MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4bdeed6e8444b6faabac6f85c45eac791ee8fa13d499b32bb278bddd2d61fe12. 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


ResolverRAT


Vendor detections: 10


Intelligence 10 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4bdeed6e8444b6faabac6f85c45eac791ee8fa13d499b32bb278bddd2d61fe12
SHA3-384 hash: 861a6cdd9ef9e80001a5aa8b4641045c8da1e1e503c4b25c92f17b7d9118bda49d09cda6bd5282bbb80824c22d6aaa50
SHA1 hash: d9df0a929d5f5c17a9cd679adc2b26cd414d3f5b
MD5 hash: b8169f19f43644284953a5a281f7c27f
humanhash: nevada-ohio-skylark-artist
File name:Nkrpno.exe
Download: download sample
Signature ResolverRAT
Create hunting rule
File size:3'634'176 bytes
First seen:2025-05-28 13:42:46 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'741 x AgentTesla, 19'606 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 98304:1hBMn6YygxbJyKPXNlcLqinfOxmf93kwS+RRwspAJ+KG:Xqn6abJyC9anOm9ULsyo
TLSH T13CF5331D68CD2D1BCAED2EFDB4B2B410177C2044A3A7F38A95B581FAE8273554D0F986
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10522/11/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika pebin
Reporter burger
Tags:exe ResolverRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
405
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Nkrpno.exe
Verdict:
Malicious activity
Analysis date:
2025-05-28 13:44:11 UTC
Tags:
purecrypter netreactor stealer auto-startup
Link:
https://app.any.run/tasks/71d4fa43-3328-407d-b87c-4018e0520e6a

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/6029/
Verdict:
Clean
Score:
84.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=683714c1acf88f5815e7f900
Tags:
n/a
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
base64 obfuscated packed packed packer_detected
Link:
https://www.filescan.io/uploads/68371305171e01f9592f8930/reports/2ce64bef-a7db-4088-9047-7d659313e018/overview
Verdict:
Malicious
Labled as:
IL:Trojan.MSILZilla
Link:
https://www.hybrid-analysis.com/sample/4bdeed6e8444b6faabac6f85c45eac791ee8fa13d499b32bb278bddd2d61fe12
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/70b8e837-382a-4f5f-9bfc-1d314ddc1d15
Result
Threat name:
ResolverRAT
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1700746
Signature
.NET source code contains potential unpacker
Creates a thread in another existing process (thread injection)
Drops PE files with benign system names
Drops VBS files to the startup folder
Encrypted powershell cmdline option found
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Drops script at startup location
Sigma detected: Files With System Process Name In Unsuspected Locations
Sigma detected: Invoke-Obfuscation CLIP+ Launcher
Sigma detected: Invoke-Obfuscation VAR+ Launcher
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Rare Remote Thread Creation By Uncommon Source Image
Sigma detected: System File Execution Location Anomaly
Sigma detected: WScript or CScript Dropper
Switches to a custom stack to bypass stack traces
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal Bitcoin Wallet information
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Uses ipconfig to lookup or modify the Windows network settings
Uses threadpools to delay analysis
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected Costura Assembly Loader
Yara detected ResolverRAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1700746 Sample: Nkrpno.exe Startdate: 28/05/2025 Architecture: WINDOWS Score: 100 105 Multi AV Scanner detection for submitted file 2->105 107 Yara detected ResolverRAT 2->107 109 Yara detected AntiVM3 2->109 111 11 other signatures 2->111 9 Nkrpno.exe 6 2->9         started        13 wscript.exe 2->13         started        process3 file4 63 C:\Users\user\AppData\Roaming\svchost.exe, PE32 9->63 dropped 65 C:\Users\user\...\svchost.exe:Zone.Identifier, ASCII 9->65 dropped 67 C:\Users\user\AppData\Roaming\...\svchost.vbs, ASCII 9->67 dropped 121 Drops VBS files to the startup folder 9->121 123 Encrypted powershell cmdline option found 9->123 125 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 9->125 129 4 other signatures 9->129 15 InstallUtil.exe 4 9->15         started        19 powershell.exe 21 9->19         started        21 cmd.exe 1 9->21         started        23 cmd.exe 1 9->23         started        127 Windows Scripting host queries suspicious COM object (likely to drop second stage) 13->127 25 svchost.exe 13->25         started        signatures5 process6 dnsIp7 77 45.135.232.136, 49720, 49746, 49747 ASBAXETNRU Russian Federation 15->77 85 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 15->85 87 Tries to steal Mail credentials (via file / registry access) 15->87 89 Tries to harvest and steal Bitcoin Wallet information 15->89 103 2 other signatures 15->103 27 chrome.exe 15->27         started        41 7 other processes 15->41 91 Loading BitLocker PowerShell Module 19->91 30 WmiPrvSE.exe 19->30         started        32 conhost.exe 19->32         started        93 Uses ipconfig to lookup or modify the Windows network settings 21->93 43 2 other processes 21->43 45 2 other processes 23->45 95 Multi AV Scanner detection for dropped file 25->95 97 Writes to foreign memory regions 25->97 99 Injects a PE file into a foreign processes 25->99 101 Uses threadpools to delay analysis 25->101 34 InstallUtil.exe 25->34         started        37 cmd.exe 25->37         started        39 cmd.exe 25->39         started        signatures8 process9 dnsIp10 69 192.168.2.4, 138, 443, 49456 unknown unknown 27->69 47 chrome.exe 27->47         started        113 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 34->113 115 Tries to steal Mail credentials (via file / registry access) 34->115 117 Tries to harvest and steal browser information (history, passwords, etc) 34->117 119 4 other signatures 34->119 50 chrome.exe 34->50         started        52 conhost.exe 37->52         started        54 ipconfig.exe 37->54         started        56 conhost.exe 39->56         started        58 ipconfig.exe 39->58         started        signatures11 process12 dnsIp13 79 googlehosted.l.googleusercontent.com 142.250.72.129, 443, 49736 GOOGLEUS United States 47->79 81 www.google.com 74.125.137.104, 443, 49724, 49727 GOOGLEUS United States 47->81 83 clients2.googleusercontent.com 47->83 60 chrome.exe 50->60         started        process14 dnsIp15 71 142.250.68.4, 443, 49754, 49755 GOOGLEUS United States 60->71 73 172.217.12.129, 443, 49764 GOOGLEUS United States 60->73 75 3 other IPs or domains 60->75
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4bdeed6e8444b6faabac6f85c45eac791ee8fa13d499b32bb278bddd2d61fe12
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4bdeed6e8444b6faabac6f85c45eac791ee8fa13d499b32bb278bddd2d61fe12/
Threat name:
ByteCode-MSIL.Trojan.Mardom
Create hunting rule
Status:
Malicious
First seen:
2025-05-28 13:43:33 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jppo23ueis3pvk5mn6c4ixvmpepor6qt2sm3gk5spc652llb7yja._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
collection discovery
Link:
https://tria.ge/reports/250528-q1fsragl9s/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Gathers network information
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
outlook_office_path
outlook_win_path
Browser Information Discovery
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Accesses Microsoft Outlook profiles
Checks computer location settings
Drops startup file
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/c1b6453a-28ca-46a2-8903-97a43c059d81
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.51
Link:
https://yomi.yoroi.company/submissions/4bdeed6e8444b6faabac6f85c45eac791ee8fa13d499b32bb278bddd2d61fe12

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:NET
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
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)

File information

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

Web download

ResolverRAT

Executable exe 4bdeed6e8444b6faabac6f85c45eac791ee8fa13d499b32bb278bddd2d61fe12

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3554624/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/6029/

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

Comments