MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a77fed3715f635883d0e54c30ab4d3ccad5afe0f845d27e5bff0f9410df4aaee. 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: 14

Intelligence 14 IOCs YARA 12 File information Comments

SHA256 hash:	a77fed3715f635883d0e54c30ab4d3ccad5afe0f845d27e5bff0f9410df4aaee
SHA3-384 hash:	929221e4168e832a3fbbffcdb8c8acf9c0b4090f1708cb6c9cb97e8e60635949f25f38c8aad5ef9e81f55f1c7d5aaa7a
SHA1 hash:	6f0410e654c8017a0f3b3f170d71f19fa1dcaa50
MD5 hash:	cb8c94401e839b730b97dc5339bec791
humanhash:	helium-angel-butter-florida
File name:	cb8c94401e839b730b97dc5339bec791.exe
Download:	download sample
Signature	QuasarRAT Create hunting rule
File size:	1'972'224 bytes
First seen:	2025-06-06 05:43:18 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'748 x AgentTesla, 19'652 x Formbook, 12'246 x SnakeKeylogger)
ssdeep	24576:gDA8DvSWeWBRYRR1qJvHIPbcNE0KKSb7yviUSQaBaOwIRxl2S62/9HEoV0brR7X5:6Z7YReEwKKSb7L3wip6AEK
Threatray	38 similar samples on MalwareBazaar
TLSH	T11D95BF2439EA801AF1B7AF75DBD074CA9B7EF223771A964E145103460E63B41EDC723A
TrID	58.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 13.2% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5) 8.4% (.EXE) Win64 Executable (generic) (10522/11/4) 5.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.0% (.EXE) Win16 NE executable (generic) (5038/12/1)
Magika	pebin
Reporter	abuse_ch
Tags:	exe QuasarRAT

Intelligence

File Origin

# of uploads :

# of downloads :

435

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

cb8c94401e839b730b97dc5339bec791.exe

Verdict:

Malicious activity

Analysis date:

2025-06-06 05:58:37 UTC

Tags:

uac pastebin crypto-regex

Link:

https://app.any.run/tasks/c1eb2055-c61c-43eb-a539-11afd7733a5b

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/7626/

Detection(s):

Win.Malware.Generic-9883083-0

Win.Malware.Bulz-9933026-0

Win.Malware.Generic-6623004-0

Verdict:

Malicious

Score:

99.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=684280c48bd5d68a12e5d9b0

Tags:

emotet virus msil remo

Result

Verdict:

Suspicious

Maliciousness:

Behaviour

Creating a window

Сreating synchronization primitives

DNS request

Connection attempt

Sending a custom TCP request

Connection attempt to an infection source

Sending a TCP request to an infection source

Query of malicious DNS domain

Verdict:

Malicious

Labled as:

MSIL.Krypt.Generic

Link:

https://www.hybrid-analysis.com/sample/a77fed3715f635883d0e54c30ab4d3ccad5afe0f845d27e5bff0f9410df4aaee

Result

Verdict:

MALICIOUS

Details

Windows PE Executable

Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/7850a777-910a-4a12-b74a-94bcb85adfbd

Result

Threat name:

Quasar

Detection:

malicious

Classification:

troj.evad

Score:

84 / 100

Link:

https://www.joesandbox.com/analysis/1707887

Signature

.NET source code contains potential unpacker

Connects to a pastebin service (likely for C&C)

Found malware configuration

Hides that the sample has been downloaded from the Internet (zone.identifier)

Joe Sandbox ML detected suspicious sample

Multi AV Scanner detection for submitted file

Sample uses string decryption to hide its real strings

Yara detected Quasar RAT

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/a77fed3715f635883d0e54c30ab4d3ccad5afe0f845d27e5bff0f9410df4aaee

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/a77fed3715f635883d0e54c30ab4d3ccad5afe0f845d27e5bff0f9410df4aaee/

Threat name:

ByteCode-MSIL.Backdoor.FormBook

Status:

Malicious

First seen:

2025-06-02 05:29:18 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

30 of 36 (83.33%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=u5762nyv6y2yqpioktbqvngtzswvv7qpqrospzn76d4ucdpuvlxa._file

