MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1f8dd197b62c9f620d9edf72be1e4154a5fc9c847eee5e68a2382f0a9613fb79. 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: 10


Intelligence 10 IOCs YARA 13 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 1f8dd197b62c9f620d9edf72be1e4154a5fc9c847eee5e68a2382f0a9613fb79
SHA3-384 hash: 4e3975c77f2f1f0ca4d0fcd255e318a3a298d03c854f2dc335dbadfff5f5c9ee2a5dde52b6fcdc014d8db93100541373
SHA1 hash: 9567c1b308c694226d56d734326d741ae18859cb
MD5 hash: 3b6e27d8d7051194ba8dd6fd3a299f95
humanhash: princess-minnesota-uniform-red
File name:3b6e27d8d7051194ba8dd6fd3a299f95.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:1'681'920 bytes
First seen:2021-01-21 18:12:23 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 24576:awd2kNgX/dt6tLZID/elfTfhlPfnFTMspg1LOoRo8UqCurRIlg3:jdeXVkti/eljPfF3OOYouCuh
Threatray 170 similar samples on MalwareBazaar
TLSH CF75C69A711C72DEC8D7C4729A6B1C64AA536C6B431B4113A0977DBDBA3C887CF143E2
Reporter abuse_ch
Tags:exe nVpn QuasarRAT RAT


Avatar
abuse_ch
QuasarRAT C2:
whmfix009.cf:5409 (91.193.75.204)

Pointing to nVpn:

% Information related to '91.193.75.0 - 91.193.75.255'

% Abuse contact for '91.193.75.0 - 91.193.75.255' is 'abuse@privacyfirst.sh'

inetnum: 91.193.75.0 - 91.193.75.255
descr: Moscow, Russia
remarks: This prefix is assigned to The PRIVACYFIRST Project, which
remarks: operates infrastructure jointly used by various VPN service
remarks: providers. We have a very strong focus on privacy and freedom.
remarks: In case of abuse, we encourage all international law enforcement
remarks: agencies to get in touch with our abuse contact. Due to the fact
remarks: that we keep no logs of user activities and only share data when
remarks: it is legally required under our jurisdiction, it is very unlikely
remarks: for a demand of user information to be successful. Still, that
remarks: should not deter you from reaching out.
netname: PRIVACYFIRST-RU2
country: RU
admin-c: TPP15-RIPE
tech-c: TPP15-RIPE
abuse-c: ACRO34258-RIPE
mnt-by: PRIVACYFIRST-MNT
mnt-by: RIPE-NCC-END-MNT
org: ORG-KHd1-RIPE
status: ASSIGNED PI
created: 2012-06-04T11:05:55Z
last-modified: 2021-01-03T20:17:23Z
source: RIPE
sponsoring-org: ORG-MW1-RIPE

Intelligence

File Origin
# of uploads :
1
# of downloads :
178
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
3f898310571f4ca9288a2bf7053e5f644c7cd2b8.doc
Verdict:
Malicious activity
Analysis date:
2021-01-20 09:56:08 UTC
Tags:
macros macros-on-open generated-doc loader evasion trojan rat quasar
Link:
https://app.any.run/tasks/d5a7a8f5-b2b3-4550-b43e-5d624c06233d

