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

Static analysis result for SHA-256 8366581c798a02d8…

MALICIOUS

Office (OLE) / .XLS

118.0 KB Created: 2021-04-13 13:37:17 Authoring application: Microsoft Excel
MD5: f9c68160d893ed707b7d2ed9462c513d SHA-1: bb12f776f0110f3f677c6bf81823844225d350f3 SHA-256: 8366581c798a02d81cafa7983f7f77108c91f8ede2171793934bb1b5b71bf459
362 Risk Score

Malware Insights

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

The Workbook_Open VBA macro is designed to execute a command that downloads a file from http://209.141.61.124/Q-2/IMG_61_023_088.ex and saves it as C:\Users\Public\Documents\religiousthere.ex. The macro then executes the downloaded file, indicating a downloader or dropper functionality. The use of WScript.Shell and obfuscated strings points to a deliberate attempt to conceal the malicious activity.

Heuristics 9

  • 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.
  • 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
  • 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://209.141.61.124/Q-2/IMG_61_023_088.ex

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
0355d9a7a9642616b730a0383a85efcbc57bda43305a68c5103b72107d9ac94a		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1126 bytes

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