MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fc8f755ff72624e30236dd2c3d1cda3183dd563db05cd5675ef123dddeb72ac8. 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


VioletWorm


Vendor detections: 8


Intelligence 8 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: fc8f755ff72624e30236dd2c3d1cda3183dd563db05cd5675ef123dddeb72ac8
SHA3-384 hash: fce75ec0c3bbf79c5807c72e8e27842519fe72da50967817c667c7dd2075fb25832f727b97973e7cf8ad052336650271
SHA1 hash: 8ea7671befe3312793227cce100c4c64c93f8c2d
MD5 hash: 4e950740bf977e9c89d48cd323c3c0b2
humanhash: freddie-avocado-johnny-ten
File name:YTLDYC.bat
Download: download sample
Signature VioletWorm
Create hunting rule
File size:12'362'011 bytes
First seen:2026-04-06 12:07:32 UTC
Last seen:Never
File type:Batch (bat) bat
MIME type:text/x-msdos-batch
ssdeep 3072:RllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllN:r
TLSH T1D2C6AF4B82C73A9742D350B47B3929B9077FE8638A50C6BF2EDB004C444FF5D98B9666
Magika batch
Reporter abuse_ch
Tags:bat VioletWorm

Intelligence

File Origin
# of uploads :
1
# of downloads :
67
Origin country :
SE SE
Vendor Threat Intelligence
Gathering data
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/60604/
Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=69d3a2396a61012f6acf57c3
Tags:
ransomware shell sage
Result
Verdict:
Clean
Maliciousness:

Behaviour
Running batch commands
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
base64 base64 dropper evasive explorer lolbin net obfuscated powershell reconnaissance
Link:
https://www.filescan.io/uploads/69d3a2352346b9da57c135b8/reports/051d6fa5-d8de-48ed-bcec-34cfff1d4c82/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/fc8f755ff72624e30236dd2c3d1cda3183dd563db05cd5675ef123dddeb72ac8
Result
Gathering data
Verdict:
Unknown
File Type:
unix shell
First seen:
2026-04-05T15:35:00Z UTC
Last seen:
2026-04-06T07:11:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/fc8f755ff72624e30236dd2c3d1cda3183dd563db05cd5675ef123dddeb72ac8/results?tab=lookup
Result
Threat name:
VioletWorm
Create hunting rule
Detection:
malicious
Classification:
troj.adwa.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1893955
Signature
.NET source code contains potential unpacker
.NET source code contains suspicious base64 encoded strings
Antivirus detection for dropped file
Bypasses PowerShell execution policy
C2 URLs / IPs found in malware configuration
Drops PE files to the startup folder
Drops PE files with benign system names
Found large BAT file
Found malware configuration
Found suspicious powershell code related to unpacking or dynamic code loading
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Powershell drops PE file
Sample uses string decryption to hide its real strings
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Files With System Process Name In Unsuspected Locations
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: System File Execution Location Anomaly
Suricata IDS alerts for network traffic
Suspicious powershell command line found
Yara detected Powershell decode and execute
Yara detected VioletWorm
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1893955 Sample: YTLDYC.bat Startdate: 06/04/2026 Architecture: WINDOWS Score: 100 49 raw.githubusercontent.com 2->49 51 github.com 2->51 61 Suricata IDS alerts for network traffic 2->61 63 Found malware configuration 2->63 65 Malicious sample detected (through community Yara rule) 2->65 67 14 other signatures 2->67 9 cmd.exe 1 2->9         started        12 svchost.exe 1 2->12         started        14 setup.exe 1 2->14         started        16 svchost.exe 2->16         started        signatures3 process4 signatures5 77 Suspicious powershell command line found 9->77 79 Bypasses PowerShell execution policy 9->79 18 cmd.exe 1 9->18         started        21 conhost.exe 9->21         started        81 Antivirus detection for dropped file 12->81 83 Multi AV Scanner detection for dropped file 12->83 process6 signatures7 59 Suspicious powershell command line found 18->59 23 powershell.exe 14 17 18->23         started        27 powershell.exe 23 18->27         started        30 net.exe 1 18->30         started        32 conhost.exe 18->32         started        process8 dnsIp9 55 github.com 140.82.114.4, 443, 49695 GITHUBUS United States 23->55 57 raw.githubusercontent.com 185.199.109.133, 443, 49696 FASTLYUS Netherlands 23->57 47 C:\Users\user\AppData\Local\Temp\setup.exe, PE32+ 23->47 dropped 34 setup.exe 1 4 23->34         started        85 Found suspicious powershell code related to unpacking or dynamic code loading 27->85 87 Loading BitLocker PowerShell Module 27->87 89 Powershell drops PE file 27->89 39 WmiPrvSE.exe 27->39         started        41 net1.exe 1 30->41         started        file10 signatures11 process12 dnsIp13 53 38.14.248.232, 49697, 7000 COGENT-174US United States 34->53 43 C:\Users\user\AppData\Roaming\...\svchost.exe, PE32+ 34->43 dropped 45 C:\Users\user\AppData\Roaming\...\setup.exe, PE32+ 34->45 dropped 69 Antivirus detection for dropped file 34->69 71 Multi AV Scanner detection for dropped file 34->71 73 Drops PE files to the startup folder 34->73 75 Drops PE files with benign system names 34->75 file14 signatures15
Score:
95%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/fc8f755ff72624e30236dd2c3d1cda3183dd563db05cd5675ef123dddeb72ac8
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/fc8f755ff72624e30236dd2c3d1cda3183dd563db05cd5675ef123dddeb72ac8/
Verdict:
Malicious
Threat:
Family.VIOLETWORM
Link:
https://tip.neiki.dev/file/fc8f755ff72624e30236dd2c3d1cda3183dd563db05cd5675ef123dddeb72ac8
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7shxkx7xeysogarw3uwd2hg2ggb52vr5wbonkz266er53xvxflea._file
Result
Malware family:
n/a
Score:
  10/10
Tags:
execution persistence
Link:
https://tria.ge/reports/260406-pa2rvscw2y/
Behaviour
Runs net.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Adds Run key to start application
Command and Scripting Interpreter: PowerShell
Contacts third-party web service commonly abused for C2
Drops startup file
Executes dropped EXE
Badlisted process makes network request
Downloads MZ/PE file
Malware Config
Dropper Extraction:
https://github.com/l44443934-ui/aaa/raw/refs/heads/main/he.exe
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/fc8f755ff72624e30236dd2c3d1cda3183dd563db05cd5675ef123dddeb72ac8

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:Base64_Encoded_Powershell_Directives
Create hunting rule
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.

Web download

VioletWorm

Batch (bat) bat fc8f755ff72624e30236dd2c3d1cda3183dd563db05cd5675ef123dddeb72ac8

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3812865/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/60604/

Comments