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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 397a21465c3a7489bf6b5322732e174cd31874de18dec638d3ebc5bda0362004. 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: 18


Intelligence 18 IOCs YARA 8 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 397a21465c3a7489bf6b5322732e174cd31874de18dec638d3ebc5bda0362004
SHA3-384 hash: b090feb1f079f9e9fd32382fa1bef222f071616ea9bb5e7d1228754a7474842f9fa04916dc88358dc3523418c7c2c6cc
SHA1 hash: 27e28e25ed6a00e4ec99d66e5bcde0d2540ddb51
MD5 hash: d54171877c4b074be61b6c46a9c52f90
humanhash: salami-oklahoma-happy-west
File name:QUOTATION_IBF Groups PO-20260518048166 E2S A105N.pdf(783KB).com
Download: download sample
Signature njrat
Create hunting rule
File size:929'280 bytes
First seen:2026-05-19 06:28:52 UTC
Last seen:2026-06-08 09:52:34 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (49'245 x AgentTesla, 20'500 x Formbook, 12'374 x SnakeKeylogger)
ssdeep 24576:h9YTXa5EwAhFw5b4drmy+yGl5h17F7lyM+t5+uGg:/p4dyB1psfj+
Threatray 288 similar samples on MalwareBazaar
TLSH T1781512BDB2D05F01D2A42979D5EB812403E76A97B633E38E3E5456E61D02360CE5B3CB
TrID 70.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
6.2% (.EXE) Win64 Executable (generic) (6522/11/2)
4.8% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
Reporter lowmal3
Tags:exe NjRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
229
Origin country :
DE DE
Vendor Threat Intelligence
Malware configuration found for:
NETReactor
Details
NETReactor
decrypted strings
Link:
https://research.acce.ciphertechsolutions.com/results/3597e49c-274e-4124-9c49-d50941f0a6e0/
Malware family:
n/a
ID:
1
File name:
_397a21465c3a7489bf6b5322732e174cd31874de18dec638d3ebc5bda0362004.exe
Verdict:
Suspicious activity
Analysis date:
2026-05-19 06:33:31 UTC
Tags:
netreactor auto-reg auto-startup
Link:
https://app.any.run/tasks/152d9324-54b0-4bda-8b40-441d5a567bd3

