MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 471a91b4f8d67792bf0b5a67460fb7fe335db4963a7154c0cc20fe7461a87514. 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: 6


Intelligence 6 IOCs YARA 9 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 471a91b4f8d67792bf0b5a67460fb7fe335db4963a7154c0cc20fe7461a87514
SHA3-384 hash: e60f74271fbcad5e6b54497a14fcaa32ea023a0e4c2eb58d1865d75259771585d190bc68ba80fc6cb0a36059fea25ff9
SHA1 hash: 5b44fa526255e16b812511675e08e4c32393eacb
MD5 hash: a6632c024290226c386f8a535d87b7f4
humanhash: princess-michigan-moon-solar
File name:PO91666. pdf.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:1'010'688 bytes
First seen:2020-11-20 07:43:23 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 6144:4VS5fpGM+LE97qw0W595hvruSFhwLcmLqNdiAncraQ8bC0Mj9RtcOpCaVj:4Sf+E9LruSFhMvLcnfCrjRcT4
Threatray 136 similar samples on MalwareBazaar
TLSH 8725D164E0866C1D543C80B4E7014B645FF3247AAE8BEB942EC0AFF6B4B69C76749CD4
Reporter abuse_ch
Tags:exe QuasarRAT RAT


Avatar
abuse_ch
Malspam distributing QuasarRAT:

HELO: smtp204.alice.it
Sending IP: 82.57.200.100
From: Romeo Giovanni<vcalzolari64@tim.it>
Reply-To: <sales@prodigy.com.mx>
Subject: Re: PO91666
Attachment: PO91666. pdf.rar (contains "PO91666. pdf.exe")

QuasarRAT C2:
zxupvn.hopto.org:1212 (23.105.131.179)

Intelligence

File Origin
# of uploads :
1
# of downloads :
109
Origin country :
n/a
Vendor Threat Intelligence
Result
Verdict:
Malware
Maliciousness:

