Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 315e60a8bbfe2418…

MALICIOUS

RTF / .DOC

9.4 KB
MD5: 1e3f350635fa3f286d8c883e75161d53 SHA-1: f9388d59f7005f69617f5f16aa891fc54e60429c SHA-256: 315e60a8bbfe24189f56c19415bcdc602d44028a5073ebc07e474979993ccb27
180 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.001 PowerShell

The file is an RTF document containing an embedded OLE object that leverages the Equation Editor vulnerability (CVE-2017-11882). This vulnerability allows for arbitrary code execution upon opening the document. The ClamAV detection name confirms this exploit. The embedded OLE object likely contains shellcode to download and execute a secondary payload.

Heuristics 4

  • Equation Editor CLSID critical RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • ClamAV: Rtf.Exploit.CVE_2017_11882-6584355-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_11882-6584355-1
  • \objupdate forces OLE activation high RTF_OBJUPDATE
    RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000055.bin
89a364cdfd86d716876c1708d482f4549c73bb65dd5a5ec1be7cd9ef323be958
rtf-objdata-decoded RTF \objdata at offset 0x55 4684 bytes