Emotet Office (OLE) / .XLSX malware analysis — malicious · 8f58f7271feb0dc6

MALICIOUS

Office (OLE) / .XLSX

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

MD5: b3b76accd7fa696cb4786aa6b9b2337c SHA-1: 19b88285188afc4f14346667ab484cdaaeee6bec SHA-256: 8f58f7271feb0dc62b8464d1a030ca65c6f029dac79b8bb9a2447618320231d2

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell T1059.005 Visual Basic

The sample contains a Workbook_Open macro that utilizes Wscript.Shell to execute obfuscated commands. The script reconstructs the path 'c:\programdata\jledshf.bat' and executes it. It also attempts to execute 'c:\windows\syswow64\run.exe c:\programdata\vbkwk.dll,dfsgeresd'. The embedded VBA code also contains a long string that appears to be a list of URLs, reconstructed as 'http://aiShyana.com/wp-admin/6pY001tdOxY10/,https://ncikjeja.com/bacc/lO46QUEiVanm/,https://mail.themintonlist.com/wp-incluedes/S5xbjWOwM75ysw9xaM/,https://karaah.com/kvxqec/L8mXjKJN95uoFQdSL/,https://mail.terinhumprey.com/wp-incluedes/S5xbjWOwM75ysw9xaM/'. This indicates a downloader functionality, consistent with 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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