MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f1fe3f793ad91f0be6a2574b98423ad51e5d38eb226be004c1004478d5d8c386. 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: 18


Intelligence 18 IOCs YARA 37 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f1fe3f793ad91f0be6a2574b98423ad51e5d38eb226be004c1004478d5d8c386
SHA3-384 hash: 1f8bdc98eb7fd5e87712fc5b10ffdb0ac51515c2d63d85a506e6d2d847585627ea3eba8219353d757afc6b32a3bea2e2
SHA1 hash: 91c587d57766aa6a65dd0c8e525542385590b327
MD5 hash: 143e96b74e979c51ebd8f9f082c9a812
humanhash: sad-july-eleven-quebec
File name:Client.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:319'488 bytes
First seen:2025-11-23 00:10:25 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'873 x AgentTesla, 19'796 x Formbook, 12'305 x SnakeKeylogger)
ssdeep 6144:P7zO0LSclT6FOwEP5Kq+SMv0VGb7bDcllbkhn:XlJtTF9zVGkllbk1
Threatray 683 similar samples on MalwareBazaar
TLSH T18A644A2527F8A93BD8BE17B4F53141094B76FC07B517F38E6A5818B82C1A38985937E3
TrID 46.3% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
19.7% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
10.4% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5)
6.6% (.EXE) Win64 Executable (generic) (10522/11/4)
4.1% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
Magika pebin
Reporter Hexastrike
Tags:exe QuasarRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
113
Origin country :
IE IE
Vendor Threat Intelligence
Malware family:
quasar
Create hunting rule
ID:
1
File name:
Client.exe
Verdict:
Malicious activity
Analysis date:
2025-11-23 10:26:19 UTC
Tags:
quasar
Link:
https://app.any.run/tasks/3bc9513d-6940-4a69-b19b-ee268b62130e

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/39980/
Detection(s):
Win.Trojan.Barys-1
Create hunting rule

