MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b85e964144a64d78fc54b4e6bae83ba6e1c7179f0a820f361c27f58842b6940a. 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: b85e964144a64d78fc54b4e6bae83ba6e1c7179f0a820f361c27f58842b6940a
SHA3-384 hash: 6d7f5683bdad6d050f3aa76c58bd0b7397e85e983f4db0394931c5672dec847c1fa138afbef31c1e50ca08b7611167a1
SHA1 hash: e8161e196738305a52317c9f1706c4d50683f357
MD5 hash: 3b2ad70cd2c1320e6a1a15680330684f
humanhash: undress-double-carbon-connecticut
File name:monday.exe
Download: download sample
Signature njrat
Create hunting rule
File size:671'744 bytes
First seen:2020-10-19 10:09:22 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'665 x AgentTesla, 19'478 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:D2ixEW+ZdLKwBALnUXKP0Lsc6bUBeu9tETBuk7w6k3+5qigoZ:DFxEW+XsnUaP0LR3L0ukbkvoZ
Threatray 65 similar samples on MalwareBazaar
TLSH 29E46C651A58AF58E47C0333D4A4248197F9BD03D331C85E7CE93A8E5EB1FA59323B86
Reporter abuse_ch
Tags:exe NjRAT RAT


Avatar
abuse_ch
Malspam distributing njrat:

HELO: mrnewsemaillist.info
Sending IP: 106.75.21.253
From: sales@mrnewsemaillist.info
Reply-To: chrisfasai@yandex.ru
Subject: Re:Re completed
Attachment: monday.rar (contains "monday.exe")

