Office (OLE) / .XLSX malware analysis — malicious · 4e0770c715b9e8fc

MALICIOUS

Office (OLE) / .XLSX

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

MD5: f68638438132417ce28ad0ccc9b2bb9d SHA-1: 63e3e85dae9bb6e3d65aae62c353337577077388 SHA-256: 4e0770c715b9e8fc4bfd543475862850a0ecc56b505a5661c0f112191c2d6e2d

280 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample contains VBA macros, specifically a Workbook_Open macro, which is a common technique for executing malicious code upon opening the document. The script utilizes `CreateObject` to instantiate `Wscript.Shell`, which is then used to execute two files: 'yhjlswle.vbs' and 'ughldskbhn.bat', both located in 'c:\programdata\'. The script also attempts to download additional content from a list of URLs, indicating a downloader functionality. The presence of `Wscript.Shell` and the execution of batch and VBScript files point towards the use of Windows scripting host for payload delivery and execution.

Heuristics 7

ClamAV: Doc.Downloader.EmotetRed02220-9938909-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.EmotetRed02220-9938909-0
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` `7a075e02dc1e88807280b9b84946715e79a3c091d50391301434649c77b78ea1`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	12808 bytes
Detection ClamAV: No threats found 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.