Win.Packed.Generic-9830106-0
Create hunting rule

Win.Packed.QuasarRAT-10012744-0
Create hunting rule

Win.Trojan.Generic-6295765-0
Create hunting rule

Win.Malware.Generic-6623004-0
Create hunting rule

Win.Trojan.Generic-6898101-0
Create hunting rule

Win.Trojan.Generic-6898102-0
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=692263bd140de26f6c2c710c
Tags:
vmdetect quasar
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a custom TCP request
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm anti-vm base64 blackshades byteguard cmd crypto fingerprint infostealer keylogger lolbin obfuscated packed quasar rat reconnaissance runonce schtasks stealer vbnet vermin xrat
Link:
https://www.filescan.io/uploads/69225ee3eecb08e4aa4531c2/reports/7e60900a-bb23-4cdc-ba5e-355d5b845eca/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/f1fe3f793ad91f0be6a2574b98423ad51e5d38eb226be004c1004478d5d8c386
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-11-10T07:09:00Z UTC
Last seen:
2025-11-10T20:57:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/f1fe3f793ad91f0be6a2574b98423ad51e5d38eb226be004c1004478d5d8c386/results?tab=lookup
Gathering data
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/f1fe3f793ad91f0be6a2574b98423ad51e5d38eb226be004c1004478d5d8c386
Verdict:
QuasarRat
YARA:
17 match(es)
Tags:
.Net Executable Malicious Managed .NET PE (Portable Executable) PE Memory-Mapped (Dump) QuasarRat RAT SOS: 0.26
Malware Config
C2 Extraction:
PORT:
CNC: 135.181.121.237
PORT:
CNC: 135.181.121.237
Link:
https://app.malva.re/file/143e96b74e979c51ebd8f9f082c9a812
Detection:
quasar
Create hunting rule
Link:
https://mwdb.cert.pl/sample/f1fe3f793ad91f0be6a2574b98423ad51e5d38eb226be004c1004478d5d8c386/
Threat name:
ByteCode-MSIL.Backdoor.Quasar
Create hunting rule
Status:
Malicious
First seen:
2025-11-10 12:04:45 UTC
File Type:
PE (.Net Exe)
Extracted files:
3
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=6h7d66j23epqxzvck5fzqqr22upf2ohlejv6abgbabchrvoyyoda._file
Verdict:
malicious
Label(s):
quasarrat
Create hunting rule
Similar samples:
3764d5269cce0d687d2004f7ded8672abffe660a3140e046a8265ecb89053049
QuasarRAT
49d3a6363261b6915cf925e115234347ea4d4bb1bfe603a52a58d764eb266f87
QuasarRAT
80d8926421adb3426b815a4851c5a560cb65dcc73dfb45a56bc9d555fcb3bcf6
QuasarRAT
9d737c768d419aed55de299a114fb8b4928d263320caa4b35c08f4c0bb3fcb88
QuasarRAT
dabe0f83548baa1bbece033284676e56caff0eea881740218443b390c4e71680
QuasarRAT
error
QuasarRAT
f1fe3f793ad91f0be6a2574b98423ad51e5d38eb226be004c1004478d5d8c386
QuasarRAT
+ 673 additional samples on MalwareBazaar
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:office discovery spyware trojan
Link:
https://tria.ge/reports/251123-bjag3sgq2w/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies data under HKEY_USERS
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Browser Information Discovery
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Drops file in Windows directory
Quasar RAT
Quasar family
Quasar payload
Malware Config
C2 Extraction:
135.181.121.237:111
Verdict:
Unknown
Tags:
rat quasar_rat vermin
YARA:
JPCERTCC_Quasar MALWARE_Win_QuasarRAT MAL_QuasarRAT_May19_1 Quasar_RAT_1 Quasar_RAT_2 Vermin_Keylogger_Jan18_1 Windows_Trojan_Quasarrat_e52df647 malware_Quasar_strings malware_windows_quasarrat win_quasar_rat_client
Link:
https://app.threat.zone/submission/8ad8e9b7-9f88-44d7-bbbe-eb6180259b6b
Unpacked files
SH256 hash:
f1fe3f793ad91f0be6a2574b98423ad51e5d38eb226be004c1004478d5d8c386
MD5 hash:
143e96b74e979c51ebd8f9f082c9a812
SHA1 hash:
91c587d57766aa6a65dd0c8e525542385590b327
Detections:
win_blackshades_w0
Create hunting rule
QuasarRAT
Create hunting rule
Link:
https://www.unpac.me/results/e303c651-296e-4fb4-8511-6769ecd86c6b/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.56
Link:
https://yomi.yoroi.company/submissions/f1fe3f793ad91f0be6a2574b98423ad51e5d38eb226be004c1004478d5d8c386

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:BlackShades_4
Create hunting rule
Author:Jean-Philippe Teissier / @Jipe_
Description:BlackShades
Rule name:CN_disclosed_20180208_KeyLogger_1
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects malware from disclosed CN malware set
Reference:https://www.virustotal.com/graph/#/selected/n120z79z208z189/drawer/graph-details
Rule name:CN_disclosed_20180208_KeyLogger_1_RID3227
Create hunting rule
Author:Florian Roth
Description:Detects malware from disclosed CN malware set
Reference:https://www.virustotal.com/graph/#/selected/n120z79z208z189/drawer/graph-details
Rule name:DebuggerCheck__API
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: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:INDICATOR_SUSPICIOUS_GENRansomware
Create hunting rule
Author:ditekSHen
Description:Detects command variations typically used by ransomware
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_Quasar_strings
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect QuasarRAT in memory
Rule name:MALWARE_Win_QuasarRAT
Create hunting rule
Author:ditekSHen
Description:QuasarRAT payload
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:pe_imphash
Create hunting rule
Rule name:Quasar
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect QuasarRAT in memory
Rule name:QuasarRAT
Create hunting rule
Author:ditekshen
Description:QuasarRAT payload
Rule name:quasarrat
Create hunting rule
Author:jeFF0Falltrades
Rule name:quasarrat_kingrat
Create hunting rule
Author:jeFF0Falltrades
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:Quasar_RAT_2
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_2
Create hunting rule
Description:Detects Quasar RAT
Rule name:Quasar_RAT_2_RID2B55
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: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:Windows_Trojan_Quasarrat_e52df647
Create hunting rule
Author:Elastic Security
Rule name:win_blackshades_w0
Create hunting rule
Author:Jean-Philippe Teissier / @Jipe_
Rule name:win_quasar_rat_client
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in Quasar Rat Samples.
Rule name:xRAT_1
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects Patchwork malware
Reference:https://goo.gl/Pg3P4W
Rule name:xRAT_1_RID2900
Create hunting rule
Author:Florian Roth
Description:Detects Patchwork malware
Reference:https://goo.gl/Pg3P4W

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/39980/

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