Behaviour
Launching a process
Creating a process with a hidden window
Sending a UDP request
DNS request
Unauthorized injection to a recently created process
Adding an access-denied ACE
Creating a file
Using the Windows Management Instrumentation requests
Sending an HTTP GET request
Creating a window
Sending a custom TCP request
Sending a TCP request to an infection source
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Enabling autorun by creating a file
Enabling autorun
Result
Gathering data
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.adwa.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/543794
Signature
.NET source code contains very large strings
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Binary contains a suspicious time stamp
Connects to a pastebin service (likely for C&C)
Contains functionality to hide user accounts
Creates an undocumented autostart registry key
Creates autostart registry keys with suspicious names
Creates multiple autostart registry keys
Drops PE files to the startup folder
Hides that the sample has been downloaded from the Internet (zone.identifier)
Hides threads from debuggers
Injects a PE file into a foreign processes
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)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses an obfuscated file name to hide its real file extension (double extension)
Yara detected AntiVM_3
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 320995 Sample: PO91666. pdf.exe Startdate: 20/11/2020 Architecture: WINDOWS Score: 100 54 hastebin.com 2->54 56 g.msn.com 2->56 68 Malicious sample detected (through community Yara rule) 2->68 70 Antivirus detection for dropped file 2->70 72 Antivirus / Scanner detection for submitted sample 2->72 74 15 other signatures 2->74 8 PO91666. pdf.exe 18 4 2->8         started        13 PO91666. pdf.exe 2 2->13         started        15 PO91666. pdf.exe 2->15         started        17 3 other processes 2->17 signatures3 process4 dnsIp5 62 hastebin.com 172.67.143.180, 443, 49727, 49755 CLOUDFLARENETUS United States 8->62 50 C:\Users\user\AppData\...\PO91666. pdf.exe, PE32 8->50 dropped 52 C:\Users\...\PO91666. pdf.exe:Zone.Identifier, ASCII 8->52 dropped 78 Creates an undocumented autostart registry key 8->78 80 Creates autostart registry keys with suspicious names 8->80 82 Creates multiple autostart registry keys 8->82 19 PO91666. pdf.exe 2 8->19         started        23 WerFault.exe 23 9 8->23         started        26 timeout.exe 1 8->26         started        84 Hides threads from debuggers 13->84 86 Injects a PE file into a foreign processes 13->86 28 timeout.exe 13->28         started        64 192.168.2.1 unknown unknown 15->64 30 timeout.exe 15->30         started        66 hastebin.com 17->66 32 timeout.exe 17->32         started        34 timeout.exe 17->34         started        36 timeout.exe 17->36         started        file6 88 Connects to a pastebin service (likely for C&C) 66->88 signatures7 process8 dnsIp9 58 ip-api.com 208.95.112.1, 49730, 80 TUT-ASUS United States 19->58 60 zxupvn.hopto.org 23.105.131.179, 1212, 49731 LEASEWEB-USA-NYC-11US United States 19->60 76 Hides that the sample has been downloaded from the Internet (zone.identifier) 19->76 48 C:\ProgramData\Microsoft\...\Report.wer, Little-endian 23->48 dropped 38 conhost.exe 26->38         started        40 conhost.exe 28->40         started        42 conhost.exe 30->42         started        44 conhost.exe 32->44         started        46 conhost.exe 34->46         started        file10 signatures11 process12
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/471a91b4f8d67792bf0b5a67460fb7fe335db4963a7154c0cc20fe7461a87514/
Threat name:
ByteCode-MSIL.Spyware.Negasteal
Create hunting rule
Status:
Malicious
First seen:
2020-11-20 00:00:34 UTC
AV detection:
23 of 28 (82.14%)
Threat level:
  2/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=i4njdnhy2z3zfpylljtumd5x7yzv3newhjyvjqgmed7hiyniouka._file
Verdict:
malicious
Similar samples:
5e74c2b7ac2d1ad593abac2e47d690a083bf96f1566901e58a5f59d221bc9853
QuasarRAT
703aadea111eae71a7dfb3f2c63c4522b4edd138033fef221295f74d3509e10a
QuasarRAT
7482b140488cd74ef0403293fac39ef04971a50072ab191dd84ec9471b2f0b25
QuasarRAT
774fa620be98d94c8530d9c5e50e48c7595271fb911753b1c16d33dad1bc141d
QuasarRAT
7ed14885068667e9de2ede24522ab5e7bc2b02ed2f5953d590517921a3d77f4f
QuasarRAT
94b4df2a78e60f80472d518819e7383b09f20d18b270d60b99be31a4a12f7156
QuasarRAT
9e33fbfc975a81d62c7ec060a00a42fcdf5e84ba294be3f21d5307b79ddf9555
QuasarRAT
b46a76c6240983b927fa789dbfd5214bb513285da9205c52539736286346ddaf
QuasarRAT
d33b633b962e2851492365a557b624d4682620516513cde765b5e0428c69d917
QuasarRAT
e83d13fcdc0f133482d558c8ce25b45a491ba3aff13849ce8169f05bb4972f0d
QuasarRAT
+ 126 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  10/10
Tags:
persistence
Link:
https://tria.ge/reports/201120-d75lgql9lx/
Behaviour
Delays execution with timeout.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Program crash
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Looks up external IP address via web service
Drops startup file
Modifies WinLogon for persistence
Unpacked files
SH256 hash:
471a91b4f8d67792bf0b5a67460fb7fe335db4963a7154c0cc20fe7461a87514
MD5 hash:
a6632c024290226c386f8a535d87b7f4
SHA1 hash:
5b44fa526255e16b812511675e08e4c32393eacb
Link:
https://www.unpac.me/results/90e87be1-3038-4fcd-a9e7-9d8fdecec5ca/
Please note that we are no longer able to provide a coverage score for Virus Total.

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:Choice_Del_method_bin_mem
Create hunting rule
Author:James_inthe_box
Description:cmd ping IP nul del
Rule name:Email_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Email in files like avemaria
Rule name:IPPort_combo_mem
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
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:Quasar
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect QuasarRAT in memory
Rule name:RDPWrap
Create hunting rule
Author:@bartblaze
Description:Identifies RDP Wrapper, sometimes used by attackers to maintain persistence.
Reference:https://github.com/stascorp/rdpwrap
Rule name:Reverse_text_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Reverse text detected
Rule name:Select_from_enumeration
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:Stealer_word_in_memory
Create hunting rule
Author:James_inthe_box
Description:The actual word stealer in memory

File information

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

Malspam

QuasarRAT

rar 1ae928c8a8883074e5f80a0cbc4dda70084b616b451c744223e6ab9aee10ec3f

QuasarRAT

Executable exe 471a91b4f8d67792bf0b5a67460fb7fe335db4963a7154c0cc20fe7461a87514

(this sample)

  
Dropped by
MD5 dec4dc0180437cb4e62615be75089570
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 1ae928c8a8883074e5f80a0cbc4dda70084b616b451c744223e6ab9aee10ec3f

Comments