MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a6640f14b119df661bb6d99d1e16a07a5d0f609c5d4ea3375ef3fa74bcab8d14. 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: 20


Intelligence 20 IOCs 1 YARA 22 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a6640f14b119df661bb6d99d1e16a07a5d0f609c5d4ea3375ef3fa74bcab8d14
SHA3-384 hash: f0e459f0eb7d3c275536a5953d23b0912c8a2b1f70dc435da18d79cc03c892a56ed2ff3c790cbcaec8b267ecc7c8c76a
SHA1 hash: 04fd9554e18e80ab9c7f090e1f4c5d7f4e961579
MD5 hash: 7c26de59ad48e07090ff995d732b5e91
humanhash: six-eight-cold-pasta
File name:client.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:514'048 bytes
First seen:2025-08-25 19:55:05 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'854 x AgentTesla, 19'783 x Formbook, 12'304 x SnakeKeylogger)
ssdeep 6144:xTEgdc0YFX7IxUpGREWPOhYUZTP0bC2cE38b8F9STsMsGD2N6icTR3y:xTEgdfY+xUCw2HnZi2N6icdy
Threatray 1'360 similar samples on MalwareBazaar
TLSH T14EB46B4023F8862BE5BF5779E87105205BF9F407B26BFB5F4541B0E92CA67069E40BA3
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 RAT


Avatar
abuse_ch
QuasarRAT C2:
45.81.113.187:1604

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
45.81.113.187:1604 https://threatfox.abuse.ch/ioc/1569108/

Intelligence

File Origin
# of uploads :
1
# of downloads :
85
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
amadey
Create hunting rule
ID:
1
File name:
bomb.exe
Verdict:
Malicious activity
Analysis date:
2025-08-25 16:57:38 UTC
Tags:
auto coinminer miner hausbomber loader autoit generic amadey evasion snake keylogger botnet stealer ultravnc rmm-tool telegram redline exfiltration smtp lumma github payload meterpreter backdoor metasploit phishing ta558 apt stegocampaign framework reverseloader bittorrent mozi rhadamanthys tinynuke quasar rat xenorat remote masslogger havoc tool stealc purecrypter vidar sliver gcleaner anti-evasion modiloader xworm pastebin vipkeylogger xtinyloader nanocore adware formbook cobaltstrike svc metastealer agenttesla clipper diamotrix python auto-sch-xml asyncrat dcrat frp anydesk ddr purelogsstealer
Link:
https://app.any.run/tasks/612e21f3-1ce0-46f7-b87c-04e6a9b76ffc

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
QuasarRAT
Create hunting rule
Link:
https://www.capesandbox.com/analysis/23504/
Detection(s):
Win.Malware.Bulz-9823462-0
Create hunting rule

