MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 66bc91399d2182893517c0d7aecdcabb23925c6b01ee0bd73c957ac4a2b46760. 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


RemcosRAT


Vendor detections: 15


Intelligence 15 IOCs YARA 24 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 66bc91399d2182893517c0d7aecdcabb23925c6b01ee0bd73c957ac4a2b46760
SHA3-384 hash: 420399da34d3c54ebaa7f129a213f6a03c20f6913c243e8f085a24b9eb3545c93cb8e5afb87a532b28a4603a49a5a8ff
SHA1 hash: 247e9f85126cbe4e93185f83a43b64d0646a2f1e
MD5 hash: 76948a3d73d218b995de64206b580c07
humanhash: sierra-coffee-quebec-apart
File name:SecuriteInfo.com.Variant.Zusy.591475.496.2268
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'725'952 bytes
First seen:2025-05-24 17:01:22 UTC
Last seen:2025-05-24 17:40:39 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 24835644d43a9045316073dd0c94d143 (1 x RemcosRAT)
ssdeep 24576:yuG4sz3ln7HS7FTa4XVciJA0A0T2RXQBhF2JPRewHpOAraAFkZT8hB4Do9:yusYaUVcBq25OaewHl8T8/ok
TLSH T1E385BE20F5499737D71738748C1E92C9B8193EE11E25780AF5990F4C6A3D6A12E2F3BB
TrID 52.6% (.EXE) Win32 EXE PECompact compressed (generic) (41569/9/9)
17.9% (.EXE) Win32 Executable Delphi generic (14182/79/4)
13.3% (.EXE) Win64 Executable (generic) (10522/11/4)
5.7% (.EXE) Win32 Executable (generic) (4504/4/1)
2.6% (.EXE) Win16/32 Executable Delphi generic (2072/23)
Magika pebin
dhash icon f8f8d0f0c0d0c0c0 (9 x RemcosRAT, 6 x DBatLoader)
Reporter SecuriteInfoCom
Tags:exe RemcosRAT

Intelligence

File Origin
# of uploads :
4
# of downloads :
466
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
amadey
Create hunting rule
ID:
1
File name:
random.exe
Verdict:
Malicious activity
Analysis date:
2025-05-24 16:07:42 UTC
Tags:
amadey botnet stealer loader themida rdp telegram lumma auto-reg auto-sch evasion uac miner
Link:
https://app.any.run/tasks/faa88789-94d4-40b8-8ae9-a00c87e4b16d

