MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f5e91e4b571064697aa93b0ea78a956b8602261dfabeb13f2352b296d07c7cb3. 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


GuLoader


Vendor detections: 9


Intelligence 9 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f5e91e4b571064697aa93b0ea78a956b8602261dfabeb13f2352b296d07c7cb3
SHA3-384 hash: bd9f2407ce6b916e4bb5bde9bf1b5be8cc05d117cdddd7245123f234794e377ca0f5913f403ef20762755235ab82b8d1
SHA1 hash: efbb3d2163b1ebdfbcf7b0e2fe6466f1f2440c53
MD5 hash: c82de3fbe4b3c9928a755a266cf579f3
humanhash: alaska-double-lake-early
File name:Slibemas.js
Download: download sample
Signature GuLoader
Create hunting rule
File size:13'999 bytes
First seen:2026-07-14 10:13:34 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 384:DOyuEkgh8fT2qwtDoZocy1ucAkSab9QgiLyX51Rp8Uom2Tnu:DOyuEkgh8fT2qwtDoZk1ucAkSahQgiLu
TLSH T12152C95ED1FA20D845B13F89DE23586784ADC12FCD72F924D29BF133BA6116482E3627
Magika javascript
Reporter abuse_ch
Tags:GuLoader js

Intelligence

File Origin
# of uploads :
1
# of downloads :
155
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Detection(s):
SecuriteInfo.com.Script.SNH-gen.35754722.UNOFFICIAL
Create hunting rule

Verdict:
Clean
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a560cca56bd89099b553601
Tags:
n/a
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
fingerprint repaired
Link:
https://www.filescan.io/uploads/6a560cc2291704fba169f154/reports/05a967a6-e19e-4c0d-9a12-1d74d62ad4f9/overview
Verdict:
Malicious
Labled as:
GT:JS.Acsogenixx.4320
Link:
https://www.hybrid-analysis.com/sample/f5e91e4b571064697aa93b0ea78a956b8602261dfabeb13f2352b296d07c7cb3
Verdict:
Malicious
File Type:
js
First seen:
2026-07-14T06:28:00Z UTC
Last seen:
2026-07-15T12:23:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/f5e91e4b571064697aa93b0ea78a956b8602261dfabeb13f2352b296d07c7cb3/results?tab=lookup
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
evad.troj
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1942080
Signature
Antivirus / Scanner detection for submitted sample
Found suspicious powershell code related to unpacking or dynamic code loading
Hides threads from debuggers
Injects code into the Windows Explorer (explorer.exe)
Joe Sandbox ML detected suspicious sample
JScript performs obfuscated calls to suspicious functions
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Obfuscated command line found
Sigma detected: WScript or CScript Dropper
Switches to a custom stack to bypass stack traces
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
WScript reads language and country specific registry keys (likely country aware script)
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1942080 Sample: Slibemas.js Startdate: 14/07/2026 Architecture: WINDOWS Score: 100 36 drive.usercontent.google.com 2->36 38 drive.google.com 2->38 48 Malicious sample detected (through community Yara rule) 2->48 50 Antivirus / Scanner detection for submitted sample 2->50 52 Multi AV Scanner detection for submitted file 2->52 54 4 other signatures 2->54 8 wscript.exe 1 2 2->8         started        12 powershell.exe 15 2->12         started        14 explorer.exe 4 10 2->14         started        16 rundll32.exe 2->16         started        signatures3 process4 file5 34 C:\Users\user\AppData\Local\Hemi, ASCII 8->34 dropped 56 JScript performs obfuscated calls to suspicious functions 8->56 58 Injects code into the Windows Explorer (explorer.exe) 8->58 60 Windows Scripting host queries suspicious COM object (likely to drop second stage) 8->60 62 WScript reads language and country specific registry keys (likely country aware script) 8->62 18 explorer.exe 8->18         started        64 Writes to foreign memory regions 12->64 66 Found suspicious powershell code related to unpacking or dynamic code loading 12->66 68 Hides threads from debuggers 12->68 70 Switches to a custom stack to bypass stack traces 12->70 21 conhost.exe 12->21         started        23 backgroundTaskHost.exe 12->23         started        25 backgroundTaskHost.exe 12->25         started        27 backgroundTaskHost.exe 12->27         started        72 Obfuscated command line found 14->72 29 powershell.exe 17 14->29         started        signatures6 process7 dnsIp8 44 Obfuscated command line found 18->44 40 drive.usercontent.google.com 142.250.188.1, 443, 49711 GOOGLE-GoogleLLCUS United States 29->40 42 drive.google.com 142.251.211.174, 443, 49709 GOOGLE-GoogleLLCUS United States 29->42 46 Found suspicious powershell code related to unpacking or dynamic code loading 29->46 32 conhost.exe 29->32         started        signatures9 process10
Score:
100%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/f5e91e4b571064697aa93b0ea78a956b8602261dfabeb13f2352b296d07c7cb3
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f5e91e4b571064697aa93b0ea78a956b8602261dfabeb13f2352b296d07c7cb3/
Threat name:
Script-JS.Trojan.Acsogenixx
Create hunting rule
Status:
Malicious
First seen:
2026-07-14 10:22:45 UTC
File Type:
Text (JavaScript)
AV detection:
11 of 38 (28.95%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=6xur4s2xcbsgs6vjhmhkpcuvnodaejq57k7lcpzdkkzjnud4pszq._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
adware discovery execution spyware
Link:
https://tria.ge/reports/260714-ma5seaax8n/
Behaviour
Suspicious use of WriteProcessMemory
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Command and Scripting Interpreter: JavaScript
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of NtSetInformationThreadHideFromDebugger
Contacts third-party web service commonly abused for C2
Drops desktop.ini file(s)
Checks computer location settings
Badlisted process makes network request
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.75
Link:
https://yomi.yoroi.company/submissions/f5e91e4b571064697aa93b0ea78a956b8602261dfabeb13f2352b296d07c7cb3

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:Sus_CMD_Powershell_Usage
Create hunting rule
Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)

File information

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

Comments