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

Static analysis result for SHA-256 49e109a4d9fa02c0…

MALICIOUS

Office (OLE) / .XLS

122.0 KB
MD5: 98523315b7827b8ce780b1ed63f11aa7 SHA-1: ed07521b2a41ec4b792486d18221576ba231466e SHA-256: 49e109a4d9fa02c06e9473ee72a3754cfc34591366add7936113dcd6258a8051
340 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample is an XLS file containing a Workbook_Open macro that utilizes a Shell() call. This macro is designed to execute arbitrary commands, likely to download and run a second-stage payload. The presence of a clipboard command execution lure further suggests an attempt to manipulate the user into running commands. The ClamAV detection points to a known dropper family.

Heuristics 8

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Xls.Dropper.Fajan-9852005-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.Fajan-9852005-0
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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
be06a6c3e3589423369d8a50a6edbe01f6b11fc6fa8f0c7544dea16c0d9bb55b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1050 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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