MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c4a23568dbd705245642ebfbef600be767853d1c3e0451154895c6adcd8e9690. 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


Vidar


Vendor detections: 13


Intelligence 13 IOCs YARA 35 File information Comments
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SHA256 hash: c4a23568dbd705245642ebfbef600be767853d1c3e0451154895c6adcd8e9690
SHA3-384 hash: 707cc340419cab6d605636a565dcb454875dd050bb0706e537cfd6ede474491d03f3aeeee674171dc9e9cd0f4ff04aa4
SHA1 hash: 6f5ad50f27d1af1843e69be110afdee0d3f54299
MD5 hash: 0bf24c96b0a66facb5ca534abccaea10
humanhash: black-island-rugby-whiskey
File name:__zst____r_64-v.9.955.exe
Download: download sample
Signature Vidar
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File size:2'650'760 bytes
First seen:2026-05-31 07:24:37 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash d42595b695fc008ef2c56aabd8efd68e (390 x Vidar, 94 x Stealc, 92 x Rhadamanthys)
ssdeep 49152:Uql0xpGrhYKijDTy9uPcBB09Mvm9gjYs3O/J+4UlfTOaHw:UVQ2OuI09gjWlZaQ
TLSH T1D6C57A876C62E1E1C85576B364A341707B24BC146FB6A7F72D8872382F366C449FAF84
TrID 33.1% (.EXE) Win64 Executable (generic) (6522/11/2)
25.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
10.4% (.ICL) Windows Icons Library (generic) (2059/9)
10.3% (.EXE) OS/2 Executable (generic) (2029/13)
10.1% (.EXE) Generic Win/DOS Executable (2002/3)
Magika pebin
Reporter abuse_ch
Tags:exe signed vidar

Code Signing Certificate

Organisation:cpcalendars.zewa.com
Issuer:R12
Algorithm:sha256WithRSAEncryption
Valid from:2026-05-11T01:23:30Z
Valid to:2026-08-09T01:23:29Z
Serial number: 0688f7cbd280937fc7ce5caa93072588e9d3
Intelligence: 6 malware samples on MalwareBazaar are signed with this code signing certificate
Thumbprint Algorithm:SHA256
Thumbprint: a549a710e1aa05b8cf962d9919764c714e968ab1e048129b49e9c9145c306090
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
131
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Malware family:
vidar
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ID:
1
File name:
https://amaamn.com/
Verdict:
Malicious activity
Analysis date:
2026-05-30 23:41:25 UTC
Tags:
stealer stealc vidar arch-exec attachments attc-unc golang
Link:
https://app.any.run/tasks/2447cc5b-7c13-4fdf-990d-3e3199ea45c5

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/68582/
Detection(s):
SecuriteInfo.com.Win64.Evo-gen.79467251.UNOFFICIAL
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Verdict:
Malicious
Score:
94.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a1b4ad8a22676d7bfe43fda
Tags:
injection obfusc crypt lien
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Connection attempt
Sending a custom TCP request
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/c4a23568dbd705245642ebfbef600be767853d1c3e0451154895c6adcd8e9690
Verdict:
Malicious
File Type:
exe x64
First seen:
2026-05-30T17:47:00Z UTC
Last seen:
2026-06-01T23:23:00Z UTC
Hits:
~100
Detections:
Backdoor.Win64.Gsb.sb Backdoor.Win64.Gsb.gen Trojan.Win64.Agent.sb Trojan-PSW.Stealerc.TCP.C&C Trojan-PSW.Stealerc.HTTP.C&C
Link:
https://opentip.kaspersky.com/c4a23568dbd705245642ebfbef600be767853d1c3e0451154895c6adcd8e9690/results?tab=lookup
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/72db59af-c450-43c5-97b9-0fac31db2b81
Result
Threat name:
Vidar
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Detection:
malicious
Classification:
troj.spyw.evad.mine
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1920714
Signature
AI detected suspicious PE digital signature
Contains functionality to registers a callback to get notified when the system is suspended or resumed (often done by Miners)
Creates a thread in another existing process (thread injection)
Detected unpacking (creates a PE file in dynamic memory)
Found many strings related to Crypto-Wallets (likely being stolen)
Hides threads from debuggers
Joe Sandbox ML detected suspicious sample
Monitors registry run keys for changes
Multi AV Scanner detection for submitted file
Potentially malicious time measurement code found
Queues an APC in another process (thread injection)
Suricata IDS alerts for network traffic
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal ftp login credentials
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Unusual module load detection (module proxying)
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1920714 Sample: __zst____r_64-v.9.955.exe Startdate: 31/05/2026 Architecture: WINDOWS Score: 100 49 Suricata IDS alerts for network traffic 2->49 51 Multi AV Scanner detection for submitted file 2->51 53 Yara detected Vidar stealer 2->53 55 2 other signatures 2->55 7 __zst____r_64-v.9.955.exe 1 14 2->7         started        11 msedge.exe 295 2->11         started        13 msedge.exe 8 2->13         started        process3 dnsIp4 43 138.199.150.1, 443, 49698, 49732 HETZNER-ASDE Germany 7->43 57 Detected unpacking (creates a PE file in dynamic memory) 7->57 59 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 7->59 61 Found many strings related to Crypto-Wallets (likely being stolen) 7->61 63 10 other signatures 7->63 15 msedge.exe 9 7->15         started        18 msedge.exe 2 9 7->18         started        20 chrome.exe 7->20         started        45 192.168.2.8, 138, 443, 49673 unknown unknown 11->45 47 239.255.255.250 unknown ZZ 11->47 22 msedge.exe 11->22         started        25 msedge.exe 11->25         started        27 msedge.exe 11->27         started        29 msedge.exe 13->29         started        signatures5 process6 dnsIp7 65 Monitors registry run keys for changes 15->65 31 msedge.exe 15->31         started        33 msedge.exe 18->33         started        35 chrome.exe 20->35         started        37 mr-afd-azuredge.tm-azurefd.net 150.171.110.178, 443, 49726 MICROSOFT-CORP-MSN-AS-BLOCK-MicrosoftCorporationUS United States 22->37 39 150.171.110.2, 443, 49727, 49728 MICROSOFT-CORP-MSN-AS-BLOCK-MicrosoftCorporationUS United States 22->39 41 11 other IPs or domains 22->41 signatures8 process9
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/c4a23568dbd705245642ebfbef600be767853d1c3e0451154895c6adcd8e9690
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c4a23568dbd705245642ebfbef600be767853d1c3e0451154895c6adcd8e9690/
Threat name:
Win64.Trojan.Generic
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Status:
Suspicious
First seen:
2026-05-30 20:39:26 UTC
File Type:
PE+ (Exe)
AV detection:
6 of 36 (16.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ysrdk2g324csivsc5p566yal45tykpi4hycfcfkisxdk3tmos2ia._file
Verdict:
malicious
Label(s):
unc_go_loader_002
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Similar samples:
error
Vidar
Result
Malware family:
n/a
Score:
  10/10
Tags:
credential_access discovery spyware stealer
Link:
https://tria.ge/reports/260531-h9an4acs41/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies data under HKEY_USERS
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Browser Information Discovery
System Time Discovery
Suspicious use of NtSetInformationThreadHideFromDebugger
Checks installed software on the system
Reads WinSCP keys stored on the system
Reads data files stored by FTP clients
Reads user/profile data of web browsers
Unsecured Credentials: Credentials In Files
Suspicious use of NtCreateProcessExOtherParentProcess
Unpacked files
SH256 hash:
c4a23568dbd705245642ebfbef600be767853d1c3e0451154895c6adcd8e9690
MD5 hash:
0bf24c96b0a66facb5ca534abccaea10
SHA1 hash:
6f5ad50f27d1af1843e69be110afdee0d3f54299
Link:
https://www.unpac.me/results/728138b9-ba17-4ae0-ae77-cc2881246475/
Malware family:
Vidar
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Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c4a23568dbd7/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.00
Link:
https://yomi.yoroi.company/submissions/c4a23568dbd705245642ebfbef600be767853d1c3e0451154895c6adcd8e9690