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Variant.Zusy.591475.496.2268.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
97.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6831fd414912a6b9dd4cf05b
Tags:
autorun cobalt emotet
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the Windows subdirectories
DNS request
Sending an HTTP GET request
Changing a file
Reading critical registry keys
Сreating synchronization primitives
Creating a window
Creating a file
Running batch commands
Creating a process with a hidden window
Launching a process
Creating a process from a recently created file
Searching for the window
Connection attempt
Sending a custom TCP request
Creating a file in the %temp% subdirectories
Stealing user critical data
Forced shutdown of a system process
Enabling autorun by creating a file
Unauthorized injection to a system process
Adding an exclusion to Microsoft Defender
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
adaptive-context borland_delphi fingerprint keylogger packed packed packer_detected
Link:
https://www.filescan.io/uploads/6831fb9d171e01f9592c4ef2/reports/01839260-58ba-4b52-a455-dbb59f2db0ef/overview
Verdict:
Malicious
Labled as:
Zusy.Generic
Link:
https://www.hybrid-analysis.com/sample/66bc91399d2182893517c0d7aecdcabb23925c6b01ee0bd73c957ac4a2b46760
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/190a7a07-8556-4323-94df-6832f53b621f
Result
Threat name:
AsyncRAT, DBatLoader, Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1698544
Signature
Adds a directory exclusion to Windows Defender
Allocates many large memory junks
Allocates memory in foreign processes
Antivirus detection for dropped file
Antivirus detection for URL or domain
Attempt to bypass Chrome Application-Bound Encryption
C2 URLs / IPs found in malware configuration
Connects to a pastebin service (likely for C&C)
Contains functionality to bypass UAC (CMSTPLUA)
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Contains functionality to register a low level keyboard hook
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Contains functionalty to change the wallpaper
Creates a thread in another existing process (thread injection)
Creates autostart registry keys with suspicious values (likely registry only malware)
Drops PE files with a suspicious file extension
Found evasive API chain checking for user administrative privileges
Found hidden mapped module (file has been removed from disk)
Found malware configuration
Found stalling execution ending in API Sleep call
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sample uses string decryption to hide its real strings
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: DLL Search Order Hijackig Via Additional Space in Path
Sigma detected: Net WebClient Casing Anomalies
Sigma detected: New RUN Key Pointing to Suspicious Folder
Sigma detected: Potential Data Stealing Via Chromium Headless Debugging
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Rare Remote Thread Creation By Uncommon Source Image
Suricata IDS alerts for network traffic
Suspicious execution chain found
Suspicious powershell command line found
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file / registry access)
Uses ping.exe to check the status of other devices and networks
Uses ping.exe to sleep
Uses schtasks.exe or at.exe to add and modify task schedules
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Yara detected AntiVM3
Yara detected AsyncRAT
Yara detected DBatLoader
Yara detected Powershell decode and execute
Yara detected Powershell download and execute
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1698544 Sample: SecuriteInfo.com.Variant.Zu... Startdate: 24/05/2025 Architecture: WINDOWS Score: 100 80 paste.ee 2->80 82 leak-shop.cc 2->82 84 2 other IPs or domains 2->84 106 Suricata IDS alerts for network traffic 2->106 108 Found malware configuration 2->108 110 Malicious sample detected (through community Yara rule) 2->110 114 23 other signatures 2->114 9 SecuriteInfo.com.Variant.Zusy.591475.496.2268.exe 8 2->9         started        13 rundll32.exe 3 2->13         started        15 svchost.exe 2->15         started        signatures3 112 Connects to a pastebin service (likely for C&C) 80->112 process4 file5 70 C:\Users\user\Links\Splhwdim.PIF, PE32 9->70 dropped 142 Drops PE files with a suspicious file extension 9->142 144 Writes to foreign memory regions 9->144 146 Allocates memory in foreign processes 9->146 148 4 other signatures 9->148 17 SndVol.exe 8 28 9->17         started        22 cmd.exe 1 9->22         started        24 cmd.exe 1 9->24         started        26 cmd.exe 1 9->26         started        28 Splhwdim.PIF 13->28         started        30 powershell.exe 13->30         started        signatures6 process7 