MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8638d79bd3e5370b1a1525cb43e9b92a5d99d58a947f4dc06c692f5f9a82bcd8. 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

QuasarRAT

Vendor detections: 16

Intelligence 16 IOCs YARA 29 File information Comments

SHA256 hash:	8638d79bd3e5370b1a1525cb43e9b92a5d99d58a947f4dc06c692f5f9a82bcd8
SHA3-384 hash:	619f06e5731871f661c4d72cb01f04b3a9485a397331656d2cf2429e65a8af932d7a9e5a0d2edd6f865d3d9353c231ef
SHA1 hash:	30f9a1fee88b5b013aa6c8b660cade3336c58467
MD5 hash:	adb998b734268635cec4ba838f70bffe
humanhash:	wisconsin-table-yellow-arkansas
File name:	z1Comprobante_de_Transferencia.exe
Download:	download sample
Signature	QuasarRAT Create hunting rule
File size:	4'020'224 bytes
First seen:	2025-09-16 04:00:13 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'655 x AgentTesla, 19'464 x Formbook, 12'205 x SnakeKeylogger)
ssdeep	98304:qPXVrkJ1Uqaou3SGxQWEMO7cfA7NbR0s7b9/B3:+XE1Uqaou3DgMadVR0E/l
Threatray	258 similar samples on MalwareBazaar
TLSH	T1951633CD32A072EFD847C8344D580EA8D7152D7AA72B9143644774EBEA3E987DF190B2
TrID	28.5% (.EXE) Win64 Executable (generic) (10522/11/4) 17.8% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 13.6% (.EXE) Win16 NE executable (generic) (5038/12/1) 12.2% (.EXE) Win32 Executable (generic) (4504/4/1) 5.6% (.EXE) Win16/32 Executable Delphi generic (2072/23)
Magika	pebin
Reporter	FXOLabs
Tags:	exe QuasarRAT

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

z1Comprobante_de_Transferencia.exe

Verdict:

Malicious activity

Analysis date:

2025-09-16 04:00:47 UTC

Tags:

auto-reg crypto-regex confuser

Link:

https://app.any.run/tasks/8d9cc36c-24c6-4a0a-b251-6736e0d3a895

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/27628/

Verdict:

Malicious

Score:

94.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=68c8e0efd49ea3f1e4b647cc

Tags:

autorun packed spawn sage

Result

Verdict:

Malware

Maliciousness:

Behaviour

Unauthorized injection to a recently created process

Restart of the analyzed sample

Creating a file

Sending a custom TCP request

Creating a window

Сreating synchronization primitives

Creating a file in the %AppData% subdirectories

Launching a process

Enabling autorun by creating a file

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

base64 confuser confuserex net obfuscated obfuscated packed packed vbnet

Link:

https://www.filescan.io/uploads/68c8e0eb0d1238ff0aaca369/reports/759fbacd-17be-47bf-a153-0fe69b92d28d/overview

Verdict:

Malicious

Labled as:

MSILHeracles.Generic

Link:

https://www.hybrid-analysis.com/sample/8638d79bd3e5370b1a1525cb43e9b92a5d99d58a947f4dc06c692f5f9a82bcd8

Verdict:

Malicious

File Type:

exe x32

First seen:

2025-09-15T13:38:00Z UTC

Last seen:

2025-09-15T13:38:00Z UTC

Hits:

~100

Link:

https://opentip.kaspersky.com/8638d79bd3e5370b1a1525cb43e9b92a5d99d58a947f4dc06c692f5f9a82bcd8/results?tab=lookup

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/38bbe075-c278-429d-be93-a89b8eca0229

Score:

99%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/8638d79bd3e5370b1a1525cb43e9b92a5d99d58a947f4dc06c692f5f9a82bcd8

Verdict:

inconclusive

YARA:

10 match(es)

Tags:

.Net Executable Managed .NET PE (Portable Executable) PE File Layout SOS: 1.00 Win 32 Exe x86

Link:

https://app.malva.re/file/adb998b734268635cec4ba838f70bffe

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/8638d79bd3e5370b1a1525cb43e9b92a5d99d58a947f4dc06c692f5f9a82bcd8/

Threat name:

ByteCode-MSIL.Trojan.Leonem

Status:

Malicious

First seen:

