MALICIOUS
160
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Service Execution: Service Execution
T1204.002 Malicious File: User Execution: Malicious File
The file contains Excel 4.0 macros, specifically an Auto_Open function, which is a known technique for executing malicious code. The macro sheet contains a reference to a URL, 'http://bqx12lnjk03rrdio.xyz/i.', which is likely used to download and execute a second-stage payload. The presence of a lure to enable macros further supports this attack pattern. The macro also attempts to register a server using '../zfbfg.ere', indicating potential for further malicious activity.
Heuristics 4
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Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAMEoletools recovered an Auto_Open / Auto_Close entry from an Excel 4.0 macro sheet. The raw BIFF name can be tokenized or partially opaque to byte-string checks, but the recovered macro listing confirms the workbook has an XLM auto-execution entry.
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XLM Auto_Open with dangerous formula APIs critical OLE_XLM_DANGEROUS_FNExcel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
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Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPENWorkbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
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Macro/content-enable lure medium SE_ENABLE_LUREDocument instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
xlm_macros.txt3a08691eed72e5ed205a0b2d682f61d57bf1de10bae67e5c55da30ecdcba1b08 |
xlm-macro | oletools.olevba.extract_all_macros (XLM macro listing) | 4335 bytes |
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