Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 92299cd3084e238d…

MALICIOUS

RTF / .DOC

9.3 KB First seen: 2022-08-31
MD5: 604eaa2c54c452399d03578b391cc5f2 SHA-1: 79f91b1ca0a1ff216babfb31153a16c594749429 SHA-256: 92299cd3084e238d6ed5506abb741cce3603ec7e00c1388387a7101d596a1bf4
80 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1566.002 Phishing: Spearphishing via Service

The sample is an RTF document that contains OLE object data and uses an \objupdate directive to force OLE activation. It also employs a content-enable lure, instructing the user to enable editing to view the document. This combination of techniques strongly suggests a malicious document designed to trick users into enabling content that would likely lead to further malicious activity, such as downloading a second-stage payload.

Heuristics 3

  • \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 2 \objdata section(s) — embedded OLE objects
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000015e2.bin
3d6a54a9fcab633fcc2b8e2142807993206c233160848e96e95e02dc579164d3
rtf-objdata-decoded RTF \objdata at offset 0x15E2 1371 bytes