MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 cb91a07bcde29ad710bcc98259ea71f15b4a0fe65082fa6481ab8ac8b8b641e0. 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 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: cb91a07bcde29ad710bcc98259ea71f15b4a0fe65082fa6481ab8ac8b8b641e0
SHA3-384 hash: b53be0f2c69feaa8cd8e47900921862f3bdd4e156c3e6bb4044de8f5fd20c3bd3c57587a8fe466ccf866eb967dec0038
SHA1 hash: 940c01dd0cd625b8b3fab93e57614cb36d464c7a
MD5 hash: 60eb9c7500e862b147abe91eae94579c
humanhash: twenty-steak-purple-sink
File name:q8d90.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:264'446 bytes
First seen:2025-07-27 11:37:40 UTC
Last seen:2025-08-02 22:55:15 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'471 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 3072:44NpVq8BxFRzaqF+o2GQJ7/JzqVfGvq/qieg9okIrVueJ0oFFKjX5myEZpv+LuTb:4gVqwlLx9eg9okROFQjjEZpTpm0wMJ
TLSH T16F446B6A8EEBB242C5425474B93363814A7D1F75A5CF35518EF33FAD4AF3CA521230A2
TrID 52.9% (.EXE) Win32 Executable (generic) (4504/4/1)
23.5% (.EXE) Generic Win/DOS Executable (2002/3)
23.5% (.EXE) DOS Executable Generic (2000/1)
Magika pebin
dhash icon f0d0c8cdcd88c0e0 (10 x AsyncRAT, 5 x XWorm, 4 x Formbook)
Reporter skocherhan
Tags:exe QuasarRAT


Avatar
skocherhan
http://167.160.161.247/q8d90.exe

C2:
66.63.187.164:8596
167.160.161.247:8596

Intelligence

File Origin
# of uploads :
2
# of downloads :
32
Origin country :
GB GB
Vendor Threat Intelligence
Malware family:
quasar
Create hunting rule
ID:
1
File name:
_cb91a07bcde29ad710bcc98259ea71f15b4a0fe65082fa6481ab8ac8b8b641e0.exe
Verdict:
Malicious activity
Analysis date:
2025-07-27 11:38:53 UTC
Tags:
evasion auto-reg quasar
Link:
https://app.any.run/tasks/8d987847-0b18-47aa-b647-0873b9a465dd

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/17139/
Detection(s):
Win.Packed.Passwordstealera-7544289-0
Create hunting rule

Win.Packed.Passwordstealera-7544294-0
Create hunting rule

Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68860fa4af3050dc8d3185cf
Tags:
autorun quasar
Result
Verdict:
Malware
Maliciousness:

