Office (OLE) / .XLS malware analysis — malicious · 6bf7483d996493ce

MALICIOUS

Office (OLE) / .XLS

409.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel First seen: 2021-09-29

MD5: a120450ebe7f6455d46abd85369a002a SHA-1: 465a1f7e2aa26ce3e109c2dc559fb13e39ad8fb1 SHA-256: 6bf7483d996493cef544eed71355aacc8b3566cbd05639cc377fff248881e97e

162 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The sample is an Excel file containing VBA macros, including an Auto_Open subroutine, which is a common technique for executing malicious code upon opening. The macro references the URLDownloadToFile API, indicating its intent to download a second-stage payload from one of the embedded URLs. The presence of Auto_Close and Auto_Open macros, along with the URLDownloadToFile API usage, strongly suggests a macro-based downloader.

Heuristics 5

Reference to URLDownloadToFile API critical SC_STR_URLDOWNLOAD

Reference to URLDownloadToFile API
Auto_Open macro high OLE_VBA_AUTO

Auto_Open macro
Auto_Close macro high OLE_VBA_AUTOCLOSE

Auto_Close macro
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 http://190.14.37.173/
- http://111.90.148.104/
- http://51.89.115.111/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `56c0ee2129bf6ddf3a752d33fd7fa867cfc834d82cd12f3c855f07531734066f`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	3792 bytes

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