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

Static analysis result for SHA-256 35e9fe54d350b9c1…

MALICIOUS

Office (OLE) / .XLS

15.5 KB
MD5: 091c8aadf93095095e8f100162a9610d SHA-1: 1049687460f266fd456093f9f7741c2e02cc92f8 SHA-256: 35e9fe54d350b9c1a5a58d6f08e96704e0065665622f350ae7fc56a0d2311c94
460 Risk Score

Malware Insights

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

The sample contains a Workbook_Open VBA macro that utilizes WScript.Shell and CreateObject to execute obfuscated code. This code is designed to download and execute a second-stage payload from the embedded URL 'https://cia.tf/2ed7362e959d42385d4e6d231a6840dd.exe'. The ClamAV detection 'Doc.Dropper.Agent-6412232-1' further confirms its malicious nature as a dropper.

Heuristics 11

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • Obfuscated VBA Shell command with URL critical OLE_VBA_OBFUSCATED_SHELL_URL
    VBA macro invokes Shell with command text assembled through decoder or string-manipulation functions and includes a URL. This is a high-confidence downloader/dropper pattern, stronger than Shell or URL evidence on their own.
  • ClamAV: Doc.Dropper.Agent-6412232-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6412232-1
  • 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
  • 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 https://cia.tf/2ed7362e959d42385d4e6d231a6840dd.exe

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
3be71b0d18722d5a4f9a7222074f492c59d1f62f11646043db163e8306f24495		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1280 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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