Behaviour
Using the Windows Management Instrumentation requests
Сreating synchronization primitives
DNS request
Connection attempt
Sending an HTTP GET request
Creating a file in the %AppData% subdirectories
Launching a process
Enabling the 'hidden' option for recently created files
Creating a process from a recently created file
Creating a file
Creating a window
Unauthorized injection to a recently created process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Connection attempt to an infection source
Enabling autorun by creating a file
Enabling threat expansion on mass storage devices
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
mpress net overlay packed quasarrat
Link:
https://www.filescan.io/uploads/68860fa513488cfd44da48a0/reports/0aa2a515-2b47-43aa-a31f-93dd3a96a3b5/overview
Verdict:
Malicious
Labled as:
Ransom.Imps.Generic
Link:
https://www.hybrid-analysis.com/sample/cb91a07bcde29ad710bcc98259ea71f15b4a0fe65082fa6481ab8ac8b8b641e0
Malware family:
Quasar RAT
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/9ce223c7-4c31-4ab9-9bbe-6c73ddc3d667
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/cb91a07bcde29ad710bcc98259ea71f15b4a0fe65082fa6481ab8ac8b8b641e0
Verdict:
inconclusive
YARA:
10 match(es)
Tags:
.Net Executable PE (Portable Executable) SOS: 0.29 Win 32 Exe x86
Link:
https://app.malva.re/file/60eb9c7500e862b147abe91eae94579c
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/cb91a07bcde29ad710bcc98259ea71f15b4a0fe65082fa6481ab8ac8b8b641e0/
Verdict:
Malicious
Threat:
Trojan.MSIL.Quasar
Link:
https://tip.neiki.dev/file/cb91a07bcde29ad710bcc98259ea71f15b4a0fe65082fa6481ab8ac8b8b641e0
Threat name:
ByteCode-MSIL.Backdoor.Quasar
Create hunting rule
Status:
Malicious
First seen:
2025-07-22 03:30:58 UTC
File Type:
PE (.Net Exe)
Extracted files:
19
AV detection:
30 of 35 (85.71%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=zoi2a66n4knnoef4zgbft2tr6fnuud7gkcbpuzebvofmrofwihqa._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:office04 execution persistence spyware trojan
Link:
https://tria.ge/reports/250727-nrtbdaxms6/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Drops autorun.inf file
Adds Run key to start application
Looks up external IP address via web service
Executes dropped EXE
Quasar RAT
Quasar family
Quasar payload
Malware Config
C2 Extraction:
66.63.187.164:8596
167.160.161.247:8596
Verdict:
Malicious
Tags:
Win.Packed.Passwordstealera-7544289-0 Qasar_Rat AZORult External_IP_Lookup VoidRat
YARA:
n/a
Link:
https://app.threat.zone/submission/f4638997-e2eb-4312-9dfd-d409c1a95121
Unpacked files
SH256 hash:
cb91a07bcde29ad710bcc98259ea71f15b4a0fe65082fa6481ab8ac8b8b641e0
MD5 hash:
60eb9c7500e862b147abe91eae94579c
SHA1 hash:
940c01dd0cd625b8b3fab93e57614cb36d464c7a
Link:
https://www.unpac.me/results/f6cb5d12-4f1a-407a-bc9f-57509540676b/
SH256 hash:
ed2cab53c796d4c2680980c72d5130a0277b2d4cf5630e1aa614ce2316435ab1
MD5 hash:
57f7b26159e020bee341b11a949705ad
SHA1 hash:
1dbf4e84ad80c2856a2fa9d7d9e0fbacf566468a
Detections:
win_blackshades_w0
Create hunting rule
QuasarRAT
Create hunting rule
cn_utf8_windows_terminal
Create hunting rule
malware_windows_xrat_quasarrat
Create hunting rule
Quasar_RAT_1
Create hunting rule
Quasar_RAT_2
Create hunting rule
MAL_QuasarRAT_May19_1
Create hunting rule
Vermin_Keylogger_Jan18_1
Create hunting rule
xRAT_1
Create hunting rule
CN_disclosed_20180208_KeyLogger_1
Create hunting rule
win_quasarrat_j1
Create hunting rule
Quasar
Create hunting rule
win_quasar_rat_client
Create hunting rule
INDICATOR_SUSPICIOUS_GENRansomware
Create hunting rule
INDICATOR_SUSPICIOUS_GENInfoStealer
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
Create hunting rule
MALWARE_Win_QuasarRAT
Create hunting rule
Link:
https://www.unpac.me/results/f6cb5d12-4f1a-407a-bc9f-57509540676b/
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/cb91a07bcde29ad710bcc98259ea71f15b4a0fe65082fa6481ab8ac8b8b641e0

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:mpress_2_xx_net
Create hunting rule
Author:Kevin Falcoz
Description:MPRESS v2.XX .NET
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_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)
Rule name:TeslaCryptPackedMalware
Create hunting rule

File information

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

Web download

QuasarRAT

Executable exe cb91a07bcde29ad710bcc98259ea71f15b4a0fe65082fa6481ab8ac8b8b641e0

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3590316/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/17139/

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
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high

Comments