MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b108344a4bdd297bc875c4da54162c753b1b104abb1e5383b2ed348fea2a0eea. 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: 17

Intelligence 17 IOCs YARA 20 File information Comments

SHA256 hash:	b108344a4bdd297bc875c4da54162c753b1b104abb1e5383b2ed348fea2a0eea
SHA3-384 hash:	191e41d536f16169913b815c25f3e92b5038a274b18a3c6cfd7261f6dadcb4642ac8e588a230846f5fbeab50eaed6803
SHA1 hash:	5d9c9b6b03d7ba016c45c2b596e39857545d365c
MD5 hash:	2de2cbb979a3b9291b5343339a87a304
humanhash:	alaska-red-avocado-saturn
File name:	Client-built.exe
Download:	download sample
Signature	QuasarRAT Create hunting rule
File size:	4'623'872 bytes
First seen:	2024-03-19 07:42:13 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'662 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep	49152:y0wO2S0vjTqpi90TCJ/TCr3xBooZEKZ+WijUs+9VBMsXUK/2HHBX2ehgNTIGs0:y0m/vjTqgGr3xfZF+W4X+80
Threatray	554 similar samples on MalwareBazaar
TLSH	T131266C14ABF88E26D9AF9776E5B2040257F1F89D7363DB0B2580B6BD2C43B504E413A7
TrID	37.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 29.5% (.CPL) Windows Control Panel Item (generic) (57583/11/19) 8.4% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5) 6.7% (.SCR) Windows screen saver (13097/50/3) 5.3% (.EXE) Win64 Executable (generic) (10523/12/4)
Reporter	likeastar20
Tags:	exe QuasarRAT RAT

Intelligence

File Origin

# of uploads :

# of downloads :

371

Origin country :

Vendor Threat Intelligence

Malware family:

asyncrat

ID:

File name:

Client-built.exe

Verdict:

Malicious activity

Analysis date:

2024-03-18 23:53:49 UTC

Tags:

rat asyncrat remote quasar

Link:

https://app.any.run/tasks/20b9b38f-229a-4622-882d-56f9a9286636

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Detection(s):

Win.Packed.Msilperseus-9956591-0

Win.Packed.Msilperseus-9956592-0

ditekSHen.MALWARE.Win.Trojan.QuasarStealer.UNOFFICIAL

Win.Packed.Downeks-6898097-0

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Сreating synchronization primitives

DNS request

Connection attempt

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-vm certreq expand keylogger lolbin njrat quasar quasarrat rat remote schtasks

Link:

https://www.filescan.io/uploads/65f9420787137159d449c0b2/reports/02986127-bed7-4179-befc-550dd65dbdbf/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_90%

Link:

https://www.hybrid-analysis.com/sample/b108344a4bdd297bc875c4da54162c753b1b104abb1e5383b2ed348fea2a0eea

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.

Malware family:

Quasar RAT

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/8561c291-dbcb-485e-96ea-38405c073c8a

Result

Threat name:

Quasar, SugarDump

Detection:

malicious

Classification:

troj.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1411483

Signature

Antivirus / Scanner detection for submitted sample

Antivirus detection for URL or domain

C2 URLs / IPs found in malware configuration

Found malware configuration

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

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Uses dynamic DNS services

Yara detected Generic Downloader

Yara detected Quasar RAT

Yara detected SugarDump

Behaviour

Behavior Graph:

Download SVG

Score:

19%

Verdict:

Benign

File Type:

Link:

https://malprob.io/report/b108344a4bdd297bc875c4da54162c753b1b104abb1e5383b2ed348fea2a0eea

Detection:

quasar

Link:

https://mwdb.cert.pl/sample/b108344a4bdd297bc875c4da54162c753b1b104abb1e5383b2ed348fea2a0eea/

Threat name:

ByteCode-MSIL.Trojan.Quasar

Status:

Malicious

First seen:

2024-03-19 07:43:06 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

18 of 24 (75.00%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=weedissl3uuxxsdvytnfifrmou5rweckxmpfha5s5u2i72rkb3va._file

Verdict:

malicious

QuasarRAT

3ad07a1878c8b77f9fc0143d8f88c240d8d0b986d015d4c0cd881ad9c0d572e1

QuasarRAT

9eefa45ebc884b3b6fa4349d140963700c9f2c2543840d965b11c7f815346ab9

QuasarRAT

b108344a4bdd297bc875c4da54162c753b1b104abb1e5383b2ed348fea2a0eea

QuasarRAT

ced760664a7c5580e324d99d695b119c1f3ec94d1d9c56d1d3882347f0c6eb10

QuasarRAT

+ 544 additional samples on MalwareBazaar

Result

Malware family:

quasar

Score:

10/10

Tags:

family:quasar botnet:office04 spyware trojan

Link:

https://tria.ge/reports/240319-jj8zmsdg97/

Behaviour

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Enumerates physical storage devices

Quasar RAT

Quasar payload

Malware Config

C2 Extraction:

acehere.duckdns.org:5937

Unpacked files

SH256 hash:

b108344a4bdd297bc875c4da54162c753b1b104abb1e5383b2ed348fea2a0eea

MD5 hash:

2de2cbb979a3b9291b5343339a87a304

SHA1 hash:

5d9c9b6b03d7ba016c45c2b596e39857545d365c

Detections:

QuasarRAT

malware_windows_xrat_quasarrat

win_quasarrat_j2

cn_utf8_windows_terminal

INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

MAL_QuasarRAT_May19_1

INDICATOR_SUSPICIOUS_Binary_References_Browsers

Quasar_RAT_1

Link:

https://www.unpac.me/results/c8785938-8a8d-4cd8-9da1-7cf506b420e8/

Malware family:

QuasarRAT

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/b108344a4bdd/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/b108344a4bdd297bc875c4da54162c753b1b104abb1e5383b2ed348fea2a0eea

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:	BLOWFISH_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for Blowfish constants

Rule name:	INDICATOR_SUSPICIOUS_Binary_References_Browsers Create hunting rule
Author:	ditekSHen
Description:	Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

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

Rule name:	MAL_QuasarRAT_May19_1 Create hunting rule
Description:	Detects QuasarRAT malware

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:	MD5_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for MD5 constants

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:	Njrat Create hunting rule
Author:	botherder https://github.com/botherder
Description:	Njrat

Rule name:	pe_imphash Create hunting rule

Rule name:	Quasar_RAT_1 Create hunting rule
Author:	Florian Roth (Nextron Systems)
Description:	Detects Quasar RAT
Reference:	https://www.pwc.co.uk/cyber-security/pdf/cloud-hopper-annex-b-final.pdf

Rule name:	Quasar_RAT_1 Create hunting rule
Author:	@SOCRadar
Description:	Detects Quasar RAT

Rule name:	Quasar_RAT_1_RID2B54 Create hunting rule
Author:	Florian Roth
Description:	Detects Quasar RAT
Reference:	https://www.pwc.co.uk/cyber-security/pdf/cloud-hopper-annex-b-final.pdf

Rule name:	RC6_Constants Create hunting rule
Author:	chort (@chort0)
Description:	Look for RC6 magic constants in binary
Reference:	https://twitter.com/mikko/status/417620511397400576

Rule name:	RIPEMD160_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for RIPEMD-160 constants

Rule name:	SHA1_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for SHA1 constants

Rule name:	SHA512_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for SHA384/SHA512 constants

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

File information

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

No further information available

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 (HIGH_ENTROPY_VA)	high

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