Xls.Malware.Sload-7135989-0 RTF malware analysis — malicious · 51c1f60ed10be433

MALICIOUS

RTF

843.3 KB Created: 2018-07-17 14:02:00 First seen: 2018-11-05

MD5: c8b0cd8ea14e32b828b0a6064d008c53 SHA-1: 7b0809745d71aeb6d327de91a7e61b94b76e418b SHA-256: 51c1f60ed10be433cfbbf275028cab0b46bc6194226f753caecf814ee6d49dfb

242 Risk Score

Malware Insights

Xls.Malware.Sload-7135989-0 · confidence 95%

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF file contains multiple OLE objects, with heuristics indicating ".objupdate" forces OLE activation and the presence of Composite Monikers. ClamAV signatures identify the embedded content as Xls.Malware.Sload-7135989-0, suggesting an exploit targeting spreadsheet functionality. The primary attack vector is likely spearphishing, with the embedded OLE object serving as the malicious payload.

Heuristics 6

Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED

RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
ClamAV: Xls.Malware.Sload-7135989-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Malware.Sload-7135989-0
\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 10 \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 In RTF body

Extracted artifacts 10

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00003c54.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3C54	27195 bytes
SHA-256: `2ffc25443e533e00d43819a97964a6f647b9abe41eaa80c91028140802f23ae7`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_01_off000168f5.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x168F5	27195 bytes
SHA-256: `1826de349952e059c2da784a86e03184f44cc2982c0a77710489e4bbedaed7ef`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_02_off00029596.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x29596	27195 bytes
SHA-256: `03679c106b3ec71ec70338fd927e1d4c753ded749c8147ef7a51b34c9e4f4956`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_03_off0003c237.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3C237	27195 bytes
SHA-256: `69390b708fb258c349fd1a3fc75773d965f6e83e02265b2ce0e62f4868c1f097`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_04_off0004eed8.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x4EED8	27195 bytes
SHA-256: `2fcdcb2044e134cc5ccef55d2dbaf21252809356eaf0f2499994c30ed7f806d1`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_05_off000693d6.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x693D6	27195 bytes
SHA-256: `e9a20c41bdc65ed5a61ecca13716012b403fa540e7a4cc89c4af7e2af549f505`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_06_off0007c098.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x7C098	27195 bytes
SHA-256: `f1a9d694e1f1d62938348f49da9463381b237dbf940cf18c4b7f2f7e9b08d243`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_07_off0008ed5a.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x8ED5A	27195 bytes
SHA-256: `9976a5ffa8ec8a83d48cd7bcba323db5d1d4d4829f648be90dce7cb6bd1248f9`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_08_off000a1a1c.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xA1A1C	27195 bytes
SHA-256: `c516b8670aa7c383b0e087e216113cbae668cff14872ad03fffbb10a0e798ae2`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_09_off000b46de.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xB46DE	27195 bytes
SHA-256: `d7da00ffb4293e7c14fd8c97dc1e6c6ed3b78dec1ba0b0f21b72b40f3bd9d4f1`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely

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