MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 88bf0db97f3bf88a4b7f0aaff64cc4065cb5da6c140008e6cb22316da47428bb. 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: 19


Intelligence 19 IOCs YARA 32 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 88bf0db97f3bf88a4b7f0aaff64cc4065cb5da6c140008e6cb22316da47428bb
SHA3-384 hash: d1c1a02611abc9b751bc1c4eb88da4d52bd7ed17a252730865328381ca274be8efccfd65eb922dd242d49c8110d65544
SHA1 hash: c2584b38119ed749714178ed3fa8f5b4e98ec350
MD5 hash: b0d3794c8e0344c2ea7a975cfd838a53
humanhash: quebec-utah-orange-winner
File name:Runtime Broker.scr.exe
Download: download sample
Signature njrat
Create hunting rule
File size:236'544 bytes
First seen:2025-05-28 21:31:50 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep 6144:BxW0VD1J/5bTgVziHzZnSKrCbYMmVb78Vq:X7/5/gVziHlBrCbYN8s
TLSH T12D343966F6A101EBD4BE41348D635B02B7B2F4360721EBEF0B94589D3F637A04D29B91
TrID 48.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
28.5% (.EXE) InstallShield setup (43053/19/16)
6.9% (.EXE) Win64 Executable (generic) (10522/11/4)
4.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
3.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
Magika pebin
Reporter BastianHein
Tags:exe NjRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
473
Origin country :
CL CL
Vendor Threat Intelligence
Malware family:
njrat
Create hunting rule
ID:
1
File name:
Runtime Broker.scr.exe
Verdict:
Malicious activity
Analysis date:
2025-05-28 21:35:10 UTC
Tags:
auto-sch rat njrat bladabindi xworm
Link:
https://app.any.run/tasks/1a4387e1-2e2d-4e1f-a319-b8ea07af5576

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
R77
Create hunting rule
Link:
https://www.capesandbox.com/analysis/6099/
Detection(s):
Win.Malware.Lazy-10008179-0
Create hunting rule

