MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b66c4188710385ce8216d9d60df0b0a33b2800379fdf1843f8ddc558eff1b38a. 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: 16


Intelligence 16 IOCs YARA 23 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b66c4188710385ce8216d9d60df0b0a33b2800379fdf1843f8ddc558eff1b38a
SHA3-384 hash: c22aa7b340ad1c2996a2b45f97bcff0259bc922199d2417a5fd30f1e55b401591fe8693d9980d87204e473749d8bcba9
SHA1 hash: 6922a1817085f60d8e42d136a718f53314196cb9
MD5 hash: 1c5889cc55d684c89dc27474aafe25ca
humanhash: colorado-lake-enemy-november
File name:17443378489ae3e8f81d62c40ac2d847f4c5843a0eb03bf3a7d67204b7b73e96c2e1c0fbe6400.dat-decoded
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'779'712 bytes
First seen:2025-04-11 02:17:32 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 44059999c71bf1bf7e96ce8be48a79af (3 x RemcosRAT)
ssdeep 24576:yak04hAHkcJFQWSxEYhetkdnGw5IRrundhzEBiyA8+MC7YfOjE7bG:ynC3HAhetcGw5fTziu7EO4fG
Threatray 88 similar samples on MalwareBazaar
TLSH T164858B22635E4DFDC09DDBF83D4A87E8CCB8ADE05828544666F73A099A34580F4259FF
TrID 38.0% (.EXE) Win32 Executable Delphi generic (14182/79/4)
28.2% (.EXE) Win64 Executable (generic) (10522/11/4)
12.0% (.EXE) Win32 Executable (generic) (4504/4/1)
5.5% (.EXE) Win16/32 Executable Delphi generic (2072/23)
5.4% (.EXE) OS/2 Executable (generic) (2029/13)
Magika pebin
dhash icon f2ae8e9eb6d8e4f4 (3 x RemcosRAT)
Reporter abuse_ch
Tags:base64-decoded exe RemcosRAT


Avatar
abuse_ch
Malware dropped as base64 encoded payload

Intelligence

File Origin
# of uploads :
1
# of downloads :
549
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
17443378489ae3e8f81d62c40ac2d847f4c5843a0eb03bf3a7d67204b7b73e96c2e1c0fbe6400.dat-decoded
Verdict:
Malicious activity
Analysis date:
2025-04-11 02:20:47 UTC
Tags:
delphi dbatloader loader remcos rat remote stealer mpress
Link:
https://app.any.run/tasks/167c2876-3a3a-455b-a27a-b726dd87d264

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/1763/
Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67f87cc1d6e7c3effacf878d
Tags:
autorun delphi cobalt emotet
Result
Verdict:
Malware
Maliciousness:

Behaviour
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
DNS request
Connection attempt
Sending a custom TCP request
Sending an HTTP GET request
Creating a file in the %temp% subdirectories
Reading critical registry keys
Forced shutdown of a system process
Stealing user critical data
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
adaptive-context borland_delphi fingerprint keylogger packed packed packer_detected
Link:
https://www.filescan.io/uploads/67f87be040adfb5162bf52ae/reports/a9cf3594-a21f-4520-9236-3c8f5bfc355c/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_60%
Link:
https://www.hybrid-analysis.com/sample/b66c4188710385ce8216d9d60df0b0a33b2800379fdf1843f8ddc558eff1b38a
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/79f2354b-a83e-48f5-b413-32285f950c17
Result
Threat name:
Remcos, DBatLoader
Create hunting rule
Detection:
malicious
Classification:
rans.phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1662713
Signature
Allocates many large memory junks
Allocates memory in foreign processes
Antivirus detection for URL or domain
Attempt to bypass Chrome Application-Bound Encryption
C2 URLs / IPs found in malware configuration
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)
Detected Remcos RAT
Disable UAC(promptonsecuredesktop)
Drops or copies cmd.exe with a different name (likely to bypass HIPS)
Drops PE files to the user root directory
Drops PE files with a suspicious file extension
Found malware configuration
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for submitted file
Sample uses process hollowing technique
Sigma detected: DLL Search Order Hijackig Via Additional Space in Path
Sigma detected: Execution from Suspicious Folder
Sigma detected: Potential Data Stealing Via Chromium Headless Debugging
Sigma detected: Remcos
Suricata IDS alerts for network traffic
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)
Tries to steal Mail credentials (via file registry)
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
Writes to foreign memory regions
Yara detected DBatLoader
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: 1662713 Sample: 17443378489ae3e8f81d62c40ac... Startdate: 11/04/2025 Architecture: WINDOWS Score: 100 69 62.113.200.214 TTMDE Germany 2->69 71 relentlesswicked.myvnc.com 2->71 73 geoplugin.net 2->73 87 Suricata IDS alerts for network traffic 2->87 89 Found malware configuration 2->89 91 Malicious sample detected (through community Yara rule) 2->91 93 12 other signatures 2->93 9 17443378489ae3e8f81d62c40ac2d847f4c5843a0eb03bf3a7d67204b7b73e96c2e1c0fbe6400.dat-decoded.exe 8 2->9         started        13 rundll32.exe 3 2->13         started        15 rundll32.exe 2->15         started        17 3 other processes 2->17 signatures3 process4 file5 67 C:\Users\user\Links\Qwzblgid.PIF, PE32 9->67 dropped 141 Drops PE files with a suspicious file extension 9->141 143 Writes to foreign memory regions 9->143 145 Allocates memory in foreign processes 9->145 147 4 other signatures 9->147 19 SndVol.exe 9 26 9->19         started        23 cmd.exe 1 9->23         started        25 cmd.exe 1 9->25         started        27 cmd.exe 1 9->27         started        29 Qwzblgid.PIF 13->29         started        31 Qwzblgid.PIF 15->31         started        33 Qwzblgid.PIF 17->33         started        35 Qwzblgid.PIF 17->35         started        37 Qwzblgid.PIF 17->37         started        signatures6 process7 dnsIp8 79 geoplugin.net 178.237.33.50, 49718, 80 ATOM86-ASATOM86NL Netherlands 19->79 81 relentlesswicked.myvnc.com 147.124.214.238, 1223, 49714, 49716 AC-AS-1US United States 19->81 95 Detected Remcos RAT 19->95 97 Attempt to bypass Chrome Application-Bound Encryption 19->97 99 Tries to harvest and steal browser information (history, passwords, etc) 19->99 117 3 other signatures 19->117 50 5 other processes 19->50 101 Uses ping.exe to sleep 23->101 103 Uses schtasks.exe or at.exe to add and modify task schedules 23->103 105 Uses ping.exe to check the status of other devices and networks 23->105 53 4 other processes 23->53 56 2 other processes 25->56 58 2 other processes 27->58 107 Writes to foreign memory regions 29->107 109 Allocates memory in foreign processes 29->109 111 Allocates many large memory junks 29->111 39 colorcpl.exe 29->39         started        113 Creates a thread in another existing process (thread injection) 31->113 115 Injects a PE file into a foreign processes 31->115 42 colorcpl.exe 31->42         started        44 colorcpl.exe 33->44         started        46 SndVol.exe 35->46         started        48 SndVol.exe 37->48         started        signatures9 process10 dnsIp11 119 Contains functionality to bypass UAC (CMSTPLUA) 39->119 121 Detected Remcos RAT 39->121 123 Contains functionalty to change the wallpaper 39->123 139 3 other signatures 39->139 75 192.168.2.4, 1223, 138, 443 unknown unknown 50->75 125 Tries to steal Mail credentials (via file registry) 50->125 127 Tries to steal Instant Messenger accounts or passwords 50->127 129 Tries to steal Mail credentials (via file / registry access) 50->129 131 Tries to harvest and steal browser information (history, passwords, etc) 50->131 60 chrome.exe 50->60         started        63 msedge.exe 50->63         started        65 C:\Users\Public\alpha.pif, PE32 53->65 dropped 133 Drops PE files to the user root directory 53->133 135 Drops PE files with a suspicious file extension 53->135 137 Drops or copies cmd.exe with a different name (likely to bypass HIPS) 53->137 77 127.0.0.1 unknown unknown 56->77 file12 signatures13 process14 dnsIp15 83 googlehosted.l.googleusercontent.com 142.250.80.97, 443, 49733, 49734 GOOGLEUS United States 60->83 85 clients2.googleusercontent.com 60->85
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b66c4188710385ce8216d9d60df0b0a33b2800379fdf1843f8ddc558eff1b38a
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b66c4188710385ce8216d9d60df0b0a33b2800379fdf1843f8ddc558eff1b38a/
Threat name:
Win32.Trojan.Remcos
Create hunting rule
Status:
Malicious
First seen:
2025-04-11 05:33:44 UTC
AV detection:
23 of 37 (62.16%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wzwedcdraoc45aqw3hla34fqum5sqabxt7prqq7y3xcvr37rwofa._file
Verdict:
malicious
Label(s):
dbatloader
Create hunting rule
remcos
Create hunting rule
Similar samples:
061b716c6ca8262d658b5877cd23d1013e90831193da7e19cd03ca0f22b176bc
RemcosRAT
34c11f6af211f7bc8411e99e4ac10ff5232e9b30d72962852cd2fd20e43c3f01
RemcosRAT
4e83dca9f0fc2e50b3c4b2abd8161e2ee5857286ae7bf9ffa5c789cdf2542052
RemcosRAT
a3114edcd192349ce4a5638983bf46a73b279e4bb2962fe263b32e4ea8465b9a
RemcosRAT
b66c4188710385ce8216d9d60df0b0a33b2800379fdf1843f8ddc558eff1b38a
RemcosRAT
ee7490fcb05940962fdcb68469dcbd15e0d4739f0e74e55a161597314552de95
RemcosRAT
error
RemcosRAT
+ 78 additional samples on MalwareBazaar
Result
Malware family:
modiloader
Create hunting rule
Score:
  10/10
Tags:
family:modiloader collection credential_access discovery stealer trojan
Link:
https://tria.ge/reports/250411-crbksaxny4/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies data under HKEY_USERS
Modifies registry class
Runs ping.exe
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
System Network Configuration Discovery: Internet Connection Discovery
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Checks computer location settings
Executes dropped EXE
Uses browser remote debugging
ModiLoader Second Stage
ModiLoader, DBatLoader
Modiloader family
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/95bbb1d0-afad-4145-8029-6f5bd10e94e7
Unpacked files
SH256 hash:
b66c4188710385ce8216d9d60df0b0a33b2800379fdf1843f8ddc558eff1b38a
MD5 hash:
1c5889cc55d684c89dc27474aafe25ca
SHA1 hash:
6922a1817085f60d8e42d136a718f53314196cb9
Link:
https://www.unpac.me/results/a1cfa57e-d66b-4dd6-a015-5b975856d492/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b66c41887103/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/b66c4188710385ce8216d9d60df0b0a33b2800379fdf1843f8ddc558eff1b38a

