Xls.Malware.Sload-7135989-0 RTF malware analysis — malicious · 806098afc2148dab

MALICIOUS

RTF

1022.4 KB Created: 2018-06-01 14:52:00 First seen: 2018-06-21

MD5: 8b54211cf8a4cd5621bef3464a4f74c3 SHA-1: 880fd320bf0b6dd749f0bc37d7d14027777b5aa3 SHA-256: 806098afc2148dabb838b24c4dfaa148269ac3ddf769aee54e75d46bfef0c506

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.Generic-6834349-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Malware.Generic-6834349-0
\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_off00003d14.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3D14	35899 bytes
SHA-256: `2b7c4143afe8f71aa7f88ea03184541a63be7a031412b8f9912ea368e4992dae`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_01_off0001ae2b.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x1AE2B	35899 bytes
SHA-256: `e0f24f6b38ae92acdbfa56b68ede4a3bcf2ce60fe52e8c5127fe28b0810afe6f`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_02_off00031f42.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x31F42	35899 bytes
SHA-256: `2643cae536117623162f4ba2ead9a6909299c0e41b77cf3740ffacfde4dd6450`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_03_off00049059.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x49059	35899 bytes
SHA-256: `1f0b2b210a19d4e740b08cee5ac20f4c90a0c88642213c444757d405d880a8dd`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_04_off00060170.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x60170	35899 bytes
SHA-256: `4751e58f661af9a84cca430f935659c8e6a7ced1895d7e4e6aab0301772eedf7`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_05_off0007728e.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x7728E	35899 bytes
SHA-256: `658f664d9dbe3c6362b2031c3d7d91fb3db5c9761deff4ee10ae8b034c733554`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_06_off0008e3a5.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x8E3A5	35899 bytes
SHA-256: `a5ef8c487f0f70d9bcca15de9f151f6d4057d44b4eb4d93f0395363fdad147c4`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_07_off000a54bc.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xA54BC	35899 bytes
SHA-256: `1bd8fb8a8a2b6949229bf91c65f869e45bb7e246c80285006400f6c6a26e4f28`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_08_off000bc5d3.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xBC5D3	35899 bytes
SHA-256: `294875e2e5490c32d32447fc755440a4d6773a440fce94656f5547677993a021`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely
`objdata_09_off000d36ea.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xD36EA	35899 bytes
SHA-256: `952fb2e78efee6a6a6c2885808c7f7464544ed5ff7f96611266077fc096d0118`
Detection ClamAV: Xls.Malware.Generic-6834349-0 Obfuscation or payload: unlikely

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