Win.Malware.Lazy-10008180-0
Create hunting rule

Win.Dropper.Nanocore-10030076-0
Create hunting rule

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

Win.Trojan.B-468
Create hunting rule

Win.Trojan.Ratenjay-1
Create hunting rule

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

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6837826bacf88f5815e82e7a
Tags:
autorun cobalt emotet njrat
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a file in the %temp% directory
Сreating synchronization primitives
Creating a process from a recently created file
Launching a process
Forced system process termination
Unauthorized injection to a recently created process
DNS request
Connection attempt
Sending a custom TCP request
Sending an HTTP GET request
Searching for synchronization primitives
Creating a window
Creating a process with a hidden window
Setting browser functions hooks
Launching the process to change the firewall settings
Unauthorized injection to a system process
Unauthorized injection to a browser process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
adaptive-context anti-vm base64 cmd exploit fingerprint keylogger lolbin lolbin masquerade msbuild netsh njrat njrat obfuscated rat reconnaissance windows
Link:
https://www.filescan.io/uploads/68378118e336a33801dfc5c4/reports/9715e69f-3bd9-48c8-b081-6e055c9cb149/overview
Verdict:
Malicious
Labled as:
IL:Trojan.MSILZilla
Link:
https://www.hybrid-analysis.com/sample/88bf0db97f3bf88a4b7f0aaff64cc4065cb5da6c140008e6cb22316da47428bb
Malware family:
njRAT
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/522ecf8b-ae1e-411d-b61c-be5c29a773a9
Result
Threat name:
Njrat, XWorm
Create hunting rule
Detection:
malicious
Classification:
spre.phis.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1701128
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Connects to a pastebin service (likely for C&C)
Contains functionality to compare user and computer (likely to detect sandboxes)
Contains functionality to inject code into remote processes
Contains functionality to log keystrokes (.Net Source)
Contains functionality to spread to USB devices (.Net source)
Creates a thread in another existing process (thread injection)
Disables zone checking for all users
Found direct / indirect Syscall (likely to bypass EDR)
Found malware configuration
Hooks files or directories query functions (used to hide files and directories)
Hooks processes query functions (used to hide processes)
Hooks registry keys query functions (used to hide registry keys)
Injects a PE file into a foreign processes
Installs new ROOT certificates
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Modifies the prolog of user mode functions (user mode inline hooks)
Modifies the windows firewall
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Opens the same file many times (likely Sandbox evasion)
Sample uses string decryption to hide its real strings
Uses netsh to modify the Windows network and firewall settings
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected Njrat
Yara detected XWorm
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1701128 Sample: Runtime Broker.scr.exe Startdate: 28/05/2025 Architecture: WINDOWS Score: 100 55 rentry.co 2->55 57 abol8b-27708.portmap.io 2->57 59 9 other IPs or domains 2->59 65 Found malware configuration 2->65 67 Malicious sample detected (through community Yara rule) 2->67 69 Antivirus / Scanner detection for submitted sample 2->69 73 18 other signatures 2->73 8 Runtime Broker.scr.exe 22 4 2->8         started        13 Runtime Broker.scr.exe 4 5 2->13         started        signatures3 71 Connects to a pastebin service (likely for C&C) 55->71 process4 dnsIp5 61 rentry.co 104.26.2.16, 443, 49693 CLOUDFLARENETUS United States 8->61 63 i.ibb.co 108.181.22.211, 443, 49692, 49694 ASN852CA Canada 8->63 49 C:\Users\user\AppData\...\dtp45qiy.5cj.exe, PE32+ 8->49 dropped 75 Disables zone checking for all users 8->75 77 Opens the same file many times (likely Sandbox evasion) 8->77 15 dtp45qiy.5cj.exe 1 8->15         started        18 schtasks.exe 1 8->18         started        20 schtasks.exe 1 8->20         started        22 netsh.exe 8->22         started        51 C:\Users\user\AppData\...\5q03bcbn.kbq.exe, PE32+ 13->51 dropped 53 C:\Users\user\...\Runtime Broker.scr.exe.log, CSV 13->53 dropped 24 5q03bcbn.kbq.exe 13->24         started        26 schtasks.exe 13->26         started        28 schtasks.exe 13->28         started        file6 signatures7 process8 signatures9 83 Antivirus detection for dropped file 15->83 85 Multi AV Scanner detection for dropped file 15->85 87 Contains functionality to inject code into remote processes 15->87 95 3 other signatures 15->95 30 lsass.exe 6 15->30 injected 33 winlogon.exe 15->33 injected 45 2 other processes 15->45 35 conhost.exe 18->35         started        37 conhost.exe 20->37         started        39 conhost.exe 22->39         started        89 Writes to foreign memory regions 24->89 91 Allocates memory in foreign processes 24->91 93 Creates a thread in another existing process (thread injection) 24->93 47 6 other processes 24->47 41 conhost.exe 26->41         started        43 conhost.exe 28->43         started        process10 signatures11 79 Installs new ROOT certificates 30->79 81 Writes to foreign memory regions 30->81
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/88bf0db97f3bf88a4b7f0aaff64cc4065cb5da6c140008e6cb22316da47428bb
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/88bf0db97f3bf88a4b7f0aaff64cc4065cb5da6c140008e6cb22316da47428bb/
Threat name:
ByteCode-MSIL.Backdoor.njRAT
Create hunting rule
Status:
Malicious
First seen:
2025-05-27 12:30:00 UTC
File Type:
PE (.Net Exe)
Extracted files:
9
AV detection:
23 of 24 (95.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=rc7q3ol7hp4ius37bkx7mtgeazollwtmcqaarzwleiyw3jdufc5q._file
Verdict:
malicious
Label(s):
njrat
Create hunting rule
r77
Create hunting rule
Similar samples:
error
njrat
Result
Malware family:
xworm
Create hunting rule
Score:
  10/10
Tags:
family:xworm bootkit defense_evasion discovery persistence privilege_escalation rat trojan
Link:
https://tria.ge/reports/250528-1dw7bstmt7/
Behaviour
Checks SCSI registry key(s)
Checks processor information in registry
Enumerates system info in registry
Modifies data under HKEY_USERS
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: LoadsDriver
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Enumerates physical storage devices
Event Triggered Execution: Netsh Helper DLL
System Time Discovery
Drops file in Windows directory
Drops file in System32 directory
Enumerates connected drives
Writes to the Master Boot Record (MBR)
Checks BIOS information in registry
Checks computer location settings
Executes dropped EXE
Indicator Removal: Clear Windows Event Logs
Modifies Windows Firewall
Detect Xworm Payload
Suspicious use of NtCreateProcessExOtherParentProcess
Suspicious use of NtCreateUserProcessOtherParentProcess
Xworm
Xworm family
Verdict:
Malicious
Tags:
rootkit rat njrat trojan Win.Malware.Lazy-10008179-0
YARA:
Windows_Rootkit_R77_Be403E3C Windows_Rootkit_R77_d0367e28 JPCERTCC_Njrat MAL_Njrat Windows_Trojan_Njrat_30f3c220 malware_Njrat_strings MALWARE_Win_R77
Link:
https://app.threat.zone/submission/0ccdc631-65ba-48e8-828a-780ae5b18aa3
Unpacked files
SH256 hash:
88bf0db97f3bf88a4b7f0aaff64cc4065cb5da6c140008e6cb22316da47428bb
MD5 hash:
b0d3794c8e0344c2ea7a975cfd838a53
SHA1 hash:
c2584b38119ed749714178ed3fa8f5b4e98ec350
Detections:
win_njrat_g1
Create hunting rule
win_njrat_w1
Create hunting rule
NjRat
Create hunting rule
Link:
https://www.unpac.me/results/dcdef1f4-05be-4a44-b1a0-77cf6fe9a70a/
SH256 hash:
879cc20b41635709bb304e315aaa5ca4708b480a1bfc2f4935fcf2215188efb0
MD5 hash:
94f1ab3a068f83b32639579ec9c5d025
SHA1 hash:
38f3d5bc5de46feb8de093d11329766b8e2054ae
Detections:
MALWARE_Win_R77
Create hunting rule
Link:
https://www.unpac.me/results/dcdef1f4-05be-4a44-b1a0-77cf6fe9a70a/
Parent samples :
3db6003aed5663530344f627592d7071efcece6ab608d114cd219d5b19f389a5
9d08e5e62b409ef1ccd05c7996eb5432e4a36f55642cb7441d153909e823f144
2aa37e753ce1273f6ee4968bec7e2381b79a85ffbd1ee3da1fe9b4c1ea3ec4cd
88bf0db97f3bf88a4b7f0aaff64cc4065cb5da6c140008e6cb22316da47428bb
e6b8af13a9832030a6e769db896510df174c3450cc1ea9beffd59d052204e6c4
2f0ff1a3573cb45775b709b1e8df418ff7adcc5b678a52a768d02933b6174ca6
SH256 hash:
ecac0c91d0825919494b420be0b3f8b8e75dd96bb59cc9fc6504fdd332ffb700
MD5 hash:
f09042a3ba866f4f7062b23e70e0f5eb
SHA1 hash:
bcb3e863b07e1bd68f7c84305ff789610ce52cdb
Detections:
MALWARE_Win_R77
Create hunting rule
Link:
https://www.unpac.me/results/dcdef1f4-05be-4a44-b1a0-77cf6fe9a70a/
Parent samples :
ade5c6fc5f35fa02723f1c302d019419a7bc0d9234a4291040846c7e3515eb78
3db6003aed5663530344f627592d7071efcece6ab608d114cd219d5b19f389a5
9d08e5e62b409ef1ccd05c7996eb5432e4a36f55642cb7441d153909e823f144
2aa37e753ce1273f6ee4968bec7e2381b79a85ffbd1ee3da1fe9b4c1ea3ec4cd
88bf0db97f3bf88a4b7f0aaff64cc4065cb5da6c140008e6cb22316da47428bb
e6b8af13a9832030a6e769db896510df174c3450cc1ea9beffd59d052204e6c4
2f0ff1a3573cb45775b709b1e8df418ff7adcc5b678a52a768d02933b6174ca6
SH256 hash:
ed0f36469284416c812ed7c022454ccf2247e5438777cce6e10f5c837685a473
MD5 hash:
0b7a16fc893565085f2e76ff4bf246a6
SHA1 hash:
41a1a23193797fb5ddb6917fd1b671f7cac8a5c4
Detections:
win_njrat_g1
Create hunting rule
win_njrat_w1
Create hunting rule
NjRat
Create hunting rule
Njrat
Create hunting rule
CN_disclosed_20180208_c
Create hunting rule
Link:
https://www.unpac.me/results/dcdef1f4-05be-4a44-b1a0-77cf6fe9a70a/
Malware family:
XWorm
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/88bf0db97f3b/report/overview.html
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/88bf0db97f3bf88a4b7f0aaff64cc4065cb5da6c140008e6cb22316da47428bb

