Xls.Dropper.Agent-7677024-0 — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 e47fcadc1cd80f50…

MALICIOUS

Office (OLE) / .XLS

63.5 KB Created: 2020-04-14 08:42:37 Authoring application: Microsoft Excel
MD5: cec222374209edd0793cc79714510f06 SHA-1: ec26523ba451d892c22c92c4335d6540ce625b41 SHA-256: e47fcadc1cd80f50a4be9f377f0a71ac4100c383569d766d0d69f0018917aed6
300 Risk Score

Malware Insights

Xls.Dropper.Agent-7677024-0 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1059.001 PowerShell T1204.002 Malicious File T1105 Ingress Tool Transfer

The file is an XLS document containing VBA macros. Heuristics indicate the use of WScript.Shell and the Shell() function, suggesting the execution of external commands or scripts. The ClamAV detection name 'Xls.Dropper.Agent-7677024-0' strongly implies a dropper functionality. The embedded 'macros.bas' file likely contains the malicious script responsible for downloading and executing a second-stage payload, a common tactic for droppers.

Heuristics 7

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • ClamAV: Xls.Dropper.Agent-7677024-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.Agent-7677024-0
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Suspicious extracted artifact medium 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
d4cf269117564a9b19daedf1ce2753fbbcdaa8c8342e9ee8a6f8055bc679edfd		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1387 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s).

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