Emotet Office (OLE) / .XLSX malware analysis — malicious · e1408f7d53e5e5cb

MALICIOUS

Office (OLE) / .XLSX

125.2 KB Created: 2006-09-15 19:15:53 Authoring application: Microsoft Excel

MD5: 8a186205fa9b611387a8fd372b2f9716 SHA-1: 7961fc7e3f057ff8deae0a813b131aaf4a5ba219 SHA-256: e1408f7d53e5e5cb4c2192b8c8ec2cb67b576b1bc1f98ccbf64994c4fd6fa692

450 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File T1059.003 Windows Command Shell

The file is a macro-enabled Excel spreadsheet containing a fake invoice lure. The Auto_Open VBA macro is present and configured to execute automatically when the document is opened. Heuristics indicate the use of mshta.exe and WMI to launch processes, suggesting the VBA code downloads and executes a second-stage payload from the embedded URL http://91.240.118.172/ss/hh.html. ClamAV detection confirms this as Emotet.

Heuristics 12

LOLBin reference in VBA critical OLE_VBA_LOLBIN

LOLBin reference in VBA
VBA WMI Win32_Process launcher critical OLE_VBA_WMI_PROCESS_CREATE

VBA macro builds or references a WMI moniker for Win32_Process and invokes .Create to start a command. This is a high-confidence macro execution chain that often hides the WMI class name through string concatenation or helper functions.
ClamAV: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0
Reference to mshta.exe high SC_STR_MSHTA

Reference to mshta.exe
Auto_Open macro high OLE_VBA_AUTO

Auto_Open macro
GetObject call high OLE_VBA_GETOBJ

GetObject 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.
LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND

Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
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
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://91.240.118.172/ss/hh.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `bcbb44509bdb723596a5475460df5807276641c7860fa3733598b92dc2604030`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	10171 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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