Emotet Office (OLE) / .XLS malware analysis — malicious · 2561c6a8a612bd98

MALICIOUS

Office (OLE) / .XLS

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

MD5: 216ffe1856bb0dc3726226ef6f3cd1b2 SHA-1: 15a8432b84adbf5d39995c3815e33bd052c5ba82 SHA-256: 2561c6a8a612bd980c3907628bcda654f0787288dcf2279947573ffe6820e7f7

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1105 Ingress Tool Transfer

The file contains VBA macros that are automatically executed upon opening the workbook, as indicated by the Workbook_Open heuristic and the OLE_VBA_PCODE_AUTOEXEC_EXEC firing. The script attempts to create a Wscript.Shell object to execute a batch file located at 'c:\programdata\jledshf.bat'. It also contains a heavily obfuscated string that reconstructs to multiple URLs, suggesting it downloads and executes a second-stage payload. The ClamAV detection name 'Doc.Downloader.EmotetExcel02226-9938630-0' strongly suggests the Emotet family.

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` `c49f2df77c50e10269216d97c3efdf7c32f9f18ba5d8fd42a9b144f48e100040`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	5709 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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