MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b39688635bb5b2a90bb9101b372080b61d6ba78f2cd78ee275a983a84e2a047d. 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

ACRStealer

Vendor detections: 16

Intelligence 16 IOCs YARA 21 File information Comments

SHA256 hash:	b39688635bb5b2a90bb9101b372080b61d6ba78f2cd78ee275a983a84e2a047d
SHA3-384 hash:	6c90657cc36a855151490792f6692e72be45698619228662e02737ca535681c797fb7b86d39c07211e8649893d9e30aa
SHA1 hash:	4c58327fb51bf9afc6ea9e910e92b81fef86e40c
MD5 hash:	b601ca8a198c8971c069052d588aac4f
humanhash:	eight-neptune-sixteen-vegan
File name:	kythy.exe
Download:	download sample
Signature	ACRStealer Create hunting rule
File size:	4'382'848 bytes
First seen:	2026-05-28 23:33:11 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	d42595b695fc008ef2c56aabd8efd68e (647 x Vidar, 226 x RemusStealer, 109 x Stealc)
ssdeep	24576:lj4SUw4RXMmAezRybIYrrwoQKo4ajMxfO0CXak1fnBele5yK2tFmA2b:ljzUXRHAezkEDJMkVOXkAK
TLSH	T12F167C4A7CE149EAC0AA633288B722867B71BC550F3263D72E50B7783FB26E45D35744
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
dhash icon	eaadc888d8dcf4d4 (1 x ACRStealer)
Reporter	aachum
Tags:	ACRStealer cloud55file-cc exe NeuraLoader neuralpulsecore5-sbs signed

Code Signing Certificate

Organisation:	quiverquant.com
Issuer:	WE1
Algorithm:	sha256WithRSAEncryption
Valid from:	2026-05-09T21:13:51Z
Valid to:	2026-08-07T22:13:46Z
Serial number:	10f69e50b05b14f30ebf139155b65887
Intelligence:	27 malware samples on MalwareBazaar are signed with this code signing certificate
Thumbprint Algorithm:	SHA256
Thumbprint:	9a3fb262c673ebb22f790e6c65ece32fff989134dda340e731e09fd2d3bda93d
Source:	This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

iamaachum

http://host4file.cc/load/kythy.exe | http://cloud55file.cc/load/kythy.exe

C2: neuralpulsecore5.sbs

Intelligence

File Origin

# of uploads :

# of downloads :

155

Origin country :

Vendor Threat Intelligence

No detections

Malware family:

vidar

ID:

File name:

kythy.exe

Verdict:

Malicious activity

Analysis date:

2026-05-28 23:06:12 UTC

Tags:

ip-check evasion loader generic golang stealer hijackloader auto-startup stealc vidar python

Link:

https://app.any.run/tasks/e89e5171-5b75-416e-8f1e-6e076912fcca

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/68352/

Detection(s):

SecuriteInfo.com.Trojan.Siggen32.45565.26261.8528.UNOFFICIAL

Verdict:

Malicious

Score:

70%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6a18ca6133dfa243d40a9aec

Tags:

injection obfusc

Result

Verdict:

Malware

Maliciousness:

Behaviour

DNS request

Connection attempt

Sending an HTTP GET request

Sending a custom TCP request

Creating a file

Creating a process from a recently created file

Sending an HTTP GET request to an infection source

Creating a window

Creating a file in the %temp% directory

Creating a file in the %AppData% subdirectories

Using the Windows Management Instrumentation requests

Сreating synchronization primitives

Reading critical registry keys

Connection attempt to an infection source

Unauthorized injection to a recently created process by context flags manipulation

Stealing user critical data

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

adaptive-context anti-vm golang overlay packed signed

Link:

https://www.filescan.io/uploads/6a18d0c212da0d249c5c51f8/reports/480a751a-d19b-4033-bc90-c626834e0335/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_90%

Link:

https://www.hybrid-analysis.com/sample/b39688635bb5b2a90bb9101b372080b61d6ba78f2cd78ee275a983a84e2a047d

Verdict:

Malicious

File Type:

exe x64

First seen:

2026-05-28T08:47:00Z UTC

Last seen:

2026-05-29T08:33:00Z UTC

Hits:

~100

Detections:

Backdoor.Win64.Gsb.sb Backdoor.Win64.Gsb.gen

Link:

https://opentip.kaspersky.com/b39688635bb5b2a90bb9101b372080b61d6ba78f2cd78ee275a983a84e2a047d/results?tab=lookup

Verdict:

Unknown

Link:

https://analyze.intezer.com/analyses/0879f0a4-2a93-4786-bafa-a7552f006e31

Result

Threat name:

ACR Stealer, GO Stealer

Detection:

malicious

Classification:

troj.spyw.evad.mine

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1920087

Signature

AI detected suspicious PE digital signature

Allocates memory in foreign processes

Antivirus detection for URL or domain

Contains functionality to registers a callback to get notified when the system is suspended or resumed (often done by Miners)

Detected unpacking (creates a PE file in dynamic memory)

Drops PE files to the document folder of the user

Found direct / indirect Syscall (likely to bypass EDR)

Found many strings related to Crypto-Wallets (likely being stolen)

Hides threads from debuggers

Maps a DLL or memory area into another process

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Potentially malicious time measurement code found