2025-09-15 17:52:39 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

21 of 24 (87.50%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=qy4npg6t4u3qwgqvexfuh2nzfjoztvmksr7u3qdmnexv7gucxtma._file

Verdict:

malicious

Label(s):

quasarrat

QuasarRAT

23228723bd373f0a2907aa450ebaf3a218fac346c3d854ee7554b899dcc198ab

QuasarRAT

678fec195529ac67002cf29197d43af393d9e1d27d42c29f1b9bc1635f1a2d00

QuasarRAT

7be2273bfc26f6f298548a4ff29de90dd24c8dc6b473ea06c2d59c62e09cedff

QuasarRAT

c30fdd073be8172d6975c53b1c6fa4955a0f20ebaef408228017540ba4d8ad62

QuasarRAT

e00aa14eab3def5c39e2be5d0f787d47caf495b1566f6c52d2771f4c4150f47a

QuasarRAT

error

QuasarRAT

fc53884a4452b6f808e280dc3fc3a051d0129be2aabf61ea816dacf6c3ea9e80

QuasarRAT

+ 248 additional samples on MalwareBazaar

Result

Malware family:

quasar

Score:

10/10

Tags:

family:quasar botnet:silver01 discovery execution persistence spyware trojan

Link:

https://tria.ge/reports/250916-ekz1xayqv6/

Behaviour

Scheduled Task/Job: Scheduled Task

Suspicious behavior: AddClipboardFormatListener

Suspicious use of AdjustPrivilegeToken

Suspicious use of UnmapMainImage

Suspicious use of WriteProcessMemory

Program crash

System Location Discovery: System Language Discovery

ConfuserEx .NET packer

Suspicious use of SetThreadContext

Executes dropped EXE

Quasar RAT

Quasar family

Quasar payload

Malware Config

C2 Extraction:

onanothertry.ydns.eu:4799
asesorarcolom.crabdance.com:4898

Verdict:

Malicious

Tags:

red_team_tool

YARA:

SUSP_NET_NAME_ConfuserEx

Link:

https://app.threat.zone/submission/6c3c057d-d488-4f3f-bb29-ff01b370de92

Unpacked files

SH256 hash:

8638d79bd3e5370b1a1525cb43e9b92a5d99d58a947f4dc06c692f5f9a82bcd8

MD5 hash:

adb998b734268635cec4ba838f70bffe

SHA1 hash:

30f9a1fee88b5b013aa6c8b660cade3336c58467

Link:

https://www.unpac.me/results/bd640845-718a-4642-8eda-58c597d9ab73/

SH256 hash:

3f06a2cca7095ae765f0d29d1c7998dbbd901ecc0a1b0d79d372daa14db67066

MD5 hash:

f7123f518fa6e2da4a11ade278b8a1dc

SHA1 hash:

03d3d45e89cc03872864e27d5a78ee1be095cecb

Detections:

QuasarRAT

cn_utf8_windows_terminal

malware_windows_xrat_quasarrat

MAL_QuasarRAT_May19_1

MAL_BackNet_Nov18_1

INDICATOR_EXE_Packed_Fody

INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL

INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Link:

https://www.unpac.me/results/bd640845-718a-4642-8eda-58c597d9ab73/

Parent samples :

23228723bd373f0a2907aa450ebaf3a218fac346c3d854ee7554b899dcc198ab
8638d79bd3e5370b1a1525cb43e9b92a5d99d58a947f4dc06c692f5f9a82bcd8
7be2273bfc26f6f298548a4ff29de90dd24c8dc6b473ea06c2d59c62e09cedff
c9b1c0660b49eeaea761b489d5c00235f7a597b4a5b244643418d6375e436b42

SH256 hash:

f989c723cad05860fb1aecb931283163d35997e63f59caa1ff11406c42220323

MD5 hash:

dd477dda812a2ad75c7285aa79ada0f9

SHA1 hash:

3c203c0f807b3d740645a396262d3fe80321ff7d

Link:

https://www.unpac.me/results/bd640845-718a-4642-8eda-58c597d9ab73/

SH256 hash:

d989fe2546a5437e9420c4d3585441ee215a743087960c34cd04955293d1e0ca

MD5 hash:

1d8702f155c9b225a5d0fce814777c75

SHA1 hash:

2c7efc378489926b07b180a8366c8f0552c605e2

Detections:

SUSP_NET_Large_Static_Array_In_Small_File_Jan24

HKTL_NET_GUID_Quasar

Link:

https://www.unpac.me/results/bd640845-718a-4642-8eda-58c597d9ab73/

Parent samples :
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Malware family:

QuasarRAT

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/8638d79bd3e5/report/overview.html

Please note that we are no longer able to provide a coverage score for Virus Total.

