MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 337a895245dcdbe522c4320dbe1dfd62e346aecad8246f9b895a5460211865b0. 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 1 YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 337a895245dcdbe522c4320dbe1dfd62e346aecad8246f9b895a5460211865b0
SHA3-384 hash: c7f3edd7528320639668080a8b61a853fc6f20db3820d4c59dba7b19fce3603f98b93e4eb90bd6e78d6d1b7813b938cc
SHA1 hash: 76e8f6f17e7074fd7b92ea24b3fe712be752e4b7
MD5 hash: 66b4a92c9fc61f5db2756d287621c768
humanhash: double-uncle-sixteen-asparagus
File name:66B4A92C9FC61F5DB2756D287621C768.exe
Download: download sample
Signature njrat
Create hunting rule
File size:28'832 bytes
First seen:2021-04-23 17:46:07 UTC
Last seen:2021-04-23 18:50:05 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 384:qI13TOP/2HZ9T8KOCESfo3iy2mN8aBnK28fMXb7OI+YEjuyDZtKg6Wh:h3TOPmZxWH4s8aJ9H7wYEyyDZjjh
Threatray 247 similar samples on MalwareBazaar
TLSH 88D24B80F2465D57D826793541F27A0427B6FAD13E5AEA2B7F4C88E0B9033C7894C6ED
Reporter abuse_ch
Tags:exe NjRAT RAT


Avatar
abuse_ch
njrat C2:
91.109.184.6:7400

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
91.109.184.6:7400 https://threatfox.abuse.ch/ioc/9769/

Intelligence

File Origin
# of uploads :
2
# of downloads :
160
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/143922/
Detection(s):
SecuriteInfo.com.Trojan.Siggen13.9900.4542.26882.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
DNS request
Creating a file
Using the Windows Management Instrumentation requests
Creating a window
Sending a UDP request
Sending an HTTP GET request to an infection source
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.
Malware family:
Generic Malware
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/3844f7f4-9faa-4e47-ba76-6c4ad8998582
Result
Threat name:
Njrat
Create hunting rule
Detection:
malicious
Classification:
troj.adwa.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/695773
Signature
Adds a directory exclusion to Windows Defender
Creates an autostart registry key pointing to binary in C:\Windows
Creates multiple autostart registry keys
Drops executables to the windows directory (C:\Windows) and starts them
Drops PE files to the startup folder
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 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: Powershell adding suspicious path to exclusion list
Tries to delay execution (extensive OutputDebugStringW loop)
Yara detected Njrat
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 396807 Sample: K08gQWTMLk.exe Startdate: 23/04/2021 Architecture: WINDOWS Score: 100 55 lorixo666.sytes.net 2->55 59 Malicious sample detected (through community Yara rule) 2->59 61 Multi AV Scanner detection for dropped file 2->61 63 Sigma detected: Powershell adding suspicious path to exclusion list 2->63 65 3 other signatures 2->65 8 K08gQWTMLk.exe 24 12 2->8         started        13 svchost.exe 2->13         started        15 svchost.exe 2->15         started        17 6 other processes 2->17 signatures3 process4 dnsIp5 57 mmwrlridbhmibnr.ml 172.67.220.147, 49735, 80 CLOUDFLARENETUS United States 8->57 49 C:\Windows\Resources\Themes\...\svchost.exe, PE32 8->49 dropped 51 ucMgsACvtbUwZiTkgb...CofAWNEMOtbKMxI.exe, PE32 8->51 dropped 53 C:\Users\user\AppData\...\AdvancedRun.exe, PE32 8->53 dropped 69 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 8->69 71 Creates multiple autostart registry keys 8->71 73 Drops PE files to the startup folder 8->73 77 6 other signatures 8->77 19 K08gQWTMLk.exe 8->19         started        23 cmd.exe 8->23         started        25 powershell.exe 8 8->25         started        29 10 other processes 8->29 75 Multi AV Scanner detection for dropped file 13->75 27 WerFault.exe 15->27         started        file6 signatures7 process8 file9 45 C:\Users\user\AppData\Local\...\svchost.exe, PE32 19->45 dropped 47 C:\Users\user\AppData\...\K08gQWTMLk.exe.log, ASCII 19->47 dropped 67 Creates multiple autostart registry keys 19->67 31 conhost.exe 23->31         started        33 timeout.exe 23->33         started        35 conhost.exe 25->35         started        37 AdvancedRun.exe 29->37         started        39 conhost.exe 29->39         started        41 conhost.exe 29->41         started        43 5 other processes 29->43 signatures10 process11
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/337a895245dcdbe522c4320dbe1dfd62e346aecad8246f9b895a5460211865b0/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-04-20 17:13:18 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=gn5isusf3tn6kiwegig34hp5mlrunlwk3asg7g4jljkgaiiymwya._file
Verdict:
malicious
Similar samples:
2e727d9a26813a05ad6371ab7d4c71387dcb9b9bc99f0e23bcb52a48e3e5ea92
njrat
52898077d59e820a64decb2133661ee42a36259da3fb5e6bfbb6c6269fed7bf4
njrat
532156143b3090b5036a00550bcd98e05d7805ccbbeb2170ae26888d626a64ac
njrat
6906ef12bac9de7c7867bb067e2c7415680e07ffca9b9b3523cc2843e2174d7b
njrat
7db8c02cc05e287e3d0219807e5e505b44f19180fa6401bc47107e92f36dd3ff
njrat
962166f0ef5b1d6dd3e73c03575b5de20220feabe4f13a63d6441e66d1164563
njrat
ae0e4f562ecbe6754699d92948d01d4080401d92bb2778e0d2f2ca7caf787cee
njrat
b9f87900e53b232ee34c913e7b66cc0fa420dd3af54b12ff25fcbf1c64d0d934
njrat
e4462cda605a876b2c8f72bcecbabd3e1abb00303a78047892ce463afef53127
njrat
fda5edf4ca47ece8679d1e04e75d9af9f6ccf6510d56d2fe819f72ca09ec33d9
njrat
+ 237 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  10/10
Tags:
evasion trojan
Link:
https://tria.ge/reports/210423-kgxwzhyscx/
Behaviour
Delays execution with timeout.exe
Modifies system certificate store
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Views/modifies file attributes
Enumerates physical storage devices
Program crash
Drops file in Windows directory
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
Looks for VirtualBox Guest Additions in registry
Nirsoft
Modifies Windows Defender Real-time Protection settings
Turns off Windows Defender SpyNet reporting
Windows security bypass
Unpacked files
SH256 hash:
337a895245dcdbe522c4320dbe1dfd62e346aecad8246f9b895a5460211865b0
MD5 hash:
66b4a92c9fc61f5db2756d287621c768
SHA1 hash:
76e8f6f17e7074fd7b92ea24b3fe712be752e4b7
Link:
https://www.unpac.me/results/421d4e2e-6201-4a7d-8eed-8bf7f7f2867b/
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:INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse
Create hunting rule
Author:ditekSHen
Description:Detects file containing reversed ASEP Autorun registry keys
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:Reverse_text_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Reverse text detected

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/143922/

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