Emotet — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 b82f15b6da7b3034…

MALICIOUS

Office (OLE) / .XLS

142.5 KB Created: 2006-09-28 05:33:49 Authoring application: Microsoft Excel
MD5: 36f64f6024b31b9c8a32dc65dd86a62d SHA-1: 9dd744f8d1341affb0c476940315777756400a98 SHA-256: b82f15b6da7b303484eff04a7483030e22fbe5e047f081378d2ce299c1e95cf5
280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic

The critical ClamAV detection and high-severity heuristics for VBA macros, Workbook_Open execution, and CreateObject calls strongly indicate a malicious document. The VBA script utilizes Wscript.Shell to execute a batch file and appears to download additional payloads from multiple URLs. The reconstructed URL string is: "http://rkeprua.com/inclube/FBXbsVAOd1UV/ ,http://pozhadvokt.com/images/QmZXA9kRU8XZFZ/ ,http://queueens.renovatio.ltd/wp-includes/LAH/ ,http://renovatingmarketing.com/reno/ ,http://remedy.eventmas.com/veapn/lpN6dcAppn/ ,http://pcbdsmab.insanrabany.sch.id/gkvb/sXVYo8HsPSFQh/ ,http://pinna-homes.net/870xg9/pNp3a1iHCKaZwYE/ ,http://dandtremierhomes.com/eapn/lpN6dcAppn/". The presence of 'Wscript.Shell' and 'CreateObject' points to the execution of external commands and scripts, characteristic of Emotet's downloader functionality.

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.

FilenameKindSourceSize
macros.bas
ffa342a8bb4eb541fe833e6254cf3f6e2f7d6f5436c011440a061030b6684f64		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6473 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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