MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3fb8ef0e57d3cbad82483cba016a1380698f2efca89d80d29d2cfab35b5c5cce. 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: 13


Intelligence 13 IOCs 1 YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 3fb8ef0e57d3cbad82483cba016a1380698f2efca89d80d29d2cfab35b5c5cce
SHA3-384 hash: d14db3afdd0fbbe22004d047ce9f0f35641c7e5180b276c40443123cff76364b4d39651c73ac91a59e4344037eb97921
SHA1 hash: 71b745e90a56697062984e2c3d96f83395a62d64
MD5 hash: b6c5e59a9f59dfd0b73d59671b691421
humanhash: mars-purple-georgia-july
File name:B6C5E59A9F59DFD0B73D59671B691421.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:514'048 bytes
First seen:2021-09-05 16:50:59 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:VTEgdfYKxUEiq2HjzTpBYEUqZNhOkQ5Ja4UcdR:2UwOIjzTp/UqZN9cCcdR
Threatray 134 similar samples on MalwareBazaar
TLSH T186B47C4023E8852BE2AF577AE8B11811ABF5E417B667EB8F4544A0EC3C66707CE41773
Reporter abuse_ch
Tags:exe QuasarRAT RAT


Avatar
abuse_ch
QuasarRAT C2:
195.133.95.3:2874

Indicators Of Compromise (IOCs)

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

IOCThreatFox Reference
195.133.95.3:2874 https://threatfox.abuse.ch/ioc/216196/

Intelligence

File Origin
# of uploads :
1
# of downloads :
232
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
B6C5E59A9F59DFD0B73D59671B691421.exe
Verdict:
Suspicious activity
Analysis date:
2021-09-05 16:51:58 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/c1bf00b1-840e-4076-b2ae-63149e3c51b7

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
QuasarStealer
Create hunting rule
Link:
https://www.capesandbox.com/analysis/185458/
Detection(s):
Win.Packed.Downeks-6898097-0
Create hunting rule

Win.Packed.Passwordstealera-9792228-0
Create hunting rule

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

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the Program Files subdirectories
Launching a process
Enabling the 'hidden' option for analyzed file
Creating a process from a recently created file
Creating a file
Enabling the 'hidden' option for recently created files
Connection attempt
Sending a custom TCP request
DNS request
Setting a keyboard event handler
Using the Windows Management Instrumentation requests
Sending a UDP request
Unauthorized injection to a recently created process
Enabling autorun by creating a file
Malware family:
Quasar RAT
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/240108d3-ee70-4add-87d8-e1b9695ef0d1
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/845580
Signature
.NET source code references suspicious native API functions
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)
May check the online IP address of the machine
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 478011 Sample: XpPzHkfCYD.exe Startdate: 05/09/2021 Architecture: WINDOWS Score: 100 46 Found malware configuration 2->46 48 Malicious sample detected (through community Yara rule) 2->48 50 Antivirus detection for dropped file 2->50 52 10 other signatures 2->52 8 XpPzHkfCYD.exe 2 2->8         started        12 XpPzHkfCYD.exe 5 2->12         started        process3 file4 36 C:\Program Files36etLimitVM\vm.exe, PE32 8->36 dropped 54 Hides that the sample has been downloaded from the Internet (zone.identifier) 8->54 14 vm.exe 14 2 8->14         started        18 schtasks.exe 1 8->18         started        38 C:\Users\user\AppData\...\XpPzHkfCYD.exe.log, ASCII 12->38 dropped 56 Uses schtasks.exe or at.exe to add and modify task schedules 12->56 20 vm.exe 2 12->20         started        22 schtasks.exe 1 12->22         started        signatures5 process6 dnsIp7 40 195.133.95.3, 2874, 49705 AGAVA3RU Russian Federation 14->40 42 tools.keycdn.com 185.172.148.96, 443, 49707 PROINITYPROINITYDE Germany 14->42 44 3 other IPs or domains 14->44 58 Hides that the sample has been downloaded from the Internet (zone.identifier) 14->58 60 Installs a global keyboard hook 14->60 24 schtasks.exe 1 14->24         started        26 conhost.exe 18->26         started        28 schtasks.exe 1 20->28         started        30 conhost.exe 22->30         started        signatures8 process9 process10 32 conhost.exe 24->32         started        34 conhost.exe 28->34         started       
Detection:
quasar
Create hunting rule
Link:
https://mwdb.cert.pl/sample/3fb8ef0e57d3cbad82483cba016a1380698f2efca89d80d29d2cfab35b5c5cce/
Threat name:
ByteCode-MSIL.Trojan.Quasar
Create hunting rule
Status:
Malicious
First seen:
2021-09-01 08:06:41 UTC
AV detection:
24 of 28 (85.71%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=h64o6dsx2pf23asihs5ac2qtqbuy6lx4vcoybuu5ft5lgw24ltha._file
Verdict:
malicious
Similar samples:
04d4ebdb690749b84d74422ccbb583acc3180cbe3eb280b9ece53ef5eb3b3abf
QuasarRAT
06b4062db19ac0017c3f0e32f27559a48aa9c7305f110c3b8485d5faa62d6814
QuasarRAT
1230b290a583361b44a14b0ebf16925f07d7d6ed0d58ecae0bdd2419903d27b0
QuasarRAT
2ba6b9466236aa43a839e4b4c9365dd730cb37ca2ddb009be0f2bcbced0e6d88
QuasarRAT
2c5d00f71931d80367ccae6bdd752ec56ab7647cc5312a0c7ddd24308ff9cc8e
QuasarRAT
3bdfd4cd7aacdefa4ab159a25b056056fd011b9ad60fc2166adbb41c5610b044
QuasarRAT
85e13a72f67635d8590b1952332a37371f5f06400cedd60cd8c85415a051c031
QuasarRAT
8be3c7231a1d547531c3e669d380fd00b5b3e773da201b34bed04810062329c0
QuasarRAT
a33be1069f51683e3ef5290bedad88f032df7b67fde8955bf2ad72b2f8d5e647
QuasarRAT
d99b51039634c4d1f0c7b74b71eddfd56a078b6e8ba3a6fa9a254b972df8706f
QuasarRAT
+ 124 additional samples on MalwareBazaar
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:officeab spyware trojan
Link:
https://tria.ge/reports/210905-vctf6ahga5/
Behaviour
Creates scheduled task(s)
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Drops file in Program Files directory
Looks up external IP address via web service
Executes dropped EXE
Quasar Payload
Quasar RAT
Malware Config
C2 Extraction:
195.133.95.3:2874
Unpacked files
SH256 hash:
3fb8ef0e57d3cbad82483cba016a1380698f2efca89d80d29d2cfab35b5c5cce
MD5 hash:
b6c5e59a9f59dfd0b73d59671b691421
SHA1 hash:
71b745e90a56697062984e2c3d96f83395a62d64
Link:
https://www.unpac.me/results/ee588da2-e9e9-40cb-b4aa-9144c0add389/
Malware family:
QuasarRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/3fb8ef0e57d3/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/3fb8ef0e57d3cbad82483cba016a1380698f2efca89d80d29d2cfab35b5c5cce

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_GENInfoStealer
Create hunting rule
Author:ditekSHen
Description:Detects executables containing common artifcats 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
Description:Detects QuasarRAT malware
Reference:https://blog.ensilo.com/uncovering-new-activity-by-apt10
Rule name:pe_imphash
Create hunting rule
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

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/185458/

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