MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a8f7563c99b15e437837d480481906ddd026bb63e1c25bb61edd9cb20d72a413. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a8f7563c99b15e437837d480481906ddd026bb63e1c25bb61edd9cb20d72a413
SHA3-384 hash: c308223bbf46e7859b0ef91b4a14bf6a0d8cde02a7143a646b949a0d53914635024849a0103a06f9bfe615d69b68b468
SHA1 hash: 4018514b8ee5edb6a855d5ce6cd1d5b7870c2c15
MD5 hash: ef1c6b90282b53ee6348590de2d30730
humanhash: ack-monkey-timing-charlie
File name:5fihkJ86.exe
Download: download sample
Signature njrat
Create hunting rule
File size:32'768 bytes
First seen:2020-10-26 20:15:13 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 384:9jNax0ont9WBsi1xh+bFDFoFPIWEXTcMTNlD8odg9TdFpyFEIGsJjwE7UMcrie4J:p+RIxhsc6qouDbEEIGfRr+fR
Threatray 121 similar samples on MalwareBazaar
TLSH 3EE2194CB6E38154D47D45B785A6E32117B4E16B5323E26FCED868E22FA71CC4A8CDE0
Reporter pmelson
Tags:exe NjRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
111
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Njrat
Create hunting rule
Link:
https://www.capesandbox.com/analysis/79534/
Detection(s):
Win.Trojan.Ratenjay-1
Create hunting rule

Win.Trojan.Bladabindi-6192388-0
Create hunting rule

Win.Trojan.Generic-6417450-0
Create hunting rule

Win.Trojan.Generic-6454614-0
Create hunting rule

Win.Trojan.Generic-6454615-0
Create hunting rule

Win.Dropper.njRAT-7436651-0
Create hunting rule

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

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a process from a recently created file
Creating a file
Creating a process with a hidden window
Creating a window
DNS request
Connection attempt
Unauthorized injection to a recently created process
Launching the process to change the firewall settings
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.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/512783
Signature
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Contains functionality to log keystrokes (.Net Source)
Creates autostart registry keys with suspicious names
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)
Modifies the windows firewall
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Protects its processes via BreakOnTermination flag
Sigma detected: System File Execution Location Anomaly
Uses netsh to modify the Windows network and firewall settings
Yara detected Njrat
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 305507 Sample: 5fihkJ86.exe Startdate: 27/10/2020 Architecture: WINDOWS Score: 100 32 zapkel.kro.kr 2->32 36 Malicious sample detected (through community Yara rule) 2->36 38 Antivirus detection for dropped file 2->38 40 Antivirus / Scanner detection for submitted sample 2->40 42 12 other signatures 2->42 9 5fihkJ86.exe 1 5 2->9         started        13 csrss.exe 3 2->13         started        15 csrss.exe 2 2->15         started        17 csrss.exe 2 2->17         started        signatures3 process4 file5 30 C:\Users\user\AppData\Local\Temp\csrss.exe, PE32 9->30 dropped 52 Drops PE files with benign system names 9->52 19 csrss.exe 4 5 9->19         started        signatures6 process7 dnsIp8 34 zapkel.kro.kr 211.176.30.10, 1, 49729, 49735 SKB-ASSKBroadbandCoLtdKR Korea Republic of 19->34 28 C:\...\a1c3b640b5abb4b39436864ddec0d801.exe, PE32 19->28 dropped 44 Antivirus detection for dropped file 19->44 46 Multi AV Scanner detection for dropped file 19->46 48 Protects its processes via BreakOnTermination flag 19->48 50 3 other signatures 19->50 24 netsh.exe 1 3 19->24         started        file9 signatures10 process11 process12 26 conhost.exe 24->26         started       
Detection:
njrat
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a8f7563c99b15e437837d480481906ddd026bb63e1c25bb61edd9cb20d72a413/
Threat name:
ByteCode-MSIL.Backdoor.Bladabhindi
Create hunting rule
Status:
Malicious
First seen:
2020-10-26 20:17:03 UTC
AV detection:
25 of 29 (86.21%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=vd3vmpezwfpeg6bx2saeqgig3xicno3d4hbfxnq63woledlsuqjq._file
Verdict:
malicious
Similar samples:
1c173e9edc5cee7bfb972a72c7d8912908829ee999baf97efe1530390a49db79
njrat
4e841bebe76a59f454a911753d8d7fd9bfb082722ccd4dbf69316ceacf1363e9
njrat
592860b73161414eaddbde6679f9ad1771bff2e432a598d6cae471a6564fc0af
njrat
a1e16a174469eadd7c6250c165be7348c4f881ef684b3ef29eef51c230457418
njrat
a6523723ed424d8f2f640f374f145af0839f1d114cc9788d902f5a64a3ccb3a5
njrat
b2f041348835c102db3769245ee4c28dd00cb19c3c6710fc9c11228f3bbce61b
njrat
d0efa3ab13db442fa9d9958083f1bb9891ea29d8055f193e38cf0f4ec80498c4
njrat
d594da22a71e20db228fa34aaf397bcde745cf987612a70473aee642ad38729c
njrat
e339b85bc8bc77d1316a0e93ab46a440c319082b76403654b3687c7911e81cc0
njrat
e3deba276ca79cf6617fe6ba8f2c414d5fd078a82c87f3e6a62c7316095430c2
njrat
+ 111 additional samples on MalwareBazaar
Result
Malware family:
njrat
Create hunting rule
Score:
  10/10
Tags:
trojan family:njrat evasion persistence
Link:
https://tria.ge/reports/201026-ysfk6yeffe/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Modifies service
Adds Run key to start application
Drops startup file
Loads dropped DLL
Executes dropped EXE
Modifies Windows Firewall
njRAT/Bladabindi
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: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
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.

Web download

njrat

Executable exe a8f7563c99b15e437837d480481906ddd026bb63e1c25bb61edd9cb20d72a413

(this sample)

  
Link
https://www.virustotal.com/gui/file/a8f7563c99b15e437837d480481906ddd026bb63e1c25bb61edd9cb20d72a413/detection
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/79534/

Comments