MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ff25936286221005b27254e316c0622a3e828791a2988c163613475263127c0f. 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: 8


Intelligence 8 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ff25936286221005b27254e316c0622a3e828791a2988c163613475263127c0f
SHA3-384 hash: 8d5cb396f539548198b8a44327ef6a15aa42684a03fe45ba42cccdf03f084bd95e5252740cbd19d299565299393f04a6
SHA1 hash: 3500ece50cf2a52e7f2cbf7acbf8add9654f5f37
MD5 hash: b18a815ebb7d8f397768ac09edd202bc
humanhash: nevada-utah-artist-delta
File name:rfq00092.exe
Download: download sample
Signature njrat
Create hunting rule
File size:348'160 bytes
First seen:2020-11-09 16:07:20 UTC
Last seen:2020-11-15 22:46:28 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 6144:/xMm54toTTRdBHMlU8LFFEXvgQUI5Qdd0uOEoGib557CHw7uit:OUt8LFFEfgm5QxO5Gi157CHw7
Threatray 67 similar samples on MalwareBazaar
TLSH 2474AC373541BD9EF75B8C77D4A42F741E60AC3B8B06D60AB88B31A9113C65A8E016FD
Reporter abuse_ch
Tags:exe NjRAT RAT


Avatar
abuse_ch
Malspam distributing njrat:

HELO: topnewsemaillist.info
Sending IP: 64.188.28.27
From: Brendan Osthuzen <sales@topnewsemaillist.info>
Reply-To: mcsylva007@yandex.ru
Subject: Please Update us on this Order
Attachment: rfq00092.rar (contains "rfq00092.exe")

Intelligence

File Origin
# of uploads :
5
# of downloads :
116
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.BehavesLike.Win32.Generic.fc.19936.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file
Creating a file in the %temp% directory
Creating a process from a recently created file
Unauthorized injection to a recently created process
Result
Verdict:
SUSPICIOUS
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:
spre.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/526743
Signature
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Changes the view of files in windows explorer (hidden files and folders)
Contains functionality to log keystrokes (.Net Source)
Contains functionality to spread to USB devices (.Net source)
Creates autostart registry keys with suspicious names
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Modifies the windows firewall
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses netsh to modify the Windows network and firewall settings
Yara detected AntiVM_3
Yara detected Njrat
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 312465 Sample: rfq00092.exe Startdate: 09/11/2020 Architecture: WINDOWS Score: 100 49 Malicious sample detected (through community Yara rule) 2->49 51 Multi AV Scanner detection for submitted file 2->51 53 Yara detected AntiVM_3 2->53 55 9 other signatures 2->55 10 rfq00092.exe 3 2->10         started        13 server.exe 2 2->13         started        15 server.exe 2 2->15         started        17 server.exe 2 2->17         started        process3 file4 41 C:\Users\user\AppData\...\rfq00092.exe.log, ASCII 10->41 dropped 19 rfq00092.exe 3 2 10->19         started        22 server.exe 13->22         started        24 server.exe 15->24         started        26 server.exe 17->26         started        process5 file6 39 C:\Users\user\AppData\Local\Temp\server.exe, PE32 19->39 dropped 28 server.exe 3 19->28         started        process7 signatures8 57 Multi AV Scanner detection for dropped file 28->57 59 Machine Learning detection for dropped file 28->59 31 server.exe 4 2 28->31         started        process9 dnsIp10 43 64.188.28.27, 5551 ASN-QUADRANET-GLOBALUS United States 31->43 45 Changes the view of files in windows explorer (hidden files and folders) 31->45 47 Creates autostart registry keys with suspicious names 31->47 35 netsh.exe 1 3 31->35         started        signatures11 process12 process13 37 conhost.exe 35->37         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ff25936286221005b27254e316c0622a3e828791a2988c163613475263127c0f/
Threat name:
ByteCode-MSIL.Trojan.Sudloader
Create hunting rule
Status:
Malicious
First seen:
2020-11-09 14:21:24 UTC
File Type:
PE (.Net Exe)
Extracted files:
5
AV detection:
25 of 29 (86.21%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=74szgyugeiialmtsktrrnqdcfi7ifb4rukmiyfrwcndveyyspqhq._file
Verdict:
malicious
Similar samples:
0039b78d69f0c4d19035fdc8a5b3508c9a1f69cbb0a7011f2427febadb905aba
njrat
00b11363c9cd9f5e944789c5c8c8f190cb8952e572fcad351c10a0ffe4809765
njrat
08da1c7771ae637a3b09d9d636b97d6cefdd1794fe3de4ade9b676188e057370
njrat
21ac08fc21c99e9c3522c3555adc2e54fdada5297deda9f00304694a47e1a9e6
njrat
81553f2de290ddf3a7dd40e0a8877781c8ac8cfb0fe5d0159a2b3ce3eda4c6f6
njrat
82627d2ae3b9f73237e422cd9b5c90aa5ae978e897fae447f06c1ec23e83a778
njrat
b85e964144a64d78fc54b4e6bae83ba6e1c7179f0a820f361c27f58842b6940a
njrat
b99755b5ef8145a14c9997d0702cad519f1768978c5b985da7bfc720d7de4152
njrat
cd0133076bb2594d02cc1a9ef7976ce41006ebc60c7f84b64a8199b4801f2ec5
njrat
dd0034d34e27eec19757f2d0b46c617fad9f461380aae7c79cb9cfd5f1df0a45
njrat
+ 57 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  8/10
Tags:
evasion persistence
Link:
https://tria.ge/reports/201109-6mgtbf7vrj/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Modifies service
Suspicious use of SetThreadContext
Adds Run key to start application
Drops startup file
Loads dropped DLL
Executes dropped EXE
Modifies Windows Firewall
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kryptik
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/ff25936286221005b27254e316c0622a3e828791a2988c163613475263127c0f

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:IPPort_combo_mem
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
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
Description:Identify njRat

File information

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

Malspam

njrat

rar e47990f5090073f082d15cd09b259f1c7e8481ea70c99238f4a87afd94f9e9b7

njrat

Executable exe ff25936286221005b27254e316c0622a3e828791a2988c163613475263127c0f

(this sample)

  
Dropped by
MD5 9fa9f4bf25a868b8204bfb0ea026fba0
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 e47990f5090073f082d15cd09b259f1c7e8481ea70c99238f4a87afd94f9e9b7

Comments