MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f38a18da44181fc1eb7c5a2d8e323491506ad5141cf7e49545712963e0a1a4d9. 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: 7


Intelligence 7 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f38a18da44181fc1eb7c5a2d8e323491506ad5141cf7e49545712963e0a1a4d9
SHA3-384 hash: b5c6d398d09b21b1c3e77ba55c74d1cd288d4bb0e1c0f51fd02ff25cf52e04a28116bc5317eef3119b5b081768d314b2
SHA1 hash: 860d5e97c4b5f56cf27d746767c1ffd870eba817
MD5 hash: 97b753744f98dfaeb252b45be51d0175
humanhash: echo-wolfram-idaho-fanta
File name:AvUERMeF.exe
Download: download sample
Signature njrat
Create hunting rule
File size:44'032 bytes
First seen:2020-10-02 20:32:21 UTC
Last seen:2020-10-02 21:02:20 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep 384:X7Zyq2XN0Vyoy773QkX6IsMpj5uYa9D9O5UE5QzwBlpJNakkjh/TzF7pWnQvgre/:X11AKgl/gkX3pXvQO+FV+L
Threatray 21 similar samples on MalwareBazaar
TLSH 6F13E88CB684E275D6FF8BF1B492B2890B71901B9902D30F99F154DD4BB3AC09611EE7
Reporter pmelson
Tags:exe NjRAT Njratgold

Intelligence

File Origin
# of uploads :
2
# of downloads :
277
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Njrat
Create hunting rule
Link:
https://www.capesandbox.com/analysis/67804/
Detection(s):
Win.Trojan.Generic-6417450-0
Create hunting rule

Win.Packed.Generic-7672855-0
Create hunting rule

Win.Packed.njRAT-7672853-1
Create hunting rule

Win.Packed.Msilperseus-9220094-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Creating a file in the %AppData% directory
Creating a process from a recently created file
Creating a file
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Enabling the 'hidden' option for recently created files
Creating a window
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Enabling autorun by creating a file
Result
Threat name:
njRat
Create hunting rule
Detection:
malicious
Classification:
troj.adwa.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/480605
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Changes security center settings (notifications, updates, antivirus, firewall)
Detected njRat
Drops PE files to the startup folder
Drops PE files with benign system names
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Protects its processes via BreakOnTermination flag
Sigma detected: Suspicious Svchost Process
Sigma detected: System File Execution Location Anomaly
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
System process connects to network (likely due to code injection or exploit)
Uses dynamic DNS services
Uses schtasks.exe or at.exe to add and modify task schedules
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 292742 Sample: AvUERMeF.exe Startdate: 02/10/2020 Architecture: WINDOWS Score: 100 46 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->46 48 Malicious sample detected (through community Yara rule) 2->48 50 Antivirus detection for dropped file 2->50 52 11 other signatures 2->52 8 AvUERMeF.exe 1 5 2->8         started        12 Server.exe 3 2->12         started        14 svchost.exe 2->14         started        16 11 other processes 2->16 process3 dnsIp4 36 C:\Users\user\AppData\Roaming\svchost.exe, PE32 8->36 dropped 38 C:\Users\user\AppData\...\AvUERMeF.exe.log, ASCII 8->38 dropped 62 Drops PE files with benign system names 8->62 19 svchost.exe 3 6 8->19         started        64 Antivirus detection for dropped file 12->64 66 Multi AV Scanner detection for dropped file 12->66 68 Machine Learning detection for dropped file 12->68 70 Changes security center settings (notifications, updates, antivirus, firewall) 14->70 24 MpCmdRun.exe 14->24         started        40 127.0.0.1 unknown unknown 16->40 42 192.168.2.1 unknown unknown 16->42 file5 signatures6 process7 dnsIp8 44 1026ef32.ddns.net 83.99.228.138, 49734, 5353 LVBALTICOM-ASLV Latvia 19->44 32 C:\Users\user\AppData\...\Java update.exe, PE32 19->32 dropped 34 C:\Users\user\AppData\Local\Temp\Server.exe, PE32 19->34 dropped 54 Antivirus detection for dropped file 19->54 56 System process connects to network (likely due to code injection or exploit) 19->56 58 Protects its processes via BreakOnTermination flag 19->58 60 2 other signatures 19->60 26 schtasks.exe 1 19->26         started        28 conhost.exe 24->28         started        file9 signatures10 process11 process12 30 conhost.exe 26->30         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f38a18da44181fc1eb7c5a2d8e323491506ad5141cf7e49545712963e0a1a4d9/
Threat name:
ByteCode-MSIL.Backdoor.Bladabhindi
Create hunting rule
Status:
Malicious
First seen:
2020-10-02 20:34:06 UTC
AV detection:
26 of 29 (89.66%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=6ofbrwsedap4d234liwy4mrusfigvviudt36jfkfoeuwhyfbutmq._file
Verdict:
unknown
Similar samples:
04a4d40515b77903bb9472b01aaf951f059236999665e847a660ed99d929b78b
njrat
1b8b57fdccb30974af01938df1c16ade299d684fdf12278d7e1c4c036605a0c1
njrat
20aa773ce4d4e0709faeba02937cc789c114e726f6336c1dcd6c206f00514af2
njrat
28f39e656758b6c40db049e40bbfe958a7a20a754ea6531ccca3e4fdb8dcc66a
njrat
ab70b9ea05c74109550a361fe87229667204e610d5717aa00e7edbf2fdcef510
njrat
b3ea819ddfabf3e2060d9f8116e0952654d5bcdb5716f84ad142a6ab979b521a
njrat
c2a645b457a4ba814aa0c116f2a501176531ce29d32a695c45c5022d6aabb271
njrat
c6d93ae492f6a2b687c64cc388cf0a483f44428b843c5b384c156f018a2cf63c
njrat
e2136c8268bb5be4fe2a295a9bb9250c00437452cd3d65822290e3a68b1fb94b
njrat
eb086d6c54841616485b2ad99ed2e2e2ebc21f01e6c5a58611ac914f70b5042f
njrat
+ 11 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  8/10
Tags:
persistence
Link:
https://tria.ge/reports/201002-9t99v9vsqe/
Behaviour
Creates scheduled task(s)
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Adds Run key to start application
Drops startup file
Loads dropped DLL
Executes dropped EXE
Unpacked files
SH256 hash:
f38a18da44181fc1eb7c5a2d8e323491506ad5141cf7e49545712963e0a1a4d9
MD5 hash:
97b753744f98dfaeb252b45be51d0175
SHA1 hash:
860d5e97c4b5f56cf27d746767c1ffd870eba817
Link:
https://www.unpac.me/results/980f2745-0e78-425b-8208-e844a71f2659/
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/f38a18da44181fc1eb7c5a2d8e323491506ad5141cf7e49545712963e0a1a4d9

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:Njrat
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect njRAT in memory

File information

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

Web download

njrat

Executable exe f38a18da44181fc1eb7c5a2d8e323491506ad5141cf7e49545712963e0a1a4d9

(this sample)

  
Link
https://www.virustotal.com/gui/file/f38a18da44181fc1eb7c5a2d8e323491506ad5141cf7e49545712963e0a1a4d9/detection
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/67804/

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