Suricata IDS alerts for network traffic

Switches to a custom stack to bypass stack traces

Tries to harvest and steal browser information (history, passwords, etc)

Tries to steal Crypto Currency Wallets

Unusual module load detection (module proxying)

Uses known network protocols on non-standard ports

Writes to foreign memory regions

Yara detected ACR Stealer

Yara detected GO Stealer

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/b39688635bb5b2a90bb9101b372080b61d6ba78f2cd78ee275a983a84e2a047d

Gathering data

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/b39688635bb5b2a90bb9101b372080b61d6ba78f2cd78ee275a983a84e2a047d/

Verdict:

Malicious

Threat:

Family.HIJACKLOADER

Link:

https://tip.neiki.dev/file/b39688635bb5b2a90bb9101b372080b61d6ba78f2cd78ee275a983a84e2a047d

Threat name:

Win64.Trojan.Egairtigado

Status:

Malicious

First seen:

2026-05-28 21:30:00 UTC

File Type:

PE+ (Exe)

Extracted files:

AV detection:

22 of 38 (57.89%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=woliqy23wwzksc5zcantoieawyowxj4pftly5ytvvgb2qtrkar6q._file

Verdict:

malicious

Label(s):

unc_go_loader_002

Similar samples:

error

ACRStealer

Result

Malware family:

hijackloader

Score:

10/10

Tags:

family:hijackloader credential_access discovery loader spyware stealer

Link:

https://tria.ge/reports/260528-3j1stad15n/

Behaviour

Checks processor information in registry

Enumerates system info in registry

Modifies data under HKEY_USERS

Modifies registry class

Suspicious behavior: AddClipboardFormatListener

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

Suspicious behavior: MapViewOfSection

Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

Browser Information Discovery

Enumerates physical storage devices

System Location Discovery: System Language Discovery

System Time Discovery

Drops file in Program Files directory

Drops file in Windows directory

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Accesses cryptocurrency files/wallets, possible credential harvesting

Checks installed software on the system

Drops desktop.ini file(s)

Looks up external IP address via web service

Checks computer location settings

Executes dropped EXE

Loads dropped DLL

Reads user/profile data of local email clients

Reads user/profile data of web browsers

Unsecured Credentials: Credentials In Files

Downloads MZ/PE file

Detects HijackLoader (aka IDAT Loader)

Family: HijackLoader, IDAT loader, Ghostulse,

Suspicious use of NtCreateProcessExOtherParentProcess

Suspicious use of NtCreateUserProcessOtherParentProcess

Unpacked files

SH256 hash:

b39688635bb5b2a90bb9101b372080b61d6ba78f2cd78ee275a983a84e2a047d

MD5 hash:

b601ca8a198c8971c069052d588aac4f

SHA1 hash:

4c58327fb51bf9afc6ea9e910e92b81fef86e40c

Link:

https://www.unpac.me/results/3412560c-241e-4472-b23f-a2db2f07fef6/

Malware family:

HijackLoader

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/b39688635bb5/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/b39688635bb5b2a90bb9101b372080b61d6ba78f2cd78ee275a983a84e2a047d

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:	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 Create hunting rule
Author:	DiegoAnalytics
Description:	Detects attempts to inject code into another process across PE, ELF, Mach-O binaries

Rule name:	DebuggerException__SetConsoleCtrl Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	DetectGoMethodSignatures Create hunting rule
Author:	Wyatt Tauber
Description:	Detects Go method signatures in unpacked Go binaries

Rule name:	Detect_Go_GOMAXPROCS Create hunting rule
Author:	Obscurity Labs LLC
Description:	Detects Go binaries by the presence of runtime.GOMAXPROCS in the runtime metadata

Rule name:	GoBinTest Create hunting rule

Rule name:	golang Create hunting rule

Rule name:	Golangmalware Create hunting rule
Author:	Dhanunjaya
Description:	Malware in Golang

Rule name:	golang_binary_string Create hunting rule
Description:	Golang strings present

Rule name:	golang_bin_JCorn_CSC846 Create hunting rule
Author:	Justin Cornwell
Description:	CSC-846 Golang detection ruleset

Rule name:	golang_duffcopy_amd64 Create hunting rule

Rule name:	Golang_Find_CSC846 Create hunting rule
Author:	Ashar Siddiqui
Description:	Find Go Signatuers

Rule name:	Golang_Find_CSC846_Simple Create hunting rule
Author:	Ashar Siddiqui
Description:	Find Go Signatuers

Rule name:	HiveRansomware Create hunting rule
Author:	Dhanunjaya
Description:	Yara Rule To Detect Hive V4 Ransomware

Rule name:	PE_Digital_Certificate Create hunting rule
Author:	albertzsigovits

Rule name:	ProgramLanguage_Golang Create hunting rule
Author:	albertzsigovits
Description:	Application written in Golang programming language

Rule name:	RemusStealer_GoPayload Create hunting rule
Author:	burger
Description:	Detects RemusStealer Go-compiled payload

Rule name:	SEH__vectored Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	Suspicious_Golang_Binary Create hunting rule
Author:	Tim Machac
Description:	Triage: Golang-compiled binary with suspicious OS/persistence/network strings (not family-specific)

Rule name:	ThreadControl__Context Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	TH_AntiVM_MassHunt_Win_Malware_2026_CYFARE Create hunting rule
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/