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

Static analysis result for SHA-256 89bb5684705dc1b0…

MALICIOUS

Office (OLE) / .DOCX

45.0 KB Created: 2019-07-23 07:51:00 Authoring application: Microsoft Office Word
MD5: abcb94a9cdd3eec50cf19bcbe66a8845 SHA-1: dcd3292d880717effe248f7bc1fe45058f0b49a0 SHA-256: 89bb5684705dc1b0d7a4fbbf50f0b2ac539ff9de2fed5f36e4665dc68b513640
620 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1059.003 Windows Command Shell

The sample contains VBA macros that utilize WScript.Shell and cmd.exe to execute a suspicious URL. The AutoOpen macro and obfuscated shell command indicate an attempt to download and execute a second-stage payload from 'https://evangelia.edu/image/bin/Rjboi0.hta'. The presence of multiple high and critical heuristic firings related to VBA shell execution, LOLBins, and obfuscated commands supports this conclusion.

Heuristics 15

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • LOLBin reference in VBA critical OLE_VBA_LOLBIN
    LOLBin reference in VBA
  • 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.
  • Suspicious cmd.exe invocation with execution flag high SC_STR_CMD
    Suspicious cmd.exe invocation with execution flag
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Reference to mshta.exe high SC_STR_MSHTA
    Reference to mshta.exe
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • cmd.exe reference in VBA high OLE_VBA_CMD
    cmd.exe reference in VBA
  • 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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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://evangelia.edu/image/bin/Rjboi0.hta
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
0029725d2c192875017795b92a258d4ddbe85618c6554ce9b6bbeedeeb16e092		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1565 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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