Emotet Office (OLE) / .XLS malware analysis — malicious · 5033cb68dcc6515d

MALICIOUS

Office (OLE) / .XLS

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

MD5: c07e25fb1952d4db88112e923ac1e12e SHA-1: c18fb233bb4c337e1a6afcd2263de09ce5d5157a SHA-256: 5033cb68dcc6515d7495916c4e9e1f09f3a8cac25a333809135c893ee508d963

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The critical ClamAV detection and high-severity heuristics for VBA macros, including Workbook_Open and CreateObject, strongly indicate malicious intent. The embedded VBA script attempts to execute a batch file located at 'c:\programdata\jledshf.bat' and also contains a PowerShell command that decodes a Base64 string. This PowerShell command is responsible for downloading and executing a second-stage payload from multiple URLs, including 'http://chupahfashio.com/eh6bwxk/bowptl/xdAiC...'. The presence of the Workbook_Open auto-execution routine and the use of CreateObject to instantiate Wscript.Shell are classic Emotet delivery techniques.

Heuristics 7

ClamAV: Doc.Downloader.EmotetExcel02226-9938630-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.EmotetExcel02226-9938630-0
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` `e5cfab216070fe1e4cc99c114be1118111da457aa00152d1441ffb86ba5a4299`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	8906 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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