dnsIp8 72 leak-shop.cc 45.141.233.95, 49681, 49682, 49683 ASDETUKhttpwwwheficedcomGB Bulgaria 17->72 74 geoplugin.net 178.237.33.50, 49686, 80 ATOM86-ASATOM86NL Netherlands 17->74 62 C:\Users\user\AppData\Local\Temp\TH56BE.tmp, MS-DOS 17->62 dropped 64 C:\Users\user\AppData\Local\Temp\TH5621.tmp, MS-DOS 17->64 dropped 66 C:\Users\user\AppData\Local\Temp\TH55B3.tmp, PE32 17->66 dropped 68 3 other malicious files 17->68 dropped 116 Contains functionality to bypass UAC (CMSTPLUA) 17->116 118 Attempt to bypass Chrome Application-Bound Encryption 17->118 120 Contains functionalty to change the wallpaper 17->120 138 9 other signatures 17->138 32 wscript.exe 1 1 17->32         started        35 svchost.exe 17->35         started        37 svchost.exe 17->37         started        43 6 other processes 17->43 122 Uses ping.exe to sleep 22->122 124 Uses schtasks.exe or at.exe to add and modify task schedules 22->124 126 Uses ping.exe to check the status of other devices and networks 22->126 39 conhost.exe 22->39         started        45 2 other processes 24->45 48 2 other processes 26->48 128 Multi AV Scanner detection for dropped file 28->128 130 Writes to foreign memory regions 28->130 140 3 other signatures 28->140 41 colorcpl.exe 2 28->41         started        76 185.195.65.107, 49692, 80 XTGLOBALRO Romania 30->76 78 paste.ee 23.186.113.60, 443, 49694, 49695 KLAYER-GLOBALNL Reserved 30->78 132 Creates autostart registry keys with suspicious values (likely registry only malware) 30->132 134 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 30->134 136 Injects a PE file into a foreign processes 30->136 50 3 other processes 30->50 file9 signatures10 process11 dnsIp12 90 Suspicious powershell command line found 32->90 92 Wscript starts Powershell (via cmd or directly) 32->92 94 Windows Scripting host queries suspicious COM object (likely to drop second stage) 32->94 96 Suspicious execution chain found 32->96 98 Tries to steal Instant Messenger accounts or passwords 35->98 100 Tries to steal Mail credentials (via file / registry access) 35->100 102 Tries to harvest and steal browser information (history, passwords, etc) 37->102 104 Loading BitLocker PowerShell Module 43->104 52 conhost.exe 43->52         started        54 conhost.exe 43->54         started        56 WmiPrvSE.exe 43->56         started        58 msedge.exe 43->58         started        86 127.0.0.1 unknown unknown 45->86 88 196.251.73.254, 49700, 8507 Web4AfricaZA Seychelles 50->88 60 conhost.exe 50->60         started        signatures13 process14
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/66bc91399d2182893517c0d7aecdcabb23925c6b01ee0bd73c957ac4a2b46760
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/66bc91399d2182893517c0d7aecdcabb23925c6b01ee0bd73c957ac4a2b46760/
Threat name:
Win32.Trojan.Egairtigado
Create hunting rule
Status:
Malicious
First seen:
2025-05-24 16:54:21 UTC
File Type:
PE (Exe)
Extracted files:
40
AV detection:
20 of 24 (83.33%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=m26jcom5egbisnixydl25tokxmrzexdlahxaxvz4sv5mjivum5qa._file
Verdict:
malicious
Label(s):
dbatloader
Create hunting rule
Similar samples:
error
RemcosRAT
Result
Malware family:
modiloader
Create hunting rule
Score:
  10/10
Tags:
family:asyncrat family:modiloader botnet:new ego collection credential_access discovery execution persistence rat stealer trojan
Link:
https://tria.ge/reports/250524-vj7blagq7x/
Behaviour
Enumerates system info in registry
Modifies registry class
Runs ping.exe
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: JavaScript
Enumerates physical storage devices
System Location Discovery: System Language Discovery
System Network Configuration Discovery: Internet Connection Discovery
Drops file in Program Files directory
Drops file in System32 directory
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Adds Run key to start application
Checks computer location settings
Executes dropped EXE
Blocklisted process makes network request
Command and Scripting Interpreter: PowerShell
Uses browser remote debugging
Detected Nirsoft tools
ModiLoader Second Stage
NirSoft MailPassView
AsyncRat
Asyncrat family
ModiLoader, DBatLoader
Modiloader family
Malware Config
C2 Extraction:
leak-shop.cc:8085
leak-shop.cc:8507
196.251.73.254:8085
196.251.73.254:8507
Unpacked files
SH256 hash:
66bc91399d2182893517c0d7aecdcabb23925c6b01ee0bd73c957ac4a2b46760
MD5 hash:
76948a3d73d218b995de64206b580c07
SHA1 hash:
247e9f85126cbe4e93185f83a43b64d0646a2f1e
Link:
https://www.unpac.me/results/dc0e440c-859f-4cb2-9065-90db42114b52/
Malware family:
WebBrowserPassView
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/66bc91399d21/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/66bc91399d2182893517c0d7aecdcabb23925c6b01ee0bd73c957ac4a2b46760

