylvi/db/funel/gwt#Model_34
    • https://sylvi/db/funel/gwt#Model_30
    • https://sylvi/db/funel/gwt#Model_26
    • https://sylvi/db/funel/gwt#Model_28
    • https://sylvi/db/funel/gwt#Model_6
    • https://sylvi/db/funel/gwt#Model_49
    • https://sylvi/db/funel/gwt#Model_39
    • https://sylvi/db/funel/gwt#Model_50
    • https://sylvi/db/funel/gwt#Model_51
    • https://sylvi/db/funel/gwt#Model_32
    • https://sylvi/db/funel/gwt#Model_53
    • https://sylvi/db/funel/gwt#Model_46
    • https://sylvi/db/funel/gwt#Model_54
    • http://localhost:8000/db/funel/gwt#Model_48
    • http://localhost:8000/db/funel/gwt#Model_59
    • http://localhost:8000/db/funel/gwt#Model_5
    • http://localhost:8000/db/funel/gwt#Model_60
    • http://localhost:8000/db/funel/gwt#Model_8
    • http://localhost:8000/db/funel/gwt#Model_27
    • http://localhost:8000/db/funel/gwt#Model_25
    • https://sylvi/db/downloads/C_Sylvi_Lib.h$
    • https://sylvi1/db/downloads/VBA_Sylvi_Lib.vba
    • http://localhost:8000
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
c290444fd213a7c977920d3f85f0dbe70df7c0b8f9a51e20aac82271d16f5b1c		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 224443 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 28 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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