Verdict:

malicious

Label(s):

quasarrat

QuasarRAT

2adbf68e583680bf9804404c43990adf4f011783f4f1cdddcc9afb67039a16a8

QuasarRAT

368989934389f9101ee031231304d2544a5bd55ae3626bdba993451715558d7e

QuasarRAT

50cb6b8d0f572cd355d682a3f3529854b98cc75e141e452c98bec0279ef1ace2

QuasarRAT

603df24ca191abf2f3d7b573b89726a251ea171cb898b4a4cb7b1ffc86c2245b

QuasarRAT

a77fed3715f635883d0e54c30ab4d3ccad5afe0f845d27e5bff0f9410df4aaee

QuasarRAT

e3028ecd7637653dda1250fa2925e143796e385cda98191f04eec0681fd0c826

QuasarRAT

error

QuasarRAT

+ 28 additional samples on MalwareBazaar

Result

Malware family:

n/a

Score:

6/10

Tags:

n/a

Link:

https://tria.ge/reports/250606-gfbtmacl6t/

Behaviour

Suspicious behavior: AddClipboardFormatListener

Suspicious use of AdjustPrivilegeToken

Legitimate hosting services abused for malware hosting/C2

Verdict:

Malicious

Tags:

Win.Malware.Generic-9883083-0

YARA:

n/a

Link:

https://app.threat.zone/submission/a43632f9-8c07-42b7-a087-8fa2c8ea862b

Unpacked files

SH256 hash:

a77fed3715f635883d0e54c30ab4d3ccad5afe0f845d27e5bff0f9410df4aaee

MD5 hash:

cb8c94401e839b730b97dc5339bec791

SHA1 hash:

6f0410e654c8017a0f3b3f170d71f19fa1dcaa50

Link:

https://www.unpac.me/results/11f628fd-8400-431b-a32a-01d9eef2b510/

SH256 hash:

a0af255ea4b09a8cdb995b8c6fd1075e46f098e23c2351c974e6ded9b8b620cf

MD5 hash:

c52a44933d17d576d4c97b4cb0545841

SHA1 hash:

092696fdcc034910aa02c94a5c93f4e1e86e0c50

Detections:

SUSP_NET_Large_Static_Array_In_Small_File_Jan24

Link:

https://www.unpac.me/results/11f628fd-8400-431b-a32a-01d9eef2b510/

Parent samples :
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SH256 hash:

4c9615496970ea84320e2a6e99f8fb828e3c7790384df5585d93fc368885d94e

MD5 hash:

50e6524b7ee9c2c93f5210b63cb1ca54

SHA1 hash:

3e296ec3bb24750833ea80515e6fb4c73874c91a

Link:

https://www.unpac.me/results/11f628fd-8400-431b-a32a-01d9eef2b510/

SH256 hash:

e94ccf1aef8652612dedf3c0a5c1b40a4197eecadc12c0a60767ace2748fd587

MD5 hash:

9b2b974de7ca2375c12a3e8de556e456

SHA1 hash:

4304c42ffdf310bbf52cd5961e71b70facddab23

Link:

https://www.unpac.me/results/11f628fd-8400-431b-a32a-01d9eef2b510/

SH256 hash:

a5de012f7e0782e7c7efb2570ab9d832eb0dbf6dcb9ea047853c1eb7caf37ef7

MD5 hash:

929a8cfeea12fdeac5dbfb89c7287387

SHA1 hash:

85a28762584d4b946375b38c88a27ef742617d4d

Link:

https://www.unpac.me/results/11f628fd-8400-431b-a32a-01d9eef2b510/

SH256 hash:

bc0243134c93c55ea105d0e9c2a43b6030e973290d0a061cf3a61986a2268a88

MD5 hash:

d2edde626c241549eab636aa87fb5d38

SHA1 hash:

8d836febd477b3ec44cc37f4f0aecdaa1d7db788

Link:

https://www.unpac.me/results/11f628fd-8400-431b-a32a-01d9eef2b510/

SH256 hash:

e5ac7c0e3829dc381f8cded631fa19f8d18540d1d8917da0e66519c474139148

MD5 hash:

82d9f971c1881dd6573d31322dffe29e

SHA1 hash:

ef92594a50126f4d6968bd13e2fcd8fee4110558

Detections:

SUSP_NET_Large_Static_Array_In_Small_File_Jan24

HKTL_NET_GUID_Quasar

Link:

https://www.unpac.me/results/11f628fd-8400-431b-a32a-01d9eef2b510/

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/a77fed3715f635883d0e54c30ab4d3ccad5afe0f845d27e5bff0f9410df4aaee

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

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

Rule name:	NET 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)

Rule name:	Sus_Obf_Enc_Spoof_Hide_PE Create hunting rule
Author:	XiAnzheng
Description:	Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

File information

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

Cape

https://www.capesandbox.com/analysis/7626/

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings

ID	Title	Severity
CHECK_AUTHENTICODE	Missing Authenticode	high
CHECK_DLL_CHARACTERISTICS	Missing dll Security Characteristics (GUARD_CF)	high

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