MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 e41b36b6d92fc760256888c8cf9de47a28d79e8f3f8713b4ad1596d53d09f492. 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: 21


Intelligence 21 IOCs 1 YARA 28 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: e41b36b6d92fc760256888c8cf9de47a28d79e8f3f8713b4ad1596d53d09f492
SHA3-384 hash: 36001b1e6c72534e082cfd36568f751be40bc0fe84218857b4b5295b5c879c1c5c0b32115f513444e784f0c77bb57bed
SHA1 hash: a3881ac95e6c102f928a59990fabc969eb84f721
MD5 hash: 3f4c866f68140f59bfc92edabfbbf6a3
humanhash: cup-september-washington-oven
File name:r4tMpI3.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:3'266'048 bytes
First seen:2026-01-21 12:35:12 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'748 x AgentTesla, 19'652 x Formbook, 12'246 x SnakeKeylogger)
ssdeep 49152:mvkt62XlaSFNWPjljiFa2RoUYI4WxNESEgk/iELoGdzbiWGTHHB72eh2NT:mv462XlaSFNWPjljiFXRoUYIBx3Kj
TLSH T11EE55B143BF85F23E1BBE273D5B0041667F0E82AB3A3EB1B5191677E1C53B5058426AB
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:
41.216.188.90:8081

Indicators Of Compromise (IOCs)

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

IOCThreatFox Reference
41.216.188.90:8081 https://threatfox.abuse.ch/ioc/1734939/

Intelligence

File Origin
# of uploads :
1
# of downloads :
108
Origin country :
NL NL
Vendor Threat Intelligence
Details
Link:
https://research.acce.ciphertechsolutions.com/results/50f06298-f0a9-4ba7-ac39-45ed8eb3e5bd/
Malware family:
quasar
Create hunting rule
ID:
1
File name:
r4tMpI3.exe
Verdict:
Malicious activity
Analysis date:
2026-01-21 12:22:10 UTC
Tags:
auto-reg quasar
Link:
https://app.any.run/tasks/e9173e6d-d95d-4448-9996-ba7a1eb7db8a

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/49642/
Detection(s):
Win.Malware.Generic-9883083-0
Create hunting rule

Win.Malware.Msilheracles-9900242-0
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=6970c4f2bcad3327ec0739ab
Tags:
infosteal autorun quasar
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
base64 infostealer obfuscated obfuscated reconnaissance stealer
Link:
https://www.filescan.io/uploads/6970c81a55805a763fed239d/reports/f279c075-8872-445e-bdae-854173c91763/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/e41b36b6d92fc760256888c8cf9de47a28d79e8f3f8713b4ad1596d53d09f492
Result
Gathering data
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-01-20T22:33:00Z UTC
Last seen:
2026-01-21T00:19:00Z UTC
Hits:
~10
Detections:
PDM:Trojan.Win32.Tasker.cust PDM:Trojan.Win32.Generic Trojan-PSW.Win32.Stealer.sb Trojan-PSW.MSIL.Agent.sb Trojan.Win32.Quasar.sb Trojan.MSIL.Quasar.a HEUR:Trojan-Spy.MSIL.Agent.sb HEUR:Trojan.MSIL.Quasar.gen
Link:
https://opentip.kaspersky.com/e41b36b6d92fc760256888c8cf9de47a28d79e8f3f8713b4ad1596d53d09f492/results?tab=lookup
Malware family:
Quasar RAT
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/c75d996d-93e5-43f4-8cc3-56442c3d07c2
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1854831
Signature
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 Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1854831 Sample: r4tMpI3.exe Startdate: 21/01/2026 Architecture: WINDOWS Score: 100 33 ipwho.is 2->33 43 Suricata IDS alerts for network traffic 2->43 45 Found malware configuration 2->45 47 Malicious sample detected (through community Yara rule) 2->47 49 7 other signatures 2->49 9 r4tMpI3.exe 5 2->9         started        13 Updater.exe 3 2->13         started        signatures3 process4 file5 29 C:\Users\user\AppData\Roaming\...\Updater.exe, PE32 9->29 dropped 31 C:\Users\user\AppData\...\r4tMpI3.exe.log, CSV 9->31 dropped 51 Uses schtasks.exe or at.exe to add and modify task schedules 9->51 53 Hides that the sample has been downloaded from the Internet (zone.identifier) 9->53 15 Updater.exe 14 2 9->15         started        19 schtasks.exe 1 9->19         started        signatures6 process7 dnsIp8 35 41.216.188.90, 49715, 8081 AS40676US South Africa 15->35 37 ipwho.is 108.181.47.111, 443, 49717 ASN852CA Canada 15->37 39 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->39 41 Installs a global keyboard hook 15->41 21 schtasks.exe 1 15->21         started        23 WMIADAP.exe 18 10 15->23         started        25 conhost.exe 19->25         started        signatures9 process10 process11 27 conhost.exe 21->27         started       
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/e41b36b6d92fc760256888c8cf9de47a28d79e8f3f8713b4ad1596d53d09f492
Verdict:
inconclusive
YARA:
13 match(es)
Tags:
.Net Executable Managed .NET PE (Portable Executable) PE File Layout SOS: 0.31 Win 32 Exe x86
Link:
https://app.malva.re/file/3f4c866f68140f59bfc92edabfbbf6a3
Detection:
quasar
Create hunting rule
Link:
https://mwdb.cert.pl/sample/e41b36b6d92fc760256888c8cf9de47a28d79e8f3f8713b4ad1596d53d09f492/
Verdict:
Malicious
Threat:
Family.QUASARRAT
Link:
https://tip.neiki.dev/file/e41b36b6d92fc760256888c8cf9de47a28d79e8f3f8713b4ad1596d53d09f492
Threat name:
ByteCode-MSIL.Backdoor.Quasar
Create hunting rule
Status:
Malicious
First seen:
2026-01-21 12:22:24 UTC
File Type:
PE (.Net Exe)
Extracted files:
2
AV detection:
27 of 36 (75.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=4qntnnwzf7dwajlirdem7hpepiunphuph6drhnfncwlnkpij6sja._file
Verdict:
malicious
Label(s):
quasarrat
Create hunting rule
Similar samples:
error
QuasarRAT
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:crypter execution persistence spyware trojan
Link:
https://tria.ge/reports/260121-psrdvadw2g/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Executes dropped EXE
Quasar RAT
Quasar family
Quasar payload
Malware Config
C2 Extraction:
41.216.188.90:8081
Unpacked files
SH256 hash:
e41b36b6d92fc760256888c8cf9de47a28d79e8f3f8713b4ad1596d53d09f492
MD5 hash:
3f4c866f68140f59bfc92edabfbbf6a3
SHA1 hash:
a3881ac95e6c102f928a59990fabc969eb84f721
Detections:
QuasarRAT
Create hunting rule
Link:
https://www.unpac.me/results/d4f41699-4a52-46e0-940f-536c0dd8db57/
Malware family:
QuasarRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/e41b36b6d92f/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/e41b36b6d92fc760256888c8cf9de47a28d79e8f3f8713b4ad1596d53d09f492

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: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:FreddyBearDropper
Create hunting rule
Author:Dwarozh Hoshiar
Description:Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.
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: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
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: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: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
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:Windows_Generic_Threat_803feff4
Create hunting rule
Author:Elastic Security
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.

Cape
Cape
https://www.capesandbox.com/analysis/49642/

Comments