MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ac07d51b6ae3a8741f6fc3e4701a2a752ec51b058123de7982aa9aa757a7a56e. 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: 12


Intelligence 12 IOCs YARA 8 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ac07d51b6ae3a8741f6fc3e4701a2a752ec51b058123de7982aa9aa757a7a56e
SHA3-384 hash: 2738c0147e558d27f1e8f446129f51bc8a0082f928aafc42e047cb9db33a82cd95920840af4afe0b7fbf0a57f57a0b3d
SHA1 hash: a092705ca438e32b416ca0c01f168e7358200602
MD5 hash: 16ae594c3f727ba5b54be7d57e697e25
humanhash: december-illinois-virginia-cup
File name:16ae594c3f727ba5b54be7d57e697e25
Download: download sample
Signature njrat
Create hunting rule
File size:802'816 bytes
First seen:2022-03-01 09:25:12 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 12288:2gY0QPDnu/m4xxIkjFqqYcpBK7oG+LDIw6UpoZB2HDkgBUfI70j+9m:2zLLnu/mYfqqtp7GI7ps2HDkgGfIism
Threatray 123 similar samples on MalwareBazaar
TLSH T1B305024023AE87A5CBFA1B78B42140228B6DD785612ADB3E7E40EDED6C177444D12B7F
Reporter zbetcheckin
Tags:32 exe NjRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
249
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
38a04613c77312edda01d1b694e0b0c23dda50e54f09391a1a3ee7a4185f5c4a.zip
Verdict:
Malicious activity
Analysis date:
2022-03-01 00:02:02 UTC
Tags:
encrypted trojan opendir exploit CVE-2017-11882 loader
Link:
https://app.any.run/tasks/7b2df41e-b1dd-4285-9532-de6ed23c73b0

