Emotet Office (OLE) / .XLS malware analysis — malicious · a573ab81e079aa0e

MALICIOUS

Office (OLE) / .XLS

142.5 KB Created: 2006-09-28 05:33:49 Authoring application: Microsoft Excel

MD5: 60f91c20bc2c5b90aac3e9bde93b816b SHA-1: 7865b7d067d2b1477d4c68b7bf5f5aa77d133ab4 SHA-256: a573ab81e079aa0e33e7b67a032f07dbca96c913c91aba792c62348c53be86da

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The file is identified as malicious by ClamAV with a signature indicating it's an Emotet downloader. The Workbook_Open VBA macro is configured to execute immediately upon opening. It uses Wscript.Shell to create and execute a batch file located at 'c:\programdata\rtyusdj.bat'. The script also contains a long, obfuscated string that appears to be a concatenation of multiple URLs, likely serving as the source for the second-stage payload. The presence of Wscript.Shell and the auto-executing macro strongly suggest a downloader functionality.

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` `ffa342a8bb4eb541fe833e6254cf3f6e2f7d6f5436c011440a061030b6684f64`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	6473 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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