MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 777cbd6c38b0f27455027204ceab65df304e230bd8849267e6164c0f99a443a7. 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: 11


Intelligence 11 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 777cbd6c38b0f27455027204ceab65df304e230bd8849267e6164c0f99a443a7
SHA3-384 hash: aa6a5dd38c9e99a93bebc72710e4b32bcc797d9c6fb8b2707ee0a9016cca00d7bc197d2e603f61cbe5e20fe630521f03
SHA1 hash: b3c9d843a623566fd57449995c7080c6f4bb7e70
MD5 hash: bbbb4cb7f58fdd52a72b86a6653dbc28
humanhash: steak-zebra-zulu-jig
File name:Gfrzkndk.exe
Download: download sample
Signature ResolverRAT
Create hunting rule
File size:3'635'200 bytes
First seen:2025-05-28 13:41:59 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:sbgefOVQq8rcB6Ml326KdixtqLOz3WN87Q410tNU:4IDSO6S3tZtOOz3WN87Q410t+
TLSH T162F5333C239ACA11C7F976FE98F182415F3C409A5B13F74C6ABAD1B48D5B3E1486A487
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 :
394
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
VoicemodCrackSetup.exe
Verdict:
Malicious activity
Analysis date:
2025-05-28 13:26:06 UTC
Tags:
loader python pyinstaller inno installer delphi auto-reg
Link:
https://app.any.run/tasks/1732c92d-d5e3-4cd9-98d7-147ee3308b78

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/6025/
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68371364acf88f5815e7f7c7
Tags:
virus micro msil
Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Creating a file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
base64 obfuscated packed packed packer_detected
Link:
https://www.filescan.io/uploads/683712bf985349514e5e454a/reports/545b2ec6-a1fd-476e-a12b-cbb8144d1e0e/overview
Verdict:
Malicious
Labled as:
IL:Trojan.MSILZilla
Link:
https://www.hybrid-analysis.com/sample/777cbd6c38b0f27455027204ceab65df304e230bd8849267e6164c0f99a443a7
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/77283f0e-2f1f-4f16-ac5d-b1055f510514
Result
Threat name:
ResolverRAT
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1700738
Signature
.NET source code contains potential unpacker
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
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
Yara Genericmalware
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1700738 Sample: Gfrzkndk.exe Startdate: 28/05/2025 Architecture: WINDOWS Score: 100 103 Multi AV Scanner detection for submitted file 2->103 105 Yara detected ResolverRAT 2->105 107 Yara detected AntiVM3 2->107 109 12 other signatures 2->109 9 Gfrzkndk.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 119 Drops VBS files to the startup folder 9->119 121 Encrypted powershell cmdline option found 9->121 123 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 9->123 127 5 other signatures 9->127 15 InstallUtil.exe 4 9->15         started        19 powershell.exe 23 9->19         started        21 cmd.exe 1 9->21         started        23 cmd.exe 1 9->23         started        125 Windows Scripting host queries suspicious COM object (likely to drop second stage) 13->125 25 svchost.exe 13->25         started        signatures5 process6 dnsIp7 75 45.135.232.136, 49723, 49748, 49749 ASBAXETNRU Russian Federation 15->75 83 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 15->83 85 Tries to steal Mail credentials (via file / registry access) 15->85 87 Tries to harvest and steal Bitcoin Wallet information 15->87 101 2 other signatures 15->101 27 chrome.exe 1 15->27         started        41 7 other processes 15->41 89 Loading BitLocker PowerShell Module 19->89 30 WmiPrvSE.exe 19->30         started        32 conhost.exe 19->32         started        91 Uses ipconfig to lookup or modify the Windows network settings 21->91 43 2 other processes 21->43 45 2 other processes 23->45 93 Multi AV Scanner detection for dropped file 25->93 95 Writes to foreign memory regions 25->95 97 Injects a PE file into a foreign processes 25->97 99 Uses threadpools to delay analysis 25->99 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, 49711 unknown unknown 27->69 47 chrome.exe 27->47         started        111 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 34->111 113 Tries to steal Mail credentials (via file / registry access) 34->113 115 Tries to harvest and steal browser information (history, passwords, etc) 34->115 117 2 other signatures 34->117 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 77 googlehosted.l.googleusercontent.com 142.250.101.132, 443, 49739, 49740 GOOGLEUS United States 47->77 79 www.google.com 74.125.137.147, 443, 49729, 49730 GOOGLEUS United States 47->79 81 clients2.googleusercontent.com 47->81 60 chrome.exe 50->60         started        process14 dnsIp15 71 142.250.217.132, 443, 49755, 49756 GOOGLEUS United States 60->71 73 www.google.com 60->73
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/777cbd6c38b0f27455027204ceab65df304e230bd8849267e6164c0f99a443a7
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/777cbd6c38b0f27455027204ceab65df304e230bd8849267e6164c0f99a443a7/
Threat name:
ByteCode-MSIL.Trojan.Mardom
Create hunting rule
Status:
Malicious
First seen:
2025-05-24 15:03:03 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
28 of 36 (77.78%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=o56l23bywdzhivicoicm5k3f34ye4iyl3ccjez7gczga7gneiotq._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
collection discovery
Link:
https://tria.ge/reports/250528-qzs2pawqw7/
Behaviour
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
Drops file in Windows directory
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/11dfd9d5-cdd2-4418-b101-b2d713e98c35
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/777cbd6c38b0f27455027204ceab65df304e230bd8849267e6164c0f99a443a7

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:NETexecutableMicrosoft
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 777cbd6c38b0f27455027204ceab65df304e230bd8849267e6164c0f99a443a7

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3554621/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/6025/

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