MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a28b2f50eb31526831a83bbc71407ca6f6400862a11b9d43c7246902a0cc6681. 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


njrat


Vendor detections: 9


Intelligence 9 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a28b2f50eb31526831a83bbc71407ca6f6400862a11b9d43c7246902a0cc6681
SHA3-384 hash: 90a5855786f1ad482cc6482f357e50377b5dbfebb907352cf3a533d5e3b68e071e97d5b1364a7ca61bf54435b6b3a0a5
SHA1 hash: 169480f75e28f1ee573d8f669b4edc269b164c21
MD5 hash: 363227ef39ce47be559999d91e19aff9
humanhash: queen-william-red-alaska
File name:363227ef39ce47be559999d91e19aff9.exe
Download: download sample
Signature njrat
Create hunting rule
File size:42'112 bytes
First seen:2021-03-10 12:28:47 UTC
Last seen:2021-03-10 13:45:46 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 768:j09OBDGpoOBAz/pvtl01GGhTrq+nhBhMyAouapPXo9MrMHVGhoZ:jbIoOBADpvM0gTWKuyAouapPXoaWf
Threatray 615 similar samples on MalwareBazaar
TLSH 4113F8103F955217E49EFF36E1D23944777DA7D22F039A2A1B0C41ABEC22986592C63F
Reporter abuse_ch
Tags:exe NjRAT RAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
191
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
363227ef39ce47be559999d91e19aff9.exe
Verdict:
Malicious activity
Analysis date:
2021-03-10 12:32:56 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/4d2d0eb6-a9cd-4a2f-930c-c428abeb193a