Threat name:

iSpy Keylogger

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/8638d79bd3e5370b1a1525cb43e9b92a5d99d58a947f4dc06c692f5f9a82bcd8

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 Create hunting rule

Rule name:	Costura_Protobuf Create hunting rule
Author:	@bartblaze
Description:	Identifies Costura and Protobuf in .NET assemblies, respectively for storing resources and (de)serialization. Seen together might indicate a suspect binary.

Rule name:	CP_AllMal_Detector Create hunting rule
Author:	DiegoAnalytics
Description:	CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication

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

Rule name:	DebuggerCheck__QueryInfo 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 Create hunting rule
Author:	Zinyth
Description:	Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded

Rule name:	Detect_PowerShell_Obfuscation Create hunting rule
Author:	daniyyell
Description:	Detects obfuscated PowerShell commands commonly used in malicious scripts.

Rule name:	FreddyBearDropper Create hunting rule
Author:	Dwarozh Hoshiar
Description:	Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.

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

Rule name:	INDICATOR_EXE_Packed_ConfuserEx Create hunting rule
Author:	ditekSHen
Description:	Detects executables packed with ConfuserEx Mod

Rule name:	INDICATOR_EXE_Packed_ConfuserEx_Custom Create hunting rule
Author:	ditekSHen
Description:	Detects executables packed with ConfuserEx Custom; outside of GIT

Rule name:	INDICATOR_EXE_Packed_Fody Create hunting rule
Author:	ditekSHen
Description:	Detects executables manipulated with Fody

Rule name:	Indicator_MiniDumpWriteDump Create hunting rule
Author:	Obscurity Labs LLC
Description:	Detects PE files and PowerShell scripts that use MiniDumpWriteDump either through direct imports or string references

Rule name:	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA Create hunting rule
Author:	ditekSHen
Description:	Detects Windows executables referencing non-Windows User-Agents

Rule name:	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL Create hunting rule
Author:	ditekSHen
Description:	Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion

Rule name:	MAL_BackNet_Nov18_1 Create hunting rule
Author:	Florian Roth (Nextron Systems)
Description:	Detects BackNet samples
Reference:	https://github.com/valsov/BackNet

Rule name:	MAL_BackNet_Nov18_1_RID2D6D Create hunting rule
Author:	Florian Roth
Description:	Detects BackNet samples
Reference:	https://github.com/valsov/BackNet

Rule name:	MAL_QuasarRAT_May19_1 Create hunting rule
Author:	Florian Roth (Nextron Systems)
Description:	Detects QuasarRAT malware
Reference:	https://blog.ensilo.com/uncovering-new-activity-by-apt10

Rule name:	MAL_QuasarRAT_May19_1_RID2E1E Create hunting rule
Author:	Florian Roth
Description:	Detects QuasarRAT malware
Reference:	https://blog.ensilo.com/uncovering-new-activity-by-apt10

Rule name:	Multifamily_RAT_Detection Create hunting rule
Author:	Lucas Acha (http://www.lukeacha.com)
Description:	Generic Detection for multiple RAT families, PUPs, Packers and suspicious executables

Rule name:	NET Create hunting rule
Author:	malware-lu

Rule name:	NETexecutableMicrosoft Create hunting rule
Author:	malware-lu

Rule name:	pe_imphash Create hunting rule

Rule name:	RANSOMWARE Create hunting rule
Author:	ToroGuitar

Rule name:	Skystars_Malware_Imphash Create hunting rule
Author:	Skystars LightDefender
Description:	imphash

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.

Malspam

QuasarRAT

exe 8638d79bd3e5370b1a1525cb43e9b92a5d99d58a947f4dc06c692f5f9a82bcd8

(this sample)

Delivery method

Distributed via e-mail attachment

Cape

https://www.capesandbox.com/analysis/27628/

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