Emotet Office (OLE) / .XLS malware analysis — malicious · a020f9c7526230b5

MALICIOUS

Office (OLE) / .XLS

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

MD5: 1c81b40b8e17cc38c9a61701fb9b747b SHA-1: afeb18def1501ff4563981cbdca1dcb1916f5546 SHA-256: a020f9c7526230b521e6ad523ebe7e5961130c3be69b6cc4103de81dd0d81071

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The file is identified as malicious by ClamAV and exhibits high-severity heuristics related to VBA macros and Wscript.Shell usage. The Workbook_Open macro is present, indicating automatic execution upon opening. The script constructs a complex command string using concatenation, which appears to be a downloader for a second-stage payload. The reconstructed command includes multiple URLs, suggesting a fallback mechanism for downloading the payload. The presence of 'Wscript.Shell' and the construction of a command line point to the execution of arbitrary 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` `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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