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:Borland
Create hunting rule
Author:malware-lu
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__RemoteAPI
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerException__ConsoleCtrl
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
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:INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
Author:ditekSHen
Description:Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:Remcos_unpacked_PulseIntel
Create hunting rule
Author:PulseIntel
Description:Remcos Payload
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
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:Typical_Malware_String_Transforms
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects typical strings in a reversed or otherwise modified form
Reference:Internal Research
Rule name:Typical_Malware_String_Transforms_RID3473
Create hunting rule
Author:Florian Roth
Description:Detects typical strings in a reversed or otherwise modified form
Reference:Internal Research
Rule name:Windows_Generic_Threat_d7b57912
Create hunting rule
Author:Elastic Security
Rule name:Windows_Trojan_Remcos_b296e965
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/exploring-the-ref2731-intrusion-set
Rule name:win_remcos_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.remcos.
Rule name:win_remcos_rat_unpacked
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:win_remcos_w0
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:yarahub_win_remcos_rat_unpacked_aug_2023
Create hunting rule
Author:Matthew @ Embee_Research

File information

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

Web download

RemcosRAT

Executable exe 66bc91399d2182893517c0d7aecdcabb23925c6b01ee0bd73c957ac4a2b46760

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3551730/
  
Delivery method
Distributed via web download

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_NXMissing Non-Executable Memory Protectioncritical
CHECK_PIEMissing Position-Independent Executable (PIE) Protectionhigh
Reviews
IDCapabilitiesEvidence
AUTH_APIManipulates User Authorizationadvapi32.dll::ImpersonateNamedPipeClient
advapi32.dll::RevertToSelf
COM_BASE_APICan Download & Execute componentsole32.dll::CoCreateInstance
ole32.dll::CreateStreamOnHGlobal
SECURITY_BASE_APIUses Security Base APIadvapi32.dll::AreAllAccessesGranted
advapi32.dll::AreAnyAccessesGranted
advapi32.dll::ImpersonateLoggedOnUser
WIN32_PROCESS_APICan Create Process and Threadskernel32.dll::CreateProcessA
kernel32.dll::OpenProcess
kernel32.dll::SetProcessShutdownParameters
kernel32.dll::OpenSemaphoreA
kernel32.dll::CloseHandle
kernel32.dll::CreateThread
WIN_BASE_APIUses Win Base APIkernel32.dll::TerminateProcess
kernel32.dll::SetSystemPowerState
kernel32.dll::LoadLibraryExA
kernel32.dll::LoadLibraryA
kernel32.dll::GetDriveTypeA
kernel32.dll::GetStartupInfoA
WIN_BASE_EXEC_APICan Execute other programskernel32.dll::WinExec
kernel32.dll::AllocConsole
kernel32.dll::FillConsoleOutputCharacterA
kernel32.dll::FlushConsoleInputBuffer
kernel32.dll::FreeConsole
kernel32.dll::SetConsoleActiveScreenBuffer
WIN_BASE_IO_APICan Create Fileskernel32.dll::CopyFileA
kernel32.dll::CreateFileA
kernel32.dll::DeleteFileA
kernel32.dll::MoveFileExA
kernel32.dll::MoveFileA
kernel32.dll::GetWindowsDirectoryA
WIN_BASE_USER_APIRetrieves Account Informationkernel32.dll::QueryDosDeviceA
WIN_NETWORK_APISupports Windows Networkingmpr.dll::WNetAddConnectionA
mpr.dll::WNetConnectionDialog
mpr.dll::WNetDisconnectDialog
WIN_REG_APICan Manipulate Windows Registryadvapi32.dll::RegCreateKeyExA
advapi32.dll::RegDeleteKeyA
advapi32.dll::RegOpenKeyExA
advapi32.dll::RegQueryInfoKeyA
advapi32.dll::RegQueryValueExA
advapi32.dll::RegSetValueExA
WIN_TIME_APICan Modify Timekernel32.dll::SetSystemTimeAdjustment
WIN_USER_APIPerforms GUI Actionsuser32.dll::ActivateKeyboardLayout
user32.dll::AppendMenuA
user32.dll::CreateMenu
user32.dll::EmptyClipboard
user32.dll::FindWindowExA
user32.dll::FindWindowA

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