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Njrat
Create hunting rule
Link:
https://www.capesandbox.com/analysis/245665/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.1218.26214.26989.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Adding an access-denied ACE
Using the Windows Management Instrumentation requests
Сreating synchronization primitives
Launching a process
Creating a process with a hidden window
Creating a file
Creating a window
Sending a custom TCP request
Creating a file in the %AppData% subdirectories
Sending an HTTP GET request
DNS request
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Setting a single autorun event
Adding exclusions to Windows Defender
Unauthorized injection to a system process
Enabling autorun by creating a file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
control.exe msbuild.exe obfuscated packed replace.exe
Link:
https://www.filescan.io/uploads/621de6b0b94fb38cb42d0534/reports/ff2cf287-bfef-49b1-b581-7d2c0aafcca2/overview
Result
Verdict:
UNKNOWN
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:
njRAT
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/2e224931-8664-4d74-8895-f440d069e6ea
Result
Threat name:
Njrat
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/948051
Signature
.NET source code references suspicious native API functions
Adds a directory exclusion to Windows Defender
Contains functionality to hide user accounts
Drops PE files with benign system names
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: Bad Opsec Defaults Sacrificial Processes With Improper Arguments
Sigma detected: File Created with System Process Name
Sigma detected: New RUN Key Pointing to Suspicious Folder
Sigma detected: Powershell Defender Exclusion
Sigma detected: Suspcious CLR Logs Creation
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Yara detected AntiVM3
Yara detected Njrat
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 580530 Sample: 45OAtPOpgn Startdate: 01/03/2022 Architecture: WINDOWS Score: 100 37 oluakachuks.linkpc.net 23.226.130.229, 2028, 49745 ASN-QUADRANET-GLOBALUS United States 2->37 43 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->43 45 Malicious sample detected (through community Yara rule) 2->45 47 Multi AV Scanner detection for submitted file 2->47 49 11 other signatures 2->49 8 45OAtPOpgn.exe 4 6 2->8         started        12 svchost.exe 2->12         started        14 svchost.exe 9 1 2->14         started        17 7 other processes 2->17 signatures3 process4 dnsIp5 31 C:\Users\Public\Documents\...\svchost.exe, PE32 8->31 dropped 33 C:\Users\user\AppData\...\45OAtPOpgn.exe.log, ASCII 8->33 dropped 51 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 8->51 53 Adds a directory exclusion to Windows Defender 8->53 55 Drops PE files with benign system names 8->55 19 powershell.exe 24 8->19         started        21 powershell.exe 26 8->21         started        23 powershell.exe 8->23         started        35 C:\Users\user\AppData\...\svchost.exe.log, ASCII 12->35 dropped 57 Multi AV Scanner detection for dropped file 12->57 39 127.0.0.1 unknown unknown 14->39 41 192.168.2.1 unknown unknown 17->41 file6 signatures7 process8 process9 25 conhost.exe 19->25         started        27 conhost.exe 21->27         started        29 conhost.exe 23->29         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ac07d51b6ae3a8741f6fc3e4701a2a752ec51b058123de7982aa9aa757a7a56e/
Threat name:
ByteCode-MSIL.Trojan.KryptikAGen
Create hunting rule
Status:
Malicious
First seen:
2022-02-28 23:59:52 UTC
File Type:
PE (.Net Exe)
Extracted files:
5
AV detection:
21 of 27 (77.78%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=vqd5kg3k4ouhih3pypshagrkouxmkgyfqer546mcvknkov5huvxa._file
Verdict:
malicious
Similar samples:
05cf0030cb0f2737e80489e3a524e13d1c26bc21d7bf0162602251db76ebe8f6
njrat
667e5e3584ef11bc6dc12e693546b3a62cb487d507379e9dc4be3a1767d80be9
njrat
6dd535cb334ca75f6dca60301843d21b1eb63b8a46409a32b48b899b0c4ff7ea
njrat
895f390d56ade378e72f343465d78ed3f3f98ab04a3fb3e2e2616184e566b6c5
njrat
9810ab66c158dd9b0a7ca2a298c2cd00d1d682d146499b0854f41e92d7e709ae
njrat
aba2e55882d1e799163189253abcc67fbd46dcac42c154956de544da02ff6e51
njrat
e5756a6f00931a9c730e1ed2e4c38cb58b70ea64d5a10beae7f7817952c306a4
njrat
+ 113 additional samples on MalwareBazaar
Result
Malware family:
njrat
Create hunting rule
Score:
  10/10
Tags:
family:njrat botnet:4k4nch4w4 evasion persistence trojan
Link:
https://tria.ge/reports/220301-ld7kqsheb6/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Maps connected drives based on registry
Checks BIOS information in registry
Checks computer location settings
Drops startup file
Windows security modification
Looks for VMWare Tools registry key
Looks for VirtualBox Guest Additions in registry
Windows security bypass
njRAT/Bladabindi
Malware Config
C2 Extraction:
oluakachuks.linkpc.net:2028
Unpacked files
SH256 hash:
ac07d51b6ae3a8741f6fc3e4701a2a752ec51b058123de7982aa9aa757a7a56e
MD5 hash:
16ae594c3f727ba5b54be7d57e697e25
SHA1 hash:
a092705ca438e32b416ca0c01f168e7358200602
Link:
https://www.unpac.me/results/711819cc-608e-4f85-bc16-2347fe8c452e/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/ac07d51b6ae3/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.54
Link:
https://yomi.yoroi.company/submissions/ac07d51b6ae3a8741f6fc3e4701a2a752ec51b058123de7982aa9aa757a7a56e

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:CN_disclosed_20180208_c_RID2E71
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_EXE_attrib
Create hunting rule
Author:ditekSHen
Description:Detects executables using attrib with suspicious attributes attributes
Rule name:malware_Njrat_strings
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect njRAT in memory
Rule name:MALWARE_Win_NjRAT
Create hunting rule
Author:ditekSHen
Description:Detects NjRAT / Bladabindi
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Web download

njrat

Executable exe ac07d51b6ae3a8741f6fc3e4701a2a752ec51b058123de7982aa9aa757a7a56e

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2068272/
Cape
Cape
https://www.capesandbox.com/analysis/245665/

Comments


Avatar
zbet commented on 2022-03-01 09:25:13 UTC

url : hxxp://54.68.90.198/32/vbc.exe