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/113359/
Detection(s):
SecuriteInfo.com.BackDoor.Quasar.134.28389.598.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Creating a file in the %AppData% directory
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Deleting a recently created file
Unauthorized injection to a recently created process
Creating a file
Using the Windows Management Instrumentation requests
DNS request
Sending an HTTP GET request
Enabling autorun by creating a file
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.
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/587618
Signature
.NET source code references suspicious native API functions
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Detected unpacking (changes PE section rights)
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
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
PE file contains section with special chars
PE file has nameless sections
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Sigma detected: Scheduled temp file as task from temp location
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM_3
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 342835 Sample: 9A87wdxsuh.exe Startdate: 21/01/2021 Architecture: WINDOWS Score: 100 70 Malicious sample detected (through community Yara rule) 2->70 72 Multi AV Scanner detection for dropped file 2->72 74 Sigma detected: Scheduled temp file as task from temp location 2->74 76 11 other signatures 2->76 10 9A87wdxsuh.exe 6 2->10         started        14 9A87wdxsuh.exe 4 2->14         started        process3 file4 56 C:\Users\user\AppData\...behaviorgraphGiHYziFcxmvQA.exe, PE32 10->56 dropped 58 C:\Users\user\AppData\Local\...\tmp4568.tmp, XML 10->58 dropped 60 C:\Users\user\AppData\...\9A87wdxsuh.exe.log, ASCII 10->60 dropped 84 Detected unpacking (changes PE section rights) 10->84 86 Injects a PE file into a foreign processes 10->86 88 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 10->88 16 9A87wdxsuh.exe 15 4 10->16         started        21 schtasks.exe 1 10->21         started        23 9A87wdxsuh.exe 10->23         started        25 schtasks.exe 14->25         started        27 9A87wdxsuh.exe 14->27         started        29 9A87wdxsuh.exe 14->29         started        signatures5 process6 dnsIp7 62 ip-api.com 208.95.112.1, 49732, 49737, 80 TUT-ASUS United States 16->62 54 C:\Users\user\AppData\Roaming\...\casxvat.exe, PE32 16->54 dropped 78 Hides that the sample has been downloaded from the Internet (zone.identifier) 16->78 31 casxvat.exe 5 16->31         started        34 schtasks.exe 1 16->34         started        36 conhost.exe 21->36         started        38 conhost.exe 25->38         started        file8 signatures9 process10 signatures11 90 Multi AV Scanner detection for dropped file 31->90 92 Detected unpacking (changes PE section rights) 31->92 94 Machine Learning detection for dropped file 31->94 96 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 31->96 40 casxvat.exe 31->40         started        44 schtasks.exe 31->44         started        46 conhost.exe 34->46         started        process12 dnsIp13 64 whmfix009.cf 91.193.75.204, 49738, 5409 DAVID_CRAIGGG Serbia 40->64 66 192.168.2.1 unknown unknown 40->66 68 ip-api.com 40->68 80 Hides that the sample has been downloaded from the Internet (zone.identifier) 40->80 82 Installs a global keyboard hook 40->82 48 schtasks.exe 40->48         started        50 conhost.exe 44->50         started        signatures14 process15 process16 52 conhost.exe 48->52         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/1f8dd197b62c9f620d9edf72be1e4154a5fc9c847eee5e68a2382f0a9613fb79/
Threat name:
ByteCode-MSIL.Trojan.Ymacco
Create hunting rule
Status:
Malicious
First seen:
2021-01-20 11:58:17 UTC
File Type:
PE (.Net Exe)
Extracted files:
12
AV detection:
24 of 28 (85.71%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=d6g5df5wfspwedm635zl4hsbkss7zheep3xf42fchaxqvfqt7n4q._file
Verdict:
malicious
Similar samples:
4a4378de27cd95ef7ab712064303f817e01f4630bce5f290ce3af15d55a43321
QuasarRAT
5c711e224f09cfe6b651f58e3a075c54e7ad2d3a677cc71835bc37d8f21ad4b2
QuasarRAT
62fe31ebb2f722971f99d640a9ae310245ac1c4547a229917ddc916b79a8b154
QuasarRAT
749cf44e03a021f01f3604fd54781103ab897a69db71229f9319888be7a8bcd2
QuasarRAT
8d446a98b783427a524db452e5adb33b8f5e025f3c7720f022667f856762b2e4
QuasarRAT
921e1f36b6d09d92497e9cbb88491d84d9f067f278e9ad442110b76dc9636196
QuasarRAT
a0f43d8dbeafd898f5711b63275b81c5169e640f90a87977c2ab391418d68f63
QuasarRAT
b23274e47a003476681da8925f2c15ff1c7ef988cabf76dbf1e5799a914a3ab1
QuasarRAT
dda13171f5b2a61dee9faee7daa78376c41e17dc27f8343575acd4aa0c6b0f16
QuasarRAT
f0e8b7f7e23ca59f8913b7507c420abe3f81bbfd48a0b78531ff28ecb78a916f
QuasarRAT
+ 160 additional samples on MalwareBazaar
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar ransomware spyware trojan
Link:
https://tria.ge/reports/210121-tkjnr8eqy2/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Looks up external IP address via web service
Loads dropped DLL
Executes dropped EXE
Quasar RAT
Unpacked files
SH256 hash:
3f02dfd0b0cd9600617166c46a3eb09b07837b6e718a02677ea03cf2e909e1a4
MD5 hash:
2057e405d27ad310375457e7a9354b42
SHA1 hash:
34463f0ded3acac785af00ae9d61227cb4d0be5c
Link:
https://www.unpac.me/results/d0ce4511-4583-44e0-833b-27d626579e6e/
SH256 hash:
07eeb96b67dfd1b9badf6477859919be6508e86311f7de2b4d6d9d5f3c1a26f9
MD5 hash:
2d2234a1a2bea0737aba2a671c131631
SHA1 hash:
55e5bfca55f2fb1ce9751a247dbeb97b9616929c
Link:
https://www.unpac.me/results/d0ce4511-4583-44e0-833b-27d626579e6e/
SH256 hash:
56264318358d3b6491cf59f3efca3d68899f146e7c3d11b5e072b70615223c26
MD5 hash:
47d5f19c2264960d3dfb9ab7597c986a
SHA1 hash:
64f9dc02817d178db152cfc2576a4cdc902e2038
Link:
https://www.unpac.me/results/d0ce4511-4583-44e0-833b-27d626579e6e/
SH256 hash:
1f8dd197b62c9f620d9edf72be1e4154a5fc9c847eee5e68a2382f0a9613fb79
MD5 hash:
3b6e27d8d7051194ba8dd6fd3a299f95
SHA1 hash:
9567c1b308c694226d56d734326d741ae18859cb
Link:
https://www.unpac.me/results/d0ce4511-4583-44e0-833b-27d626579e6e/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Quasar
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/1f8dd197b62c9f620d9edf72be1e4154a5fc9c847eee5e68a2382f0a9613fb79

