Emotet Office (OLE) / .XLSX malware analysis — malicious · da24b84079ed1998

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 6b8c2f7b90808e8ff91d92880212d737 SHA-1: 659114a20500d460a20f4f777f1e80a2a4a32982 SHA-256: da24b84079ed19987dc4a5e669c71814c8e2673c266178a2fdd8424f5453708d

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell T1059.005 Visual Basic T1204.002 Malicious File

The sample is identified as malicious by ClamAV with the signature 'Doc.Downloader.EmotetExcel02226-9938630-0'. The Workbook_Open VBA macro is designed to execute a batch file located at 'c:\programdata\jledshf.bat'. This batch file, in turn, uses 'wscript.shell' to execute a complex, obfuscated PowerShell command. The PowerShell command appears to be a downloader, attempting to fetch and execute payloads from multiple URLs, including 'http://activatedes.laforetlanguages.com/wp-admin/BlkDOKXJL/'. The VBA code also contains obfuscated strings that reconstruct URLs, such as 'https://www.parkinson.co.in/abc/Y6Y0fTbUEg6/', which are also included as IOCs.

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` `006c4f4d54d1c9bb906763adb0bd849cdbbe9d88f3fa78ad2d18ef6987f96c37`	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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