MALICIOUS
260
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The RTF document contains an embedded OLE object, identified as a package object, which in turn contains a PE header in hex data. ClamAV detections confirm this is a malicious trojan, specifically Win.Trojan.Cycler-241. The presence of an embedded executable within a document strongly suggests it was delivered via spearphishing, with the intent to exploit the user's trust to execute the payload.
Heuristics 6
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PE header (with DOS stub) in hex data critical RTF_MZ_HEXHex-encoded PE (MZ + DOS stub) found inside RTF — likely an embedded executable payload
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ClamAV: Win.Trojan.Cycler-241 critical CLAMAV_DETECTIONClamAV detected this file as malware: Win.Trojan.Cycler-241
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ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAVClamAV 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.
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Package object class high RTF_OBJCLASS_PACKAGEOLE Package object — can wrap arbitrary files
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OLE object data medium RTF_OBJDATARTF contains 1 \objdata section(s) — embedded OLE objects
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Embedded OLE object medium RTF_OBJEMBRTF contains \objemb — embedded OLE object
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off000000c3.binae702f73750cab0ba305e4bd50322738d7e46f9e609bd2c16998dfb8b9e88223 |
rtf-objdata-decoded | RTF \objdata at offset 0xC3 | 47883 bytes |
|
Detection
ClamAV:
Win.Trojan.Cycler-241
Obfuscation or payload:
unlikely
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