Office (OLE) / .XLS malware analysis — malicious · 1ec70ecae8b67041

MALICIOUS

Office (OLE) / .XLS

44.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel

MD5: 3f0d1d1ccf240625a0c6e0d02043ef66 SHA-1: 4add1394d237ae0008bad05e42c39e7b1041549d SHA-256: 1ec70ecae8b6704112e76627761732672b408019034a603e97e88e4c582af929

220 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 file contains Excel 4.0 macros, including an Auto_Open macro, which is a strong indicator of malicious intent. The macro utilizes the URLDownloadToFile API, suggesting it downloads and executes a second-stage payload from the URL http://digiton.pk/tcitmgcseie/. The presence of a macro-enable lure further supports this, as it's a common technique to bypass security measures.

Heuristics 5

Reference to URLDownloadToFile API critical SC_STR_URLDOWNLOAD

Reference to URLDownloadToFile API
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.
XLM Auto_Open with dangerous formula APIs critical OLE_XLM_DANGEROUS_FN

Excel 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.
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

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_macros.txt` `ec0714f458f545868feeb77a213e9463d6be5353f1c46da2106dd62e57f53688`	xlm-macro	oletools.olevba.extract_all_macros (XLM macro listing)	2974 bytes

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