NjRAT C2:
64.188.28.27:5551

Intelligence

File Origin
# of uploads :
1
# of downloads :
118
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Njrat
Create hunting rule
Link:
https://www.capesandbox.com/analysis/72861/
Detection(s):
SecuriteInfo.com.BehavesLike.Win32.Generic.jh.30977.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
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
Threat name:
Njrat
Create hunting rule
Detection:
malicious
Classification:
spre.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/495204
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
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)
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: 300056 Sample: monday.exe Startdate: 19/10/2020 Architecture: WINDOWS Score: 100 51 Malicious sample detected (through community Yara rule) 2->51 53 Multi AV Scanner detection for submitted file 2->53 55 Yara detected AntiVM_3 2->55 57 9 other signatures 2->57 11 monday.exe 3 2->11         started        15 server.exe 2 2->15         started        17 server.exe 2 2->17         started        19 server.exe 2->19         started        process3 file4 47 C:\Users\user\AppData\...\monday.exe.log, ASCII 11->47 dropped 63 Injects a PE file into a foreign processes 11->63 21 monday.exe 3 2 11->21         started        24 monday.exe 11->24         started        26 server.exe 15->26         started        28 server.exe 17->28         started        signatures5 process6 file7 45 C:\Users\user\AppData\Local\Temp\server.exe, PE32 21->45 dropped 30 server.exe 3 21->30         started        33 conhost.exe 24->33         started        process8 signatures9 65 Multi AV Scanner detection for dropped file 30->65 67 Machine Learning detection for dropped file 30->67 69 Injects a PE file into a foreign processes 30->69 35 server.exe 4 2 30->35         started        process10 dnsIp11 49 64.188.28.27, 5551 ASN-QUADRANET-GLOBALUS United States 35->49 59 Changes the view of files in windows explorer (hidden files and folders) 35->59 61 Creates autostart registry keys with suspicious names 35->61 39 netsh.exe 1 3 35->39         started        signatures12 process13 process14 41 conhost.exe 39->41         started        process15 43 server.exe 41->43         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b85e964144a64d78fc54b4e6bae83ba6e1c7179f0a820f361c27f58842b6940a/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2020-10-19 09:33:09 UTC
AV detection:
21 of 28 (75.00%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=xbpjmqkeuzgxr7cuwttlv2b3u3q4of47bkba6nq4e72yqqvwsqfa._file
Verdict:
malicious
Similar samples:
11f4bcfdc01572c04515d3336820f7135528bf66673b5ed61a3dff4362342c81
njrat
2ac56457e5dfd887f318ab16bbc8fa9711095b8cb4cae99f5a34358c9a8502f0
njrat
8192d560e89e235f4734cf4ad8fa3a9a91abd7eb83b589c4d471efc5d6361f1d
njrat
a2158f5ab307d2418f9653ea6bfd8914fe390a99137ee96191266c01ba93977a
njrat
a88d09e31b3d69e78b88c96f053a9afbe29daa59fc50e5ba269f4a24b3a04d88
njrat
aa95f30da548dae9304cea73e276f87fdab530186aec142eb83022f1f31f5cb6
njrat
c1db0bc7089675799a66c321a0401a402b94e0d455037b0cbd76e54188de43c8
njrat
c68e4b825434bac34abd9d5428ea2c30fc60c8b47db17de743782825687547d5
njrat
e232dc56a916d659961271caf129b47c5fa561f71ecff17f6c96801cd7b50820
njrat
e4a3e20e267b49025b0c602b0af5b19c57711fc07f5442c356d5c57e1ee7cd31
njrat
+ 55 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  8/10
Tags:
evasion persistence
Link:
https://tria.ge/reports/201019-zl3s7zbmfs/
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
Unpacked files
SH256 hash:
b85e964144a64d78fc54b4e6bae83ba6e1c7179f0a820f361c27f58842b6940a
MD5 hash:
3b2ad70cd2c1320e6a1a15680330684f
SHA1 hash:
e8161e196738305a52317c9f1706c4d50683f357
Link:
https://www.unpac.me/results/b276d3a1-683c-4f0d-b323-9388f0903a96/
SH256 hash:
adad81cb9525c9d8b8dbf2d5132bd6cfd57ebce249fa41bc5d9a48866dad376f
MD5 hash:
29966d4821a2079f2c0dca52a810e690
SHA1 hash:
503e5802eb0bad45beedcfba6b2f80d05a9a9733
Link:
https://www.unpac.me/results/b276d3a1-683c-4f0d-b323-9388f0903a96/
SH256 hash:
f1a6f8d20df83d98120b497974e8cfe2ceb2d5769f66f9522da9c636627f5a72
MD5 hash:
6c0048ab6cb541d905be9e4bf5fd6eb8
SHA1 hash:
515788df22d7b1ac75438ad4dcdfe6ecdc5c666c
Link:
https://www.unpac.me/results/b276d3a1-683c-4f0d-b323-9388f0903a96/
SH256 hash:
bac5797bde4b2810766a40d95bcdb825ac5b395fcbadd139daa19a44a6cdc049
MD5 hash:
a92cc1f6e0a2742350dfda6726db14c0
SHA1 hash:
e5404e3ed46498deb8ad8966a774540c2b8e9c1e
Link:
https://www.unpac.me/results/b276d3a1-683c-4f0d-b323-9388f0903a96/
SH256 hash:
ec48170e9de44632227e5f3dbfc912bcc7510e6954c626446f9d7b36d78a0c41
MD5 hash:
d52bdb2c581465ad40f34455daf81573
SHA1 hash:
f64c82e23b772b9ceb41f8397c15963e6a728156
Detections:
win_njrat_w1
Create hunting rule
win_njrat_g1
Create hunting rule
Link:
https://www.unpac.me/results/b276d3a1-683c-4f0d-b323-9388f0903a96/
Parent samples :
df91e3d8c094bb91bbc717a36ff7d42302b5f362aedde2333fac71cd42010a28
b85e964144a64d78fc54b4e6bae83ba6e1c7179f0a820f361c27f58842b6940a
81553f2de290ddf3a7dd40e0a8877781c8ac8cfb0fe5d0159a2b3ce3eda4c6f6
6e112a24130b1ef283d6966f4f84a9011fea4747e56c1884f75d449540a7c8df
3c62c78790e9af4f08177ae16bced8501967a30658db2c46fd638e48cfbc9b56
9dcd9722bae8dd0260f641d522553454b3f7fbc8df49ebb989a9257f38f42cec
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/b85e964144a64d78fc54b4e6bae83ba6e1c7179f0a820f361c27f58842b6940a

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 fa89c2845bab972074a66caa306d6b39319c9dbdc94aecb004243bc674cd8255

njrat

Executable exe b85e964144a64d78fc54b4e6bae83ba6e1c7179f0a820f361c27f58842b6940a

(this sample)

  
Dropped by
MD5 f6ae1ee5084b02ede6ba7d58779a0149
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 fa89c2845bab972074a66caa306d6b39319c9dbdc94aecb004243bc674cd8255
Cape
Cape
https://www.capesandbox.com/analysis/72861/

Comments