MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf. 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 12 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf
SHA3-384 hash: 940ecd2fe32fdcb9636e27fba06d896190e109fe97ef2c0d47b8eabbb4adce4ba7b3ae08a910c9c6dff4610c6b2f282e
SHA1 hash: 98da7637a98df832078ed0ec08d11d588223783e
MD5 hash: a760c4263a2d1e144c2fd116bf1351e1
humanhash: west-edward-purple-delaware
File name:37FA30C9DCF255BDA62C0A6B7F88A48263A3DA18D18D8.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:515'072 bytes
First seen:2024-06-10 13:20:09 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'608 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:+TEgdfY97axTU7H4TywQCngRnLN9cHcdA:bUwkyoywQCnkgcdA
Threatray 358 similar samples on MalwareBazaar
TLSH T1CAB45B8123FC851BE1AE57BDE8B14421ABF4F407A667EB4F4940A1F92C567429E807F3
TrID 37.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
29.5% (.CPL) Windows Control Panel Item (generic) (57583/11/19)
8.4% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5)
6.7% (.SCR) Windows screen saver (13097/50/3)
5.3% (.EXE) Win64 Executable (generic) (10523/12/4)
Reporter abuse_ch
Tags:exe QuasarRAT RAT


Avatar
abuse_ch
QuasarRAT C2:
222.253.182.185:9090

Intelligence

File Origin
# of uploads :
1
# of downloads :
385
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
quasar
Create hunting rule
ID:
1
File name:
37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf.exe
Verdict:
Malicious activity
Analysis date:
2024-06-10 13:20:58 UTC
Tags:
rat quasar remote asyncrat evasion
Link:
https://app.any.run/tasks/a96ac72e-f76e-4188-8ba1-ff9e327d7f87

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
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=6667083ea439c6d6b0875057win7simulatehigh_evasion
Tags:
Encryption Execution Generic Network Stealth Msil Quasarstealer
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
Threat level:
  10/10
Confidence:
90%
Tags:
anti-vm crypto explorer hook infostealer keylogger lolbin quasar quasarrat rat remote schtasks shell32 stealer stealer
Link:
https://www.filescan.io/uploads/6666fdc0ef9fdf64aa699ed1/reports/3b74f84d-36a7-4dd9-b847-5152d17bbad9/overview
Verdict:
Malicious
Labled as:
MSIL.PasswordStealerA.Generic
Link:
https://www.hybrid-analysis.com/sample/37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/88b86749-4aa6-41d2-94cb-a005c222fa50
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1454593
Signature
.NET source code contains potential unpacker
AI detected suspicious sample
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Installs a global keyboard hook
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Snort IDS alert for network traffic
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Generic Downloader
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1454593 Sample: 37FA30C9DCF255BDA62C0A6B7F8... Startdate: 10/06/2024 Architecture: WINDOWS Score: 100 35 tools.keycdn.com 2->35 37 api.ipify.org 2->37 49 Snort IDS alert for network traffic 2->49 51 Found malware configuration 2->51 53 Malicious sample detected (through community Yara rule) 2->53 55 11 other signatures 2->55 9 37FA30C9DCF255BDA62C0A6B7F88A48263A3DA18D18D8.exe 5 2->9         started        13 Realtek HD Audio Universal Services.exe 2 2->13         started        signatures3 process4 file5 31 Realtek HD Audio Universal Services.exe, PE32 9->31 dropped 33 37FA30C9DCF255BDA6...A3DA18D18D8.exe.log, CSV 9->33 dropped 57 Uses schtasks.exe or at.exe to add and modify task schedules 9->57 59 Hides that the sample has been downloaded from the Internet (zone.identifier) 9->59 15 Realtek HD Audio Universal Services.exe 14 2 9->15         started        19 schtasks.exe 1 9->19         started        61 Installs a global keyboard hook 13->61 21 schtasks.exe 1 13->21         started        signatures6 process7 dnsIp8 39 222.253.182.185, 49712, 49714, 9090 VNPT-AS-VNVNPTCorpVN Viet Nam 15->39 41 tools.keycdn.com 185.172.148.96, 443, 49715, 49716 PROINITYPROINITYDE Germany 15->41 43 api.ipify.org 104.26.12.205, 443, 49717, 49718 CLOUDFLARENETUS United States 15->43 45 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->45 47 Installs a global keyboard hook 15->47 23 schtasks.exe 1 15->23         started        25 conhost.exe 19->25         started        27 conhost.exe 21->27         started        signatures9 process10 process11 29 conhost.exe 23->29         started       
Score:
95%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf
Detection:
quasar
Create hunting rule
Link:
https://mwdb.cert.pl/sample/37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf/
Threat name:
ByteCode-MSIL.Trojan.Quasar
Create hunting rule
Status:
Malicious
First seen:
2024-06-07 22:36:00 UTC
File Type:
PE (.Net Exe)
Extracted files:
2
AV detection:
33 of 38 (86.84%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=g75dbso46jk33jrmbjvx7cfeqjr2hwqy2ggyyzvrzo6iaedxz7pq._file
Verdict:
malicious
Similar samples:
1416bd55b04a4d8299c3e976e4e6a160850471e330d25f332f70d8ca618de894
QuasarRAT
3659778cc75ed1428fe16a288b28095311ffdc650a1202482376b4f3c04b75f3
QuasarRAT
37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf
QuasarRAT
66aa3076bab656dc495c3a7cd2f8cfef86ffe2082d209fabe8c64905b8c76cb9
QuasarRAT
a24dafb52de61a6bb3d363afb0d02ac3311d4a4f221b20f246c2fa2d5cb352fd
QuasarRAT
f49f187849de1ec6c2ac50585cc3ce47ff4b220e413cdedb63b762efd4504bcd
QuasarRAT
+ 348 additional samples on MalwareBazaar
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:beobeo spyware trojan
Link:
https://tria.ge/reports/240610-qlm9aaxeqk/
Behaviour
Creates scheduled task(s)
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Executes dropped EXE
Quasar RAT
Quasar payload
Malware Config
C2 Extraction:
222.253.182.185:9090
Unpacked files
SH256 hash:
37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf
MD5 hash:
a760c4263a2d1e144c2fd116bf1351e1
SHA1 hash:
98da7637a98df832078ed0ec08d11d588223783e
Detections:
QuasarRAT
Create hunting rule
malware_windows_xrat_quasarrat
Create hunting rule
win_quasarrat_j2
Create hunting rule
MALWARE_Win_QuasarStealer
Create hunting rule
cn_utf8_windows_terminal
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
Create hunting rule
MAL_QuasarRAT_May19_1
Create hunting rule
INDICATOR_SUSPICIOUS_GENInfoStealer
Create hunting rule
Link:
https://www.unpac.me/results/a0c94473-2f04-4992-a5d1-086e9a4d10b2/
Malware family:
QuasarRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/37fa30c9dcf2/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/37fa30c9dcf255bda62c0a6b7f88a48263a3da18d18d8c66b1cbbc801077cfdf

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: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: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:pe_imphash
Create hunting rule
Rule name:quasarrat
Create hunting rule
Author:jeFF0Falltrades
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
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.

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