Xls.Malware.Sload-7135989-0 RTF malware analysis — malicious · 6339123b98d3c871

MALICIOUS

RTF

789.7 KB Created: 2018-07-17 14:21:00 First seen: 2019-04-18

MD5: 2370ff86c88a8695999e657961306f04 SHA-1: 701c3847fbbd4ca12f079598a9e134603cc3659f SHA-256: 6339123b98d3c871898c79b5a5fc5358835a796bb8ea0679f49e61c501e5bfb6

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_off00003c40.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3C40	27195 bytes
SHA-256: `64cd8c7daa9dc90d895ec1f7e574508247c23ac2da7722ae9d8803cb2aa9c34c`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_01_off000168b0.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x168B0	27195 bytes
SHA-256: `ee9b6141750698d5ad48c7532288973a2ae2b5e4ecfc5455e2b3637a29f39754`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_02_off00029520.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x29520	27195 bytes
SHA-256: `55be05eae1578f365ae7c96d0aea6973467fc7ea5373f19c34768647bdbb95a3`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_03_off0003c190.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3C190	27195 bytes
SHA-256: `4a407b4b0602cbeeb142d498e22fdbada23f012ad8d85fb047d93a844d08e196`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_04_off0004ee00.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x4EE00	27195 bytes
SHA-256: `d10eee1c58bc9888af4c8427d60c9605eeac269b3083308b055f4d48cf73edb4`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_05_off0006288c.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x6288C	27195 bytes
SHA-256: `d30322531f6e1c3821517d756f98fe2965ca3af828cf3ee9b078a58ca382a7ca`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_06_off0007551a.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x7551A	27195 bytes
SHA-256: `d2aec1474fec508a4aaf7c65433027340e8ecb1d6512795a95fc8c48421b6a71`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_07_off000881aa.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x881AA	27195 bytes
SHA-256: `f076c24072741728c37142adf89e0de101e05c5e989cc3f4745ea19e653ab3b0`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_08_off0009ae3a.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x9AE3A	27195 bytes
SHA-256: `bcd928b38e4ee62b5bf18af0641b7a91520f72f483121162e6ac2c43ff1425df`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_09_off000adaca.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xADACA	27195 bytes
SHA-256: `eaada0f14bea56ae0c67b91e288589a7ccc86bd580fc0b8cb4cb6330ffdc8355`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely

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