Office (OLE) / .XLS malware analysis — malicious · dab3cf9af1f7204d

MALICIOUS

Office (OLE) / .XLS

380.5 KB Created: 2015-06-05 18:19:34 Authoring application: Microsoft Excel

MD5: 0e58d82053c23d1c6f16b09857384a00 SHA-1: 11ad86cf8ea8cff93891bea35fe8d85bc459bf54 SHA-256: dab3cf9af1f7204d17e0ec0cbdfd89cced9ab26060d0de61924aa4265fcdbf6f

102 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic for Applications T1204.002 Malicious File T1059.001 PowerShell T1105 Ingress Tool Transfer

The sample is an Excel file containing Excel 4.0 (XLM) macros, specifically an Auto_Open macro, which is designed to execute automatically when the workbook is opened. The document body contains embedded URLs and hints at macro commands like 'CALL', 'RUN', 'DOWNLOADFILE', and 'REGISTERSERVER', indicating the script's intent to download and execute a second-stage payload from one of the provided URLs. The 'SE_ENABLE_LURE' heuristic confirms the presence of a user-facing prompt to enable macros, a common social engineering tactic.

Heuristics 4

Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAME

oletools 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.
Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN

Workbook 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.
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — context-specific rules above attribute URLs they actually evaluated; this rule lists URLs that were present in the bytes but were not otherwise tied to a specific finding.
URL https://hermescomm.net/x9NvrhL0/lena.html
- https://asistenciajuridicaintegral.com/6YiCkNix5/lena.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_macros.txt` `be629cb484f8d82e38c4234ddbad4f1755e762b9c1c8359642d99f8c77e6e858`	xlm-macro	oletools.olevba.extract_all_macros (XLM macro listing)	8812 bytes

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