Office (OLE) / .XLS malware analysis — malicious · ef9609e5464af08c

MALICIOUS

Office (OLE) / .XLS

142.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel

MD5: 988ae46f23fd092b97b145c040fba998 SHA-1: b9422aa22a5af0dea61d4e4828e630e4de6a2031 SHA-256: ef9609e5464af08c6147eafeaa63a3cdf23273e2a8631df5aa91c23a849cfcf9

280 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.005 Visual Basic T1204.002 Malicious File

The sample is a macro-enabled Excel file that triggers a Workbook_Open event. This event uses `CreateObject` to instantiate `Wscript.Shell` and `Scripting.FileSystemObject`. The script then attempts to execute a batch file located at `c:\programdata\jledshf.bat` and a VBScript at `c:\programdata\sduoixo.vbs`. The VBScript appears to be a downloader, attempting to fetch payloads from multiple URLs, including `http://goyalua.vmesha.in/0v6kcnky/CG/`, `https://mars.srl/wp-admin/7Ffk6LN2YXs2W/`, and `http://franmuler.es/mbx/8c5RBJx6/`. The presence of `Wscript.Shell` and the execution of external scripts indicate a clear intent to download and execute additional malicious content.

Heuristics 7

ClamAV: Doc.Malware.Valyria-10004384-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Valyria-10004384-0
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
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.
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 OLE_VBA_MACROS

Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `527d0656a0c2c323955d068683ef8f7e20c035cda247a1e24383595c0eb3403b`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	7821 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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