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
XWorm
Create hunting rule
Link:
https://www.capesandbox.com/analysis/66390/
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a0c03469492784948345a37
Tags:
autorun spawn virus
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Сreating synchronization primitives
Creating a file in the %AppData% subdirectories
Enabling the 'hidden' option for recently created files
Connection attempt to an infection source
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Creating a file in the mass storage device
Query of malicious DNS domain
Enabling autorun by creating a file
Enabling threat expansion on mass storage devices
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
base64 masquerade net_reactor obfuscated obfuscated packed packed
Link:
https://www.filescan.io/uploads/6a0c033d861ee596e63cfdb6/reports/388b9c1d-710f-488c-b04d-1eac20b89888/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/397a21465c3a7489bf6b5322732e174cd31874de18dec638d3ebc5bda0362004
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-05-17T20:42:00Z UTC
Last seen:
2026-05-21T04:39:00Z UTC
Hits:
~1000
Detections:
PDM:Worm.Win32.Generic PDM:Trojan.Win32.Generic Trojan.WinLNK.Agent.fb Trojan.Win32.Agent.sb Trojan.MSIL.Crypt.sb Backdoor.MSIL.XWorm.b VHO:Trojan.Win32.Sdum.gen Backdoor.Agent.TCP.C&C Trojan.MSIL.Inject.sb Trojan.MSIL.Agent.sb Trojan-Dropper.Win32.Injector.sb HEUR:Backdoor.MSIL.Androm.gen Backdoor.Win32.Androm.sb
Link:
https://opentip.kaspersky.com/397a21465c3a7489bf6b5322732e174cd31874de18dec638d3ebc5bda0362004/results?tab=lookup
Malware family:
Malicious Packer
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/87550dcc-ce25-4fc8-ac1f-e198361d3552
Result
Threat name:
XWorm
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1915421
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Connects to many ports of the same IP (likely port scanning)
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Creates autostart registry keys with suspicious values (likely registry only malware)
Found malware configuration
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
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)
Sample uses string decryption to hide its real strings
Suricata IDS alerts for network traffic
Yara detected AntiVM3
Yara detected MSIL Injector
Yara detected UAC Bypass using CMSTP
Yara detected XWorm
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1915421 Sample: QUOTATION_IBF Groups  PO-20... Startdate: 19/05/2026 Architecture: WINDOWS Score: 100 34 wqo9.firewall-gateway.de 2->34 36 keyauth.win 2->36 38 code1.ydns.eu 2->38 46 Suricata IDS alerts for network traffic 2->46 48 Found malware configuration 2->48 50 Antivirus detection for URL or domain 2->50 52 15 other signatures 2->52 7 QUOTATION_IBF Groups  PO-20260518048166  E2S A105N.pdf(783KB).com.exe 3 2->7         started        11 VersionUpdate.exe 3 2->11         started        13 VersionUpdate.exe 2 2->13         started        signatures3 process4 file5 32 QUOTATION_IBF Grou...(783KB).com.exe.log, ASCII 7->32 dropped 54 Injects a PE file into a foreign processes 7->54 15 QUOTATION_IBF Groups  PO-20260518048166  E2S A105N.pdf(783KB).com.exe 2 7 7->15         started        20 svchost.exe 7->20         started        22 QUOTATION_IBF Groups  PO-20260518048166  E2S A105N.pdf(783KB).com.exe 7->22         started        56 Multi AV Scanner detection for dropped file 11->56 24 VersionUpdate.exe 11->24         started        26 VersionUpdate.exe 13->26         started        28 VersionUpdate.exe 13->28         started        signatures6 process7 dnsIp8 40 wqo9.firewall-gateway.de 64.89.162.10, 49697, 49701, 59013 DIXIE-NETUS United States 15->40 42 code1.ydns.eu 128.0.1.9, 59013 M247GB Romania 15->42 30 C:\Users\user\AppData\...\VersionUpdate.exe, PE32 15->30 dropped 44 Creates autostart registry keys with suspicious values (likely registry only malware) 15->44 file9 signatures10
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/397a21465c3a7489bf6b5322732e174cd31874de18dec638d3ebc5bda0362004
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/397a21465c3a7489bf6b5322732e174cd31874de18dec638d3ebc5bda0362004/
Verdict:
Malicious
Threat:
VHO:Trojan.Win32.Sdum
Link:
