Office (OOXML) / .XLSX malware analysis — malicious · 53ecab413153a807

MALICIOUS

Office (OOXML) / .XLSX

111.6 KB Created: 2015-06-05 18:17:20 UTC Authoring application: Microsoft Excel 12.0000

MD5: b7f54883316df0942d9a3209ccec5547 SHA-1: 98054a6775958fa89846fd440f9bd63a51a237ec SHA-256: 53ecab413153a807732d9eb3ebdb2786874f263eca4e3d5fadfaf83ba5d69de1

260 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1059.003 Windows Command Shell

The file is identified as malicious by ClamAV and contains a Workbook_Open VBA macro, indicating an attempt to automatically execute code upon opening. The macro uses CreateObject to interact with the system and appears to construct commands to download and execute files from several URLs. Specifically, it attempts to execute a batch file from 'c:\programdata\jledshf.bat' and a VBScript from 'c:\programdata\sduoixo.vbs'. The reconstructed URLs are: http://reumatismlinic.com/./scCnm3mbJRpsaKBbrC/, https://shodhmanjar.com/wp-admin/xJE4m4Pd3N/, http://tubelocal.net/wp-admin/X4Xm4Mk/, https://pacificchomebroker.com/roderick/RRk/, and https://molinai-journal.com/roderick/Rk/. The script's intent is to download and execute a second-stage payload.

Heuristics 6

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

ClamAV detected this file as malware: Doc.Malware.Valyria-10004384-0
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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 project inside OOXML medium OOXML_VBA

Document contains vbaProject.bin — VBA macros present

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `527d0656a0c2c323955d068683ef8f7e20c035cda247a1e24383595c0eb3403b`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	7821 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `4fc21411db284845603aea4af6b15a5433979c357b00e2e87cfda21e1131b420`	vba-project	OOXML VBA project: xl/vbaProject.bin	37888 bytes
Detection ClamAV: Doc.Malware.Valyria-10004384-0 Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

Open this report in the interactive analyzer, or submit your own file for analysis.