MALICIOUS — 3dbc051e39388c63bf4b1c35cd54ccc62745464feae42cf8755d57c401ecf5ba.js

MALICIOUS — 3dbc051e39388c63bf4b1c35cd54ccc62745464feae42cf8755d57c401ecf5ba.js is a script sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (93/100), attributed to the RemcosRATt family. 3 of 51 detection engines flagged it, exhibiting 1 ATT&CK technique.

Identification

• SHA-256: 3dbc051e39388c63bf4b1c35cd54ccc62745464feae42cf8755d57c401ecf5ba
• SHA-1: 936f8bac3b75e2898d06526d37dc9e68dc62f2bb
• MD5: ea8f03c93bacf4f1d2afc259e2073c8f
• ssdeep: 98304:p2jcT4REiQcnmJhS260+Dep/B8DBV+LJVNxnM08cPAD/QsMdcg30eLRWx8T4g+ss:r4RhQcm2ND4/Bc7+LfnMzkAD/QVP30eu
• TLSH: T1BF6429F3575F73DDECDE9901D7E4A63681A8F6AC207EE421010F00ABBE606C47AA1156
• Submitted as: 3dbc051e39388c63bf4b1c35cd54ccc62745464feae42cf8755d57c401ecf5ba.js
• File type: script · Size: 5311591 bytes
• Verdict: malicious (93/100) · Family: RemcosRATt

Source: MalwareBazaar · first seen 2026-07-27T00:00:00.000Z · SHA-256 verified

Detections (3 of 51 engines)

• Microsoft Defender: Trojan:JS/RemcosRATt.SB!MTB
• Emsisoft (Emergency Kit): Trojan.Generic.40338796
• Kaspersky (KVRT): HEUR:Trojan.Script.Generic

MITRE ATT&CK

• T1105

Why this verdict

The malicious score of 93/100 is the fusion of 6 weighted signals:

• Microsoft Defender flagged Trojan:JS/RemcosRATt.SB!MTB (rule Trojan:JS/RemcosRATt.SB!MTB) - engine signal, weight 0.55, confidence 0.85
• Emsisoft (Emergency Kit) flagged Trojan.Generic.40338796 (rule Trojan.Generic.40338796) - engine signal, weight 0.55, confidence 0.85
• Obfuscated javascript script: dynamic-exec (rule script-deobfuscation) - static signal, weight 0.55, confidence 0.75
• 1 behavioral detection(s): Remote payload download (wget/curl) [medium] (rule tl-linux-download-cradle) - dynamic signal, weight 0.40, confidence 0.90
• Anti-analysis: T1497 - dynamic signal, weight 0.40, confidence 0.75
• Contacted 12 external host(s) at runtime - network signal, weight 0.12, confidence 0.55

Dynamic analysis (linux)

878 behavior events · 0 ATT&CK techniques · 1 dropped files.

Runtime network

• entropy.ubuntu.com
• desktop-hsgcbep
• 2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa
• 3.0.0.0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa
• 252.0.0.224.in-addr.arpa
• b.f.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa
• 250.255.255.239.in-addr.arpa
• ntp.ubuntu.com
• 185.125.189.53:443
• 10.240.0.1
• 74.179.71.159
• ff02::1:3
• 224.0.0.252
• 10.240.0.255
• 224.0.0.251
• ff02::fb
• 91.189.91.157
• 74.179.77.204
• 185.125.190.57
• 239.255.255.250

Dropped files

• tmp_tmp.YSI31KUYVF - 4174c8140e8b79a1409ca63bfe2a9202808df2b01260e9e968e6760cd7f56e2e

Embedded IP addresses

• 74.179.71.159
• 74.179.77.204
• 172.215.188.232
• 20.42.179.192
• 40.126.14.161
• 48.211.4.16
• 203.26.79.13

More RemcosRATt samples · Latest analyzed threats · ATT&CK coverage

Analyzed on MalwareAnalyzer by Cyble · Open interactive report