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:AutoIT_Compiled
Create hunting rule
Author:@bartblaze
Description:Identifies compiled AutoIT script (as EXE). This rule by itself does NOT necessarily mean the detected file is malicious.
Rule name:cobalt_strike_tmp01925d3f
Create hunting rule
Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__MemoryWorkingSet
Create hunting rule
Author:Fernando Mercês
Description:Anti-debug process memory working set size check
Reference:http://www.gironsec.com/blog/2015/06/anti-debugger-trick-quicky/
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerException__SetConsoleCtrl
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Disable_Defender
Create hunting rule
Author:iam-py-test
Description:Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:malware_Njrat_strings
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect njRAT in memory
Rule name:MALWARE_Win_R77
Create hunting rule
Author:ditekSHen
Description:Detects r77 rootkit
Rule name:MAL_njrat
Create hunting rule
Author:SECUINFRA Falcon Team
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:Njrat
Create hunting rule
Author:botherder https://github.com/botherder
Description:Njrat
Rule name:Njrat
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect njRAT in memory
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:pe_imphash
Create hunting rule
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:Skystars_LightDefender_Njrat_Rule
Create hunting rule
Author:Skystars LightDefender
Description:Detects Njrat
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Windows_Rootkit_R77_be403e3c
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/elastic-security-labs-steps-through-the-r77-rootkit
Rule name:Windows_Rootkit_R77_d0367e28
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/elastic-security-labs-steps-through-the-r77-rootkit
Rule name:Windows_Trojan_Njrat_30f3c220
Create hunting rule
Rule name:Windows_Trojan_Njrat_30f3c220
Create hunting rule
Author:Elastic Security
Rule name:win_njrat_w1
Create hunting rule
Author:Brian Wallace @botnet_hunter <bwall@ballastsecurity.net>
Description:Identify njRat

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/6099/

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (GUARD_CF)high
CHECK_TRUST_INFORequires Elevated Execution (level:requireAdministrator)high

Comments