Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 cccd7abd248201a9…

MALICIOUS

Office (OLE) / .XLSX

136.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: b232cd9e51d05175b92470e1101e9234 SHA-1: 584fbd1a80758a4957845dfd4d19a65d3f7bb5d3 SHA-256: cccd7abd248201a9feef84c4732cc08bf16b86c5b8043826c4c3b5756efd85e2
280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The sample contains a Workbook_Open VBA macro that executes a VBScript payload from 'c:\programdata\tjspowj.vbs' and a batch file from 'c:\programdata\uidpjewl.bat'. The batch file contains obfuscated commands that appear to download additional payloads from the URLs 'http://aliveystem.com/eln-image/pm2rSsnVM/' and 'http://don-le.com/_notes/UH6H1'. The ClamAV detection name 'Doc.Downloader.EmotetRed02220-9938909-0' strongly suggests an Emotet family attribution.

Heuristics 7

  • ClamAV: Doc.Downloader.EmotetRed02220-9938909-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02220-9938909-0
  • 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
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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