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/123619/
Detection(s):
SecuriteInfo.com.Trojan.Heur.KT.2.cm1@aq2ccfi.14506.15608.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
DNS request
Sending an HTTP GET request
Creating a file
Moving a recently created file
Using the Windows Management Instrumentation requests
Sending a UDP request
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:
Njrat
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/634362
Signature
Adds a directory exclusion to Windows Defender
Binary contains a suspicious time stamp
Changes security center settings (notifications, updates, antivirus, firewall)
Creates an autostart registry key pointing to binary in C:\Windows
Drops executables to the windows directory (C:\Windows) and starts them
Drops PE files with benign system names
Hides threads from debuggers
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sigma detected: Suspicious Svchost Process
Sigma detected: System File Execution Location Anomaly
System process connects to network (likely due to code injection or exploit)
Tries to delay execution (extensive OutputDebugStringW loop)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Yara detected Njrat
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 366150 Sample: 5uPX9R28pn.exe Startdate: 10/03/2021 Architecture: WINDOWS Score: 100 75 Multi AV Scanner detection for domain / URL 2->75 77 Malicious sample detected (through community Yara rule) 2->77 79 Multi AV Scanner detection for dropped file 2->79 81 9 other signatures 2->81 7 5uPX9R28pn.exe 17 11 2->7         started        12 explorer.exe 2->12         started        14 explorer.exe 2->14         started        16 12 other processes 2->16 process3 dnsIp4 63 liverpoolofcfanclub.com 104.21.31.39, 49704, 80 CLOUDFLARENETUS United States 7->63 55 C:\Windows\Microsoft.NET\...\svchost.exe, PE32 7->55 dropped 57 C:\Windows\...\svchost.exe:Zone.Identifier, ASCII 7->57 dropped 59 C:\Users\user\AppData\...\rw5co2gc.newcfg, XML 7->59 dropped 87 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 7->87 89 Creates an autostart registry key pointing to binary in C:\Windows 7->89 91 Adds a directory exclusion to Windows Defender 7->91 97 2 other signatures 7->97 18 5uPX9R28pn.exe 1 3 7->18         started        21 WerFault.exe 7->21         started        23 cmd.exe 1 7->23         started        25 powershell.exe 24 7->25         started        27 svchost.exe 12->27         started        93 Drops executables to the windows directory (C:\Windows) and starts them 14->93 31 svchost.exe 14->31         started        65 127.0.0.1 unknown unknown 16->65 67 192.168.2.1 unknown unknown 16->67 95 Changes security center settings (notifications, updates, antivirus, firewall) 16->95 33 MpCmdRun.exe 16->33         started        35 WerFault.exe 16->35         started        file5 signatures6 process7 dnsIp8 49 C:\Users\user\AppData\...\Windows Update.exe, PE32 18->49 dropped 51 C:\Users\user\AppData\...\5uPX9R28pn.exe.log, ASCII 18->51 dropped 37 Windows Update.exe 18->37         started        53 C:\ProgramData\Microsoft\...\Report.wer, Little-endian 21->53 dropped 41 conhost.exe 23->41         started        43 timeout.exe 1 23->43         started        45 conhost.exe 25->45         started        69 172.67.174.240, 49709, 49710, 49711 CLOUDFLARENETUS United States 27->69 71 liverpoolofcfanclub.com 27->71 99 Multi AV Scanner detection for dropped file 27->99 101 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 27->101 103 Tries to delay execution (extensive OutputDebugStringW loop) 27->103 107 2 other signatures 27->107 73 liverpoolofcfanclub.com 31->73 105 System process connects to network (likely due to code injection or exploit) 31->105 47 conhost.exe 33->47         started        file9 signatures10 process11 dnsIp12 61 liverpoolofcfanclub.com 37->61 83 Hides threads from debuggers 37->83 85 Injects a PE file into a foreign processes 37->85 signatures13
Gathering data
Threat name:
ByteCode-MSIL.Worm.Blacktearbot
Create hunting rule
Status:
Malicious
First seen:
2021-03-10 08:18:27 UTC
AV detection:
14 of 28 (50.00%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=ukfs6uhlgfjgqmniho6hcqd4u33eacdcuenz2q6heruqfigmm2aq._file
Verdict:
malicious
Similar samples:
137d03d974474c2998492be7b2d57fd1c7091e987bef4f1cd39ce7cf5a019fbe
njrat
2f5cd6b013a52c1946739554d64f35f0af679025755c2191811045833d3ce7a4
njrat
4824693d37ee0c444b89e21a2ae1cba396927f299e88751759635b2795c1bc96
njrat
4d742fd1047a6a9d019de5deceaae8896d5cee545392b37afab84d29efdcb470
njrat
585b9a5e3aac2aa59c5741bc7f56029aeea7c00dd870dc6064f856c84bc70262
njrat
975d36217950a31fa9591d0ad5236f8817f4f51c5d23f01e88c5684dd197cb15
njrat
a0a3915436586816ac0de5463d4c20c6bcb289326ef04999a1ef2c5f1723c86f
njrat
c2fad2f1da50fadaeb21235a2f1ab6ca135174b10c0f7e499bf9f7bb1d03daf2
njrat
f4ae0a96fe157d059c62d52e5934283f6055e822451db81a0bb9f646e98dc310
njrat
f586880e7c2d2991e4cc097fd515c0578af818ba1f57ece0dba2c8626161d22d
njrat
+ 605 additional samples on MalwareBazaar
Result
Malware family:
njrat
Create hunting rule
Score:
  10/10
Tags:
family:njrat evasion persistence trojan
Link:
https://tria.ge/reports/210310-1lycp5mdkx/
Behaviour
Delays execution with timeout.exe
Modifies system certificate store
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Drops file in Windows directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Adds Run key to start application
Maps connected drives based on registry
Checks BIOS information in registry
Drops startup file
Loads dropped DLL
Windows security modification
Executes dropped EXE
Looks for VMWare Tools registry key
Modifies Windows Firewall
Looks for VirtualBox Guest Additions in registry
Windows security bypass
njRAT/Bladabindi
Unpacked files
SH256 hash:
a28b2f50eb31526831a83bbc71407ca6f6400862a11b9d43c7246902a0cc6681
MD5 hash:
363227ef39ce47be559999d91e19aff9
SHA1 hash:
169480f75e28f1ee573d8f669b4edc269b164c21
Link:
https://www.unpac.me/results/5316106f-9822-4a5f-8d84-4f2d6557a0f7/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Backdoor
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/a28b2f50eb31526831a83bbc71407ca6f6400862a11b9d43c7246902a0cc6681

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:CN_disclosed_20180208_c
Create hunting rule
Author:Florian Roth
Description:Detects malware from disclosed CN malware set
Reference:https://twitter.com/cyberintproject/status/961714165550342146
Rule name:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFu
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
Rule name:Njrat
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect njRAT in memory
Rule name:Ping_Del_method_bin_mem
Create hunting rule
Author:James_inthe_box
Description:cmd ping IP nul del
Rule name:win_njrat_w1
Create hunting rule
Author:Brian Wallace @botnet_hunter <bwall@ballastsecurity.net>
Description:Identify njRat

File information

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

Web download

njrat

Executable exe a28b2f50eb31526831a83bbc71407ca6f6400862a11b9d43c7246902a0cc6681

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1058776/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/123619/

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