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

Static analysis result for SHA-256 656ba41e9e0738e5…

MALICIOUS

Office (OLE) / .XLS

690.0 KB Created: 2020-12-14 12:22:57 Authoring application: Microsoft Excel
MD5: ea04d9cb82ad3a167217c5b4fee546ad SHA-1: 3ff2574f31eccc3832d95169e1b9bee8ef92935f SHA-256: 656ba41e9e0738e50a42c31c58f17426aa5a928d0945397ec693882835e7582e
302 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1059 Command and Scripting Interpreter

The Excel file contains a Workbook_Open VBA macro that utilizes the Shell() function, indicating an attempt to execute external code. The macro's structure and the presence of packed content suggest it's designed to download and run a secondary payload. The ClamAV detection of 'Xls.Packed.Logan-9752153-0' further supports its malicious nature.

Heuristics 8

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Xls.Packed.Logan-9752153-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Packed.Logan-9752153-0
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • 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.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Suspicious extracted artifact info 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
f60e75ff146b222d873ec9624d373ac048b4060bcfca7ee5ba0256d8bd4ad240		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19484 bytes
ole10native_00.bin
fedcc68236cb10e87c67a7494b74bfcbc0a1115f3b2eb7f399546ae966ff4903		 ole-package OLE Ole10Native stream: MBD00241279/Ole10Native 437618 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.98, consistent with packed or encrypted content.

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