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:BobSoftMiniDelphiBoBBobSoft
Create hunting rule
Author:malware-lu
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: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.

9ae3e8f81d62c40ac2d847f4c5843a0eb03bf3a7d67204b7b73e96c2e1c0fbe6

RemcosRAT

Executable exe b66c4188710385ce8216d9d60df0b0a33b2800379fdf1843f8ddc558eff1b38a

(this sample)

  
Dropped by
SHA256 9ae3e8f81d62c40ac2d847f4c5843a0eb03bf3a7d67204b7b73e96c2e1c0fbe6
  
Dropped by
MD5 859fa0df1de213a5f202aa573aeeebf4
  
URLhaus
https://urlhaus.abuse.ch/url/3506973/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/1763/

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
WIN32_PROCESS_APICan Create Process and Threadskernel32.dll::CloseHandle
kernel32.dll::CreateThread
WIN_BASE_APIUses Win Base APIkernel32.dll::LoadLibraryExA
kernel32.dll::LoadLibraryA
kernel32.dll::GetStartupInfoA
kernel32.dll::GetDiskFreeSpaceA
kernel32.dll::GetCommandLineA
WIN_BASE_IO_APICan Create Fileskernel32.dll::CreateFileA
kernel32.dll::FindFirstFileA
version.dll::GetFileVersionInfoSizeA
version.dll::GetFileVersionInfoA
WIN_REG_APICan Manipulate Windows Registryadvapi32.dll::RegOpenKeyExA
advapi32.dll::RegQueryValueExA
WIN_USER_APIPerforms GUI Actionsuser32.dll::ActivateKeyboardLayout
user32.dll::CreateMenu
user32.dll::EmptyClipboard
user32.dll::FindWindowA
user32.dll::OpenClipboard
user32.dll::PeekMessageA

Comments