https://tip.neiki.dev/file/397a21465c3a7489bf6b5322732e174cd31874de18dec638d3ebc5bda0362004
Threat name:
Win32.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2026-05-18 00:03:32 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
22 of 36 (61.11%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=hf5ccrs4hj2itp3lkmrhglqxjtjrq5g6ddpmmogt5pc33ibweaca._file
Verdict:
malicious
Label(s):
xworm
Create hunting rule
Similar samples:
22e20c87b8a58256ba2d789c04fa52c109cd991dd82f270e4c4da5b72f057b77
njrat
397a21465c3a7489bf6b5322732e174cd31874de18dec638d3ebc5bda0362004
njrat
71298dc679ea1a7f863c3c645f008e5ffcf892510bafc1c1fd201fcbf5f41952
njrat
9284545d6d4a27ef2314218c18aafb6c77ecbf7be2f79333f238b40314d238f9
njrat
b5de998bef87cfaf1392cd8157e266111e9e4315527a670680e8158149e72088
njrat
e6bb646f56c9c4807ee6aa5d50101b0bc1240f748e6c9c12a3f673f2f828d10f
njrat
e6faf4b04b4af47427346ee41caa3aeb95b7e864458d570ba5111d73cbc70f1c
njrat
error
njrat
+ 278 additional samples on MalwareBazaar
Result
Malware family:
xworm
Create hunting rule
Score:
  10/10
Tags:
family:xworm discovery persistence rat trojan
Link:
https://tria.ge/reports/260519-g9ahnagx2t/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Adds Run key to start application
Drops startup file
Executes dropped EXE
Detect Xworm Payload
Family: Xworm
Unpacked files
SH256 hash:
397a21465c3a7489bf6b5322732e174cd31874de18dec638d3ebc5bda0362004
MD5 hash:
d54171877c4b074be61b6c46a9c52f90
SHA1 hash:
27e28e25ed6a00e4ec99d66e5bcde0d2540ddb51
Link:
https://www.unpac.me/results/87284a61-8885-425f-a41e-a8c2a78831df/
SH256 hash:
374e715e504c4b2c98db8f0542baf3b34fcef09ffe731a3bad3bbb2cf7fb125f
MD5 hash:
1617e4cf4835d9a48ae445d685165cc6
SHA1 hash:
200766e3a6182708fd011c79839b8ebed9b75356
Link:
https://www.unpac.me/results/87284a61-8885-425f-a41e-a8c2a78831df/
SH256 hash:
363ee51fc02f20cb206039434758c3afa1c71bc7d316c6db4a39b0d310ab92f9
MD5 hash:
afe085b7324d72673eef749ff5f21a49
SHA1 hash:
a86f1039a8877804b1b2c99aed91312846cd40e5
Link:
https://www.unpac.me/results/87284a61-8885-425f-a41e-a8c2a78831df/
SH256 hash:
8995d7eca4de6c7c0c1a761c877e4e7c80de63bd361c8aaee1bbd66fd4c9dfc3
MD5 hash:
a5543a26919050e9c0313e29b9fc43c2
SHA1 hash:
aa89566831accff7db683d0e1abdfd9265433a2f
Link:
https://www.unpac.me/results/87284a61-8885-425f-a41e-a8c2a78831df/
SH256 hash:
e9480bbb7cbbba6eb46a692d0135d8a0135e10fa7be9c69ed3423014a864594f
MD5 hash:
b957cb720ad28ba2d52026544559b3cc
SHA1 hash:
b5ca599cad2d1e85316c20a8a0621da72a455507
Link:
https://www.unpac.me/results/87284a61-8885-425f-a41e-a8c2a78831df/
SH256 hash:
397a21465c3a7489bf6b5322732e174cd31874de18dec638d3ebc5bda0362004
MD5 hash:
d54171877c4b074be61b6c46a9c52f90
SHA1 hash:
27e28e25ed6a00e4ec99d66e5bcde0d2540ddb51
Link:
https://www.unpac.me/results/87284a61-8885-425f-a41e-a8c2a78831df/
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/397a21465c3a7489bf6b5322732e174cd31874de18dec638d3ebc5bda0362004

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:DotNet_Reactor
Create hunting rule
Author:@bartblaze
Description:Identifies .NET Reactor, which offers .NET code protection such as obfuscation, encryption and so on.
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:PureCrypter
Create hunting rule
Author:@bartblaze
Description:Identifies PureCrypter, .NET loader and obfuscator.
Reference:https://malpedia.caad.fkie.fraunhofer.de/details/win.purecrypter
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_CMD_Powershell_Usage
Create hunting rule
Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)
Rule name:VECT_Ransomware
Create hunting rule
Author:Mustafa Bakhit
Description:Detects activity associated with VECT ransomware. This includes registry modifications and deletions, execution of system and defense-evasion commands, suspicious API usage, mutex creation, file and memory manipulation, ransomware note generation, anti-debugging and anti-analysis techniques, and embedded cryptographic constants (SHA256) characteristic of this malware family. Designed for threat intelligence and malware detection environments.

File information

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

Malspam

njrat

Executable exe 397a21465c3a7489bf6b5322732e174cd31874de18dec638d3ebc5bda0362004

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/66390/

Comments