Office (OLE) / .XLS malware analysis — malicious · b389a3744b8c3ea5

MALICIOUS

Office (OLE) / .XLS

105.0 KB Created: 2021-04-13 13:37:17 Authoring application: Microsoft Excel First seen: 2021-06-13

MD5: 395adec87aca5f5908da254523a80069 SHA-1: 5f816ffe52a7d0ff8c4df30d10d34ba9ab78e4c9 SHA-256: b389a3744b8c3ea5f83df52f97a8e963197b1bac24752f549ca3f416b860516a

182 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The sample is an Excel file containing VBA macros, specifically a Workbook_Open auto-exec macro. This macro uses CreateObject to likely download and execute a secondary payload from the embedded URL. The document body text was not available for analysis, but the macro behavior strongly suggests a downloader or initial access stage.

Heuristics 6

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 3 related findings OLE_VBA_MACROS

Document contains VBA macro code
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.
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 http://209.141.61.124/Q-2/4roleApp15.ex In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `1a814acc2c0911fe150815ad4e7e3388c8bda590df243e77e34a038191bdf0a5`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1240 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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