Xls.Malware.Sload-7135989-0 RTF malware analysis — malicious · 586a1287fc1384e9

MALICIOUS

RTF

739.4 KB Created: 2018-07-13 12:08:00 First seen: 2019-05-16

MD5: 568c0520c2e1faff71e70372c52857f4 SHA-1: 57d318eea3e9e43887fbb3d120c6fe1f48681207 SHA-256: 586a1287fc1384e97026c55ed4d750dd7fac4b44f78cbd71a5dd44ba3db66eae

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_off00003cb3.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3CB3	24635 bytes
SHA-256: `83ffc4f548ac72e7bef0a9eb2fb2eaf14b15e5e4bc80583590146d8773e6c0c2`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_01_off000154f9.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x154F9	24635 bytes
SHA-256: `3142f2580dd73b4405fa2fbd32cb107fd38ae965eba9e6c1aea66826e30d2586`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_02_off00026d3f.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x26D3F	24635 bytes
SHA-256: `906941d428202f3379a19220103b2adca66e4a1653e8b4b3835be8bacbce8240`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_03_off00038585.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x38585	24635 bytes
SHA-256: `fa029f52432d76af524297ebfe69c541c5accfb18e42a4c82c3d3f764817bbb3`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_04_off00049dcb.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x49DCB	24635 bytes
SHA-256: `41b87d61a4b62cceb6f8903c0f07fcc60a725bb30a0fd7227ce7c35580348cb3`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_05_off0005c434.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x5C434	24635 bytes
SHA-256: `a50e93a442bfd6b421976513c6016b2be1e483afb97e2717c82a050590a931c9`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_06_off0006dc99.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x6DC99	24635 bytes
SHA-256: `9fb0e3592b1029095681be3ccb8f0fc5b9c6fb421133115daebf9ad2cea762d0`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_07_off0007f500.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x7F500	24635 bytes
SHA-256: `970f8d25f789ca5a9a01693774b88feba15fbb96b0bfe08a8dc01adee9037494`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_08_off00090d67.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x90D67	24635 bytes
SHA-256: `d764348d6fd200a6e7b39de2c407307828c120c47c93ea8c0475eb9ef543c8db`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely
`objdata_09_off000a25ce.bin`	rtf-objdata-decoded	RTF \objdata at offset 0xA25CE	24635 bytes
SHA-256: `3037a068fbc7adde172d71c7278342d3f9d3653b385d23a0ead89c78e856acb3`
Detection ClamAV: Xls.Malware.Sload-7135989-0 Obfuscation or payload: unlikely

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