MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b6dcacaf75735e6be8c056532acf62de6bf3f58e7447b2e9dc1b0013605d9511. 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: 16


Intelligence 16 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b6dcacaf75735e6be8c056532acf62de6bf3f58e7447b2e9dc1b0013605d9511
SHA3-384 hash: c0b95e7a5e7c9a021e966aea74e69d3d3241863e088e5b042e90dedd0ffbcee97332ed9c69a49b4ff172a52160b7ec05
SHA1 hash: a63df78d1d644911da63e26ac58d70d79d361b37
MD5 hash: 7ad4d3e47a300591ee63e7ba99794bea
humanhash: harry-lactose-minnesota-july
File name:file
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:3'180'032 bytes
First seen:2025-11-16 21:18:46 UTC
Last seen:2025-11-16 21:22:29 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'742 x AgentTesla, 19'607 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 24576:sVGB+pyDst58j//MnhxcCSNzH52sb25W2S+fuXwfBAG9+pJxfeuJWqS2JT1SJZ:swJjnU7cpApfFfBaJx2uh1
Threatray 1 similar samples on MalwareBazaar
TLSH T1CBE56C343DEA501AB173EF7A8BE47ADAD95FB7733B06646A1050038A0B23981DDD253D
TrID 67.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
9.7% (.EXE) Win64 Executable (generic) (10522/11/4)
6.0% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.1% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
Reporter Bitsight
Tags:dropped-by-amadey exe fbf543 QuasarRAT


Avatar
Bitsight
url: http://178.16.55.189/files/762279693/rt1Z0zq.exe

Intelligence

File Origin
# of uploads :
3
# of downloads :
128
Origin country :
US US
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
file
Verdict:
Malicious activity
Analysis date:
2025-11-16 21:19:25 UTC
Tags:
evasion crypto-regex pulsar rat
Link:
https://app.any.run/tasks/8284100a-0418-4b88-9a96-c6dd589bc7c2

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/38399/
Verdict:
Malicious
Score:
95.7%
Link:
https://cyber-fortress.com/docs/result/index.php?id=691a3fdc434cd67b17c23fd1
Tags:
virus
Result
Verdict:
Malware
Maliciousness:

Behaviour
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Creating a window
Сreating synchronization primitives
Connection attempt
DNS request
Sending a custom TCP request
Using the Windows Management Instrumentation requests
Creating a file in the %AppData% subdirectories
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Tags:
base64
Link:
https://www.filescan.io/uploads/691a3fd853bda2a5d9f6f5a8/reports/da7ea0e1-0499-4387-a69a-58ed48e1a3da/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/b6dcacaf75735e6be8c056532acf62de6bf3f58e7447b2e9dc1b0013605d9511
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-11-16T18:31:00Z UTC
Last seen:
2025-11-17T10:20:00Z UTC
Hits:
~10
Detections:
Trojan.MSIL.Agent.sb Trojan-Dropper.Win32.Injector.sb PDM:Trojan.Win32.Generic HEUR:Trojan.MSIL.Quasar.gen Trojan-PSW.MSIL.Agent.sb Trojan.MSIL.Quasar.a Trojan.MSIL.Inject.sb Backdoor.MSIL.PulsarRAT.sb
Link:
https://opentip.kaspersky.com/b6dcacaf75735e6be8c056532acf62de6bf3f58e7447b2e9dc1b0013605d9511/results?tab=lookup
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/79acd59c-fd49-4a51-b9f0-338755e8a736
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b6dcacaf75735e6be8c056532acf62de6bf3f58e7447b2e9dc1b0013605d9511
Verdict:
inconclusive
YARA:
10 match(es)
Tags:
.Net Executable Managed .NET PE (Portable Executable) PE File Layout SOS: 0.49 Win 32 Exe x86
Link:
https://app.malva.re/file/7ad4d3e47a300591ee63e7ba99794bea
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b6dcacaf75735e6be8c056532acf62de6bf3f58e7447b2e9dc1b0013605d9511/
Verdict:
Malicious
Threat:
Family.QUASAR
Link:
https://tip.neiki.dev/file/b6dcacaf75735e6be8c056532acf62de6bf3f58e7447b2e9dc1b0013605d9511
Threat name:
Win32.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2025-11-16 21:19:23 UTC
File Type:
PE (.Net Exe)
Extracted files:
2
AV detection:
20 of 38 (52.63%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=w3okzl3vonpgx2gakzjsvt3c3zv7h5moord3f2o4dmabgyc5suiq._file
Verdict:
malicious
Label(s):
quasarrat
Create hunting rule
Similar samples:
b6dcacaf75735e6be8c056532acf62de6bf3f58e7447b2e9dc1b0013605d9511
QuasarRAT
error
QuasarRAT
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar discovery spyware trojan
Link:
https://tria.ge/reports/251116-z6a9wsxray/
Behaviour
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Quasar RAT
Quasar family
Quasar payload
Verdict:
Suspicious
Tags:
External_IP_Lookup
YARA:
n/a
Link:
https://app.threat.zone/submission/4fc0fa1c-f789-4e1e-bb63-d15131dc069d
Unpacked files
SH256 hash:
b6dcacaf75735e6be8c056532acf62de6bf3f58e7447b2e9dc1b0013605d9511
MD5 hash:
7ad4d3e47a300591ee63e7ba99794bea
SHA1 hash:
a63df78d1d644911da63e26ac58d70d79d361b37
Link:
https://www.unpac.me/results/ab773bc0-a42b-4442-8e51-713f989d661d/
SH256 hash:
50446b9e204da29d65e69b41674047a8ff5808f987dc7baa3ff0623e0ae1ab7b
MD5 hash:
14a8cadccd9951c8f335e81ab5e9aeec
SHA1 hash:
52dbc429cb43f6efeb1779f827270dec6cc68585
Detections:
QuasarRAT
Create hunting rule
cn_utf8_windows_terminal
Create hunting rule
malware_windows_xrat_quasarrat
Create hunting rule
MAL_BackNet_Nov18_1
Create hunting rule
INDICATOR_EXE_Packed_Fody
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
Create hunting rule
Link:
https://www.unpac.me/results/ab773bc0-a42b-4442-8e51-713f989d661d/
Malware family:
QuasarRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b6dcacaf7573/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.87
Link:
https://yomi.yoroi.company/submissions/b6dcacaf75735e6be8c056532acf62de6bf3f58e7447b2e9dc1b0013605d9511

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: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: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)

File information

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

Web download

QuasarRAT

Executable exe b6dcacaf75735e6be8c056532acf62de6bf3f58e7447b2e9dc1b0013605d9511

(this sample)

  
Dropped by
Amadey
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3710094/
Cape
Cape
https://www.capesandbox.com/analysis/38399/

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