Malicious Office (OLE) / .XLS — malware analysis report

Static analysis result for SHA-256 dac37dc57de67d7b…

MALICIOUS

Office (OLE) / .XLS

70.0 KB Created: 2020-03-10 12:39:23 Authoring application: Microsoft Excel
MD5: 28c85d6373eb55d8b5c0c664a36ef039 SHA-1: bd3d501d1e5e9e1517c9ff36d40bfcdedc5ba94c SHA-256: dac37dc57de67d7bb8d80bfd5a7a7f088c70443e18991c9f4a3ea33e0cd90899
300 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Service Execution: Visual Basic T1059.003 Command and Scripting Interpreter: Windows Command Shell

The file contains VBA macros that utilize WScript.Shell and the Shell() function, indicating an attempt to execute arbitrary commands. The ClamAV detection 'Xls.Dropper.Agent-7625932-0' further supports its malicious nature as a dropper. The presence of these elements suggests the macro is designed to download and execute a second-stage payload.

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-7625932-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.Agent-7625932-0
  • 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
34a58686e8ae65f117944447e54caa2018c82319c568a93e841a0befa0c53ac0		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2621 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s).

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