MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 e4ea8cf8a2e43d1b648d47bde042e7f9fe486b2dc96cbbc987b1cba2b6440715. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


Efimer


Vendor detections: 8


Intelligence 8 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: e4ea8cf8a2e43d1b648d47bde042e7f9fe486b2dc96cbbc987b1cba2b6440715
SHA3-384 hash: 0b232bc69e383200555ffd1e6fa6b45211c44df3895c6319cf7e6b57d8fa1791b7c0d665c54ad6de1357d23d777d227d
SHA1 hash: ab04505aa6e3920a7166df509cf227d41e134063
MD5 hash: abf5e29d7d882dcfdf77aabbe1510b3c
humanhash: bravo-pip-coffee-salami
File name:ucase.js
Download: download sample
Signature Efimer
Create hunting rule
File size:42'512 bytes
First seen:2026-04-29 19:14:00 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 768:uIskHLalRwwuzUY7oWXvIZNCrckC7lrvFaUWo6SOTjBf9HZAT02NjylWM1c5hQC:PrP4Y71QvCrct7lLFJ6Suf95AVByc5B
TLSH T12F139D65B70019A48F768EE5C264C7D097487DBA4DCDB5C8EF883350198BAB5CDEE0B4
Magika javascript
Reporter BastianHein
Tags:Efimer js

Intelligence

File Origin
# of uploads :
1
# of downloads :
103
Origin country :
CL CL
Vendor Threat Intelligence
No detections
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
anti-vm encrypted fingerprint obfuscated repaired
Link:
https://www.filescan.io/uploads/69f2588f2fcb905ec2737faa/reports/7199d2bf-2113-4e2e-a36b-e6b10bcbc048/overview
Verdict:
Malicious
Labled as:
GT:JS.Acsogenixx.3373
Link:
https://www.hybrid-analysis.com/sample/e4ea8cf8a2e43d1b648d47bde042e7f9fe486b2dc96cbbc987b1cba2b6440715
Verdict:
Malicious
File Type:
js
First seen:
2026-04-29T16:19:00Z UTC
Last seen:
2026-04-29T19:47:00Z UTC
Hits:
~10
Detections:
HEUR:Trojan.Script.Generic HEUR:Trojan-Spy.Script.Efimer.gen
Link:
https://opentip.kaspersky.com/e4ea8cf8a2e43d1b648d47bde042e7f9fe486b2dc96cbbc987b1cba2b6440715/results?tab=lookup
Score:
100%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/e4ea8cf8a2e43d1b648d47bde042e7f9fe486b2dc96cbbc987b1cba2b6440715
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/e4ea8cf8a2e43d1b648d47bde042e7f9fe486b2dc96cbbc987b1cba2b6440715/
Verdict:
Malicious
Threat:
Trojan-Spy.Script.Efimer
Link:
https://tip.neiki.dev/file/e4ea8cf8a2e43d1b648d47bde042e7f9fe486b2dc96cbbc987b1cba2b6440715
Threat name:
Script-JS.Spyware.Acsogenixx
Create hunting rule
Status:
Malicious
First seen:
2026-04-29 19:14:32 UTC
File Type:
Text (JavaScript)
AV detection:
7 of 24 (29.17%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=4tviz6fc4q6rwzeni666aqxh7h7eq2znzfwlxsmhwhf2fnsea4kq._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
execution
Link:
https://tria.ge/reports/260429-xxsrgafs6z/
Behaviour
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: JavaScript
Enumerates physical storage devices
Checks computer location settings
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.35
Link:
https://yomi.yoroi.company/submissions/e4ea8cf8a2e43d1b648d47bde042e7f9fe486b2dc96cbbc987b1cba2b6440715

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:SUSP_obfuscated_JS_obfuscatorio
Create hunting rule
Author:@imp0rtp3
Description:Detect JS obfuscation done by the js obfuscator (often malicious)
Reference:https://obfuscator.io

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Comments