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:Check_Dlls
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Rule name:command_and_control
Create hunting rule
Author:CD_R0M_
Description:This rule searches for common strings found by malware using C2. Based on a sample used by a Ransomware group
Rule name:CP_Script_Inject_Detector
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Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerException__SetConsoleCtrl
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
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Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:DetectGoMethodSignatures
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Author:Wyatt Tauber
Description:Detects Go method signatures in unpacked Go binaries
Rule name:dgaagas
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Author:Harshit
Description:Uses certutil.exe to download a file named test.txt
Rule name:FreddyBearDropper
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Author:Dwarozh Hoshiar
Description:Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.
Rule name:GoBinTest
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Rule name:golang
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Rule name:Golangmalware
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Author:Dhanunjaya
Description:Malware in Golang
Rule name:golang_binary_string
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Description:Golang strings present
Rule name:golang_bin_JCorn_CSC846
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Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:golang_duffcopy_amd64
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Rule name:Golang_Find_CSC846
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Author:Ashar Siddiqui
Description:Find Go Signatuers
Rule name:Golang_Find_CSC846_Simple
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Author:Ashar Siddiqui
Description:Find Go Signatuers
Rule name:HiveRansomware
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Author:Dhanunjaya
Description:Yara Rule To Detect Hive V4 Ransomware
Rule name:INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
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Author:ditekSHen
Description:Detects Windows executables referencing non-Windows User-Agents
Rule name:INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
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Author:ditekSHen
Description:Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion
Rule name:PE_Digital_Certificate
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Author:albertzsigovits
Rule name:ProgramLanguage_Golang
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Author:albertzsigovits
Description:Application written in Golang programming language
Rule name:RANSOMWARE
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Author:ToroGuitar
Rule name:RemusStealer_GoPayload
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Author:burger
Description:Detects RemusStealer Go-compiled payload
Rule name:SEH__vectored
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Suspicious_Golang_Binary
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Author:Tim Machac
Description:Triage: Golang-compiled binary with suspicious OS/persistence/network strings (not family-specific)
Rule name:Sus_CMD_Powershell_Usage
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Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)
Rule name:telebot_framework
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Author:vietdx.mb
Rule name:ThreadControl__Context
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:TH_AntiVM_MassHunt_Win_Malware_2026_CYFARE
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Author:CYFARE
Description:Detects Windows malware employing anti-VM / anti-sandbox evasion techniques across VMware, VirtualBox, Hyper-V, QEMU, Xen, and generic sandbox environments
Reference:https://cyfare.net/
Rule name:VECT_Ransomware
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Author:Mustafa Bakhit
Description:Detects activity associated with VECT ransomware. This includes registry modifications and deletions, execution of system and defense-evasion commands, suspicious API usage, mutex creation, file and memory manipulation, ransomware note generation, anti-debugging and anti-analysis techniques, and embedded cryptographic constants (SHA256) characteristic of this malware family. Designed for threat intelligence and malware detection environments.

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/68582/

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