Emotet Office (OLE) / .XLSX malware analysis — malicious · 880d7aa43af33230

MALICIOUS

Office (OLE) / .XLSX

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

MD5: e8a550c0698083b95674f76e49917285 SHA-1: d781fc3f5cd4620f4a7cf0c154edce60689ccf75 SHA-256: 880d7aa43af3323086ca196feedb67e39de053ed1466bf2214f91c33e6b63f61

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File T1105 Ingress Tool Transfer

The critical ClamAV detection and high-severity heuristics for VBA macros, Workbook_Open, CreateObject, and p-code auto-execution indicate a malicious macro-based document. The Workbook_Open subroutine likely triggers the execution of a VBScript payload, as evidenced by the 'wscript.shell' and 'rds.dataspace' objects and the creation of 'tjspowj.vbs' and 'uidpjewl.bat' files in the ProgramData directory. The bat file contains obfuscated commands that appear to download and execute payloads from multiple URLs. The reconstructed URL string is 'http://youlanda.org/eln-images/n8DPZISf/,http://roservideob.net/eln-images/EjdcOMlY8Gy/,http://vbaint.com/eln-images/H2pPGte8XzENc/,https://framemakers.us/eln-images/U5W2IGE9m8i9hr/,http://niplaw.com/asons/JO5/,http://roberflod.us/eln-images/DGI2YOkw9XPO/,http://mpmcomputing.com/fonts/JO5/'.

Heuristics 7

ClamAV: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0
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` `faf50200d5a9adeeda00cc1da1bbf8f6abf0317a1e97a58db8ae804ba12ba446`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	13985 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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