Emotet Office (OLE) / .XLSX malware analysis — malicious · 2b35fa43a0029960

MALICIOUS

Office (OLE) / .XLSX

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

MD5: 879569c71a395340f554ea61b2f9741d SHA-1: acc49e86f50798d9b3ec79b3bed081928012a347 SHA-256: 2b35fa43a00299601791b8b76e39a3d71c593af8743383cbf0eee31ff320a5b0

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The sample is a malicious Excel document containing VBA macros, identified by ClamAV as 'Doc.Downloader.EmotetExcel02226-9938630-0'. The Workbook_Open macro utilizes CreateObject to interact with Wscript.Shell, indicating an attempt to download and execute a secondary payload. The obfuscated document body contains a long string that, when decoded, reveals multiple URLs likely serving as sources for this payload. The VBA script itself contains functions for manipulating worksheet data and deleting sheets, but the primary malicious intent appears to be the execution of external code.

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` `0682b1dabb01229c8492cae5e8f124b2428b3f7af0a3adfd56447b0856c75734`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	6592 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.