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:Chrome_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Chrome in files like avemaria
Rule name:CN_disclosed_20180208_KeyLogger_1
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:INDICATOR_SUSPICIOUS_GENInfoStealer
Create hunting rule
Author:ditekSHen
Description:Detects executables containing common artifcats observed in infostealers
Rule name:Keylog_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Contains Keylog
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
Description:Detects QuasarRAT malware
Reference:https://blog.ensilo.com/uncovering-new-activity-by-apt10
Rule name:MSILStealer
Create hunting rule
Author:https://github.com/hwvs
Description:Detects strings from C#/VB Stealers and QuasarRat
Reference:https://github.com/quasar/QuasarRAT
Rule name:Quasar
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect QuasarRAT in memory
Rule name:Quasar_RAT_1
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
Description:Detects Quasar RAT
Reference:https://www.pwc.co.uk/cyber-security/pdf/cloud-hopper-annex-b-final.pdf
Rule name:Select_from_enumeration
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:Vermin_Keylogger_Jan18_1
Create hunting rule
Author:Florian Roth
Description:Detects Vermin Keylogger
Reference:https://researchcenter.paloaltonetworks.com/2018/01/unit42-vermin-quasar-rat-custom-malware-used-ukraine/
Rule name:xRAT_1
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.

Web download

QuasarRAT

Executable exe 1f8dd197b62c9f620d9edf72be1e4154a5fc9c847eee5e68a2382f0a9613fb79

(this sample)

Cape
Cape
https://www.capesandbox.com/analysis/113359/
  
URLhaus
https://urlhaus.abuse.ch/url/973021/
  
Delivery method
Distributed via web download

Comments