Win.Dropper.Agent-211918 — RTF malware analysis

Static analysis result for SHA-256 b3a427898ed47e66…

MALICIOUS

RTF

103.8 KB Created: 2010-03-24 10:48:00
MD5: a07543237c283d2095f295febe90ddd5 SHA-1: 6723630f449b695d9733c5ea981956187e33e769 SHA-256: b3a427898ed47e66172105ffb3a859efa8eb40251d24b85d09cc23ed1d453cbb
260 Risk Score

Malware Insights

Win.Dropper.Agent-211918 · confidence 95%

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF file contains an embedded OLE object, which in turn contains PE header data. ClamAV signatures identify this as Win.Dropper.Agent-211918, indicating it likely functions as a dropper for other malicious payloads. The presence of OLE objects and PE headers within the RTF strongly suggests a malicious intent to deliver secondary malware.

Heuristics 7

  • PE header (with DOS stub) in hex data critical RTF_MZ_HEX
    Hex-encoded PE (MZ + DOS stub) found inside RTF — likely an embedded executable payload
  • ClamAV: Win.Dropper.Agent-211918 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Dropper.Agent-211918
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Package object class high RTF_OBJCLASS_PACKAGE
    OLE Package object — can wrap arbitrary files
  • 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
  • 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 http://schemas.microsoft.com/office/word/2003/wordml

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000026a1.bin
e066c4e529aaf5431ea3538e4a01a27eb345e83048b425eedf7162faa09c9d71
rtf-objdata-decoded RTF \objdata at offset 0x26A1 33604 bytes
Detection
ClamAV: Win.Dropper.Agent-211918
Obfuscation or payload: unlikely