Win.Malware.Generic-9883082-0
Create hunting rule

Win.Malware.Generic-9883083-0
Create hunting rule

ditekSHen.MALWARE.Win.Trojan.QuasarStealer.UNOFFICIAL
Create hunting rule

Win.Packed.Downeks-6898097-0
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68acbfd53e988eb6ab82b611
Tags:
infosteal autorun quasar
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Creating a file in the %AppData% subdirectories
Launching a process
Enabling autorun by creating a file
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/a6640f14b119df661bb6d99d1e16a07a5d0f609c5d4ea3375ef3fa74bcab8d14
Verdict:
Malicious
File Type:
exe x32
Link:
https://opentip.kaspersky.com/a6640f14b119df661bb6d99d1e16a07a5d0f609c5d4ea3375ef3fa74bcab8d14/results?tab=lookup
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/bab07ccc-93be-4f3b-b2e5-5db1f0b4ac72
Result
Threat name:
AsyncRAT, Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1764883
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Installs a global keyboard hook
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sample uses string decryption to hide its real strings
Suricata IDS alerts for network traffic
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AsyncRAT
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1764883 Sample: client.exe Startdate: 25/08/2025 Architecture: WINDOWS Score: 100 41 tools.keycdn.com 2->41 43 api.ipify.org 2->43 59 Suricata IDS alerts for network traffic 2->59 61 Found malware configuration 2->61 63 Malicious sample detected (through community Yara rule) 2->63 65 7 other signatures 2->65 9 client.exe 5 2->9         started        13 client.exe 2 2->13         started        signatures3 process4 file5 37 C:\Users\user\AppData\Roaming\...\client.exe, PE32 9->37 dropped 39 C:\Users\user\AppData\...\client.exe.log, CSV 9->39 dropped 67 Uses schtasks.exe or at.exe to add and modify task schedules 9->67 69 Hides that the sample has been downloaded from the Internet (zone.identifier) 9->69 15 client.exe 14 2 9->15         started        19 schtasks.exe 1 9->19         started        21 client.exe 2 13->21         started        23 schtasks.exe 1 13->23         started        signatures6 process7 dnsIp8 45 45.81.113.187, 1604, 49719, 49723 MEER-ASmeerfarbigGmbHCoKGDE Ukraine 15->45 47 tools.keycdn.com 185.172.148.96, 443, 49721, 49725 PROINITYPROINITYDE Germany 15->47 51 Antivirus detection for dropped file 15->51 53 Multi AV Scanner detection for dropped file 15->53 55 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->55 25 schtasks.exe 1 15->25         started        27 conhost.exe 19->27         started        49 api.ipify.org 104.26.12.205, 443, 49726 CLOUDFLARENETUS United States 21->49 57 Installs a global keyboard hook 21->57 29 schtasks.exe 1 21->29         started        31 conhost.exe 23->31         started        signatures9 process10 process11 33 conhost.exe 25->33         started        35 conhost.exe 29->35         started       
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/a6640f14b119df661bb6d99d1e16a07a5d0f609c5d4ea3375ef3fa74bcab8d14
Verdict:
QuasarRat
YARA:
13 match(es)
Tags:
.Net Executable Malicious Managed .NET PE (Portable Executable) PE File Layout QuasarRat RAT SOS: 0.32 Win 32 Exe x86
Malware Config
C2 Extraction:
PORT: 16
CNC: 45.81.113.187
Link:
https://app.malva.re/file/7c26de59ad48e07090ff995d732b5e91
Detection:
quasar
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a6640f14b119df661bb6d99d1e16a07a5d0f609c5d4ea3375ef3fa74bcab8d14/
Threat name:
ByteCode-MSIL.Backdoor.Quasar
Create hunting rule
Status:
Malicious
First seen:
2025-08-25 17:15:17 UTC
File Type:
PE (.Net Exe)
Extracted files:
2
AV detection:
30 of 36 (83.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=uzsa6ffrdhpwmg5w3gor4fvapjoq6ye4lvhkgn266p5hjpflruka._file
Verdict:
malicious
Label(s):
quasarrat
Create hunting rule
Similar samples:
0ae8c5022567fc8588fdc2fbf27d1d245f7e9bb15a23cb8a01962be6b51cb73c
QuasarRAT
1416bd55b04a4d8299c3e976e4e6a160850471e330d25f332f70d8ca618de894
QuasarRAT
37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf
QuasarRAT
a6640f14b119df661bb6d99d1e16a07a5d0f609c5d4ea3375ef3fa74bcab8d14
QuasarRAT
cd425ba34aa2ac7f31b6c498b09780cd7bacb7d7826cdc119fd6a35e95ee8700
QuasarRAT
error
QuasarRAT
+ 1'350 additional samples on MalwareBazaar
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:sigorta defense_evasion execution persistence spyware trojan
Link:
https://tria.ge/reports/250825-ynk6psen6s/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Looks up external IP address via web service
Executes dropped EXE
Modifies trusted root certificate store through registry
Quasar RAT
Quasar family
Quasar payload
Malware Config
C2 Extraction:
45.81.113.187:1604
Verdict:
Malicious
Tags:
stealer rat quasar_rat vermin Win.Malware.Bulz-9823462-0
YARA:
MALWARE_Win_Quasarstealer MAL_QuasarRAT_May19_1 Vermin_Keylogger_Jan18_1 malware_windows_quasarrat win_quasar_rat_client
Link:
https://app.threat.zone/submission/ed81d56a-de31-4473-bf24-84446a0d70e2
Unpacked files
SH256 hash:
a6640f14b119df661bb6d99d1e16a07a5d0f609c5d4ea3375ef3fa74bcab8d14
MD5 hash:
7c26de59ad48e07090ff995d732b5e91
SHA1 hash:
04fd9554e18e80ab9c7f090e1f4c5d7f4e961579
Detections:
QuasarRAT
Create hunting rule
Link:
https://www.unpac.me/results/ff2a541b-4e0e-4df2-abaa-d13208fc2b2a/
Malware family:
QuasarRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a6640f14b119/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/a6640f14b119df661bb6d99d1e16a07a5d0f609c5d4ea3375ef3fa74bcab8d14

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: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: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:INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
Create hunting rule
Author:ditekSHen
Description:Detects Windows executables referencing non-Windows User-Agents
Rule name:INDICATOR_SUSPICIOUS_GENInfoStealer
Create hunting rule
Author:ditekSHen
Description:Detects executables containing common artifacts observed in infostealers
Rule name:Lumma_Stealer_Detection
Create hunting rule
Author:ashizZz
Description:Detects a specific Lumma Stealer malware sample using unique strings and behaviors
Reference:https://seanthegeek.net/posts/compromized-store-spread-lumma-stealer-using-fake-captcha/
Rule name:MALWARE_Win_QuasarStealer
Create hunting rule
Author:ditekshen
Description:Detects Quasar infostealer
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
Create hunting rule
Description:Detects QuasarRAT malware
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:quasarrat
Create hunting rule
Author:jeFF0Falltrades
Rule name:quasarrat_kingrat
Create hunting rule
Author:jeFF0Falltrades
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:Vermin_Keylogger_Jan18_1
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects Vermin Keylogger
Reference:https://researchcenter.paloaltonetworks.com/2018/01/unit42-vermin-quasar-rat-custom-malware-used-ukraine/
Rule name:win_quasar_rat_client
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in Quasar Rat Samples.

File information

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

Web download

QuasarRAT

Executable exe a6640f14b119df661bb6d99d1e16a07a5d0f609c5d4ea3375ef3fa74bcab8d14

(this sample)

Cape
Cape
https://www.capesandbox.com/analysis/23504/
  
URLhaus
https://urlhaus.abuse.ch/url/3609843/
  
Delivery method
Distributed via web download

Comments