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

Static analysis result for SHA-256 99811775df40b998…

MALICIOUS

Office (OLE) / .XLS

844.0 KB Created: 2021-05-19 14:26:43 Authoring application: Microsoft Excel
MD5: 8cd09ba1a0a1c52115e5419c92342708 SHA-1: 81f9babe5f301a409b33ac7db3255cdc8d94ec85 SHA-256: 99811775df40b9988040f787af520531714fe8fbce7139886843b96fbb20cb4b
290 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 Command and Scripting Interpreter T1071.001 Application Layer Compromise T1566.001 Phishing T1071.002 Remote Services - SMB/Windows T1071.003 Remote Services - Web Service T1071.005 Remote System Discovery

The file exhibits several indicators of malicious activity, including the presence of VBA macros, WScript.Shell usage, and the creation of COM objects. The `Workbook_Open` macro triggers the execution of a malicious script, likely for downloading and executing a secondary payload. The embedded URLs point to potentially compromised or malicious websites, suggesting a delivery mechanism involving phishing or drive-by downloads. The auto-execution token within the VBA stream further confirms the intent to execute code upon document opening.

Heuristics 9

  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • 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
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — context-specific rules above attribute URLs they actually evaluated; this rule lists URLs that were present in the bytes but were not otherwise tied to a specific finding.
    URL https://market-in.org/wp-content/uploads/2020/06/H4RiD4lTF.php
    • https://agentsv2.ivm.mv/user_guide/_static/css/rjWMenNTq.php
    • https://sklep.northserwis.pl/fckeditor/editor/dialog/common/images/239x8XnABbK.php
    • https://coeniglich.de/oVWjOr1Z3Z.php
    • https://akachi.co.za/uJPPYNmRbBCB8fm.phpeuc+\D7euc+\D7
    • https://mail-call.us/76a7Sg6AAZRX.phpUT\.f8
    • https://aims1.ezicodes.com/wp-i[sh�
    • https://fate.sa/2EWZ1gzKbk.php(IF|&
    • https://newzroot.com/wp-content/themes/_
    • https://creatalca.cl/nacionprogresiva/wp-includes/css/dist/block-directory/3pHa6HkTHtTkK.php!-qdpDWelm
    • https://aims1.ezicodes.com/wp-includes/js/tinymce/skins/lightgray/A2jVIUfifA7zwR.php=KWQS2n3:AI*T
    • https://newzroot.com/wp-content/themes/sahifa/css/ilightbox/otlDh6Ov4gImZ0t.php87Q

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
58ea5cc307fbaa7f3959ba70e4a27a425d7fe4e91f5792201b47b107d87e35d2		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 132420 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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