Emotet Office (OLE) / .XLS malware analysis — malicious · a8dcf9709e665b02

MALICIOUS

Office (OLE) / .XLS

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

MD5: 52200689c375e3a690870cac945b6968 SHA-1: fd4f4db2613a40ea9c7d190a2a610d89c6a557ff SHA-256: a8dcf9709e665b02ec0057214be479ac3ab4b9dab6ad78b37f7929a9c0dadb32

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The sample is an Excel file containing a Workbook_Open VBA macro that executes a batch script. This script is designed to download and execute a second-stage payload from multiple URLs. The VBA code reconstructs the command to execute 'c:\programdata\jledshf.bat' and also contains obfuscated PowerShell commands that appear to be downloading payloads from several suspicious domains. The presence of Emotet-related heuristics and the ClamAV detection strongly indicate this 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` `e5cfab216070fe1e4cc99c114be1118111da457aa00152d1441ffb86ba5a4299`	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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