Xls.Dropper.Agent-7086958-0 — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 a371431701822921…

MALICIOUS

Office (OLE) / .XLS

155.5 KB Created: 2019-07-18 19:19:14 Authoring application: Microsoft Excel
MD5: aa2eb5ce8352128aa06b9ddf99fda160 SHA-1: cae262f2f84714b837e253b51b66214b10b12683 SHA-256: a371431701822921c1cb054e59737be2a9c81afb12da94630338a26410399928
320 Risk Score

Malware Insights

Xls.Dropper.Agent-7086958-0 · confidence 95%

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

The sample is identified as malicious by ClamAV as Xls.Dropper.Agent-7086958-0. High-severity heuristics indicate the presence of VBA macros, specifically a Workbook_Open macro that uses CreateObject and CallByName. This macro likely attempts to execute a command-line payload via cmd.exe, as suggested by the SC_STR_CMD heuristic. The embedded URLs are potential indicators of the second-stage payload's download location.

Heuristics 9

  • ClamAV: Xls.Dropper.Agent-7086958-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.Agent-7086958-0
  • Suspicious cmd.exe invocation with execution flag high SC_STR_CMD
    Suspicious cmd.exe invocation with execution flag
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • CallByName call high OLE_VBA_CALLBYNAME
    CallByName 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
  • 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://169.239.128.170/j1
    • http://t2.symcb.com0
    • http://tl.symcd.com0&
    • http://t1.symcb.com/ThawtePCA.crl0
    • http://tl.symcb.com/tl.crl0
    • https://www.thawte.com/cps0/
    • https://www.thawte.com/repository0W
    • http://tl.symcb.com/tl.crt0

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
a7e701134e4666141e613977c3d694f77fc7910883e9e838c73684f9f72bb86e		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3378 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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