MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b90f8129ec55162b7b71f43cfad32c11666a07b22afca589e6ddeacac317a56a. 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: 17


Intelligence 17 IOCs YARA 18 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b90f8129ec55162b7b71f43cfad32c11666a07b22afca589e6ddeacac317a56a
SHA3-384 hash: d7988bccb498534f759d429b9a441f57c0b9bc7f9d2412529fa958c24423dfea92d7e1fa418a59702557afb5a2355c2e
SHA1 hash: 68cc29e62bb53f75a17f07ff0609e5b5f4657af8
MD5 hash: d285e6ce30de39dbddd3e26b4ab32671
humanhash: nevada-summer-fifteen-ack
File name:Doc NBD250415-1 DOC BLCKCOSHA3102349UW.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:1'366'528 bytes
First seen:2025-05-22 05:30:11 UTC
Last seen:2025-06-10 08:47:35 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 3d95adbf13bbe79dc24dccb401c12091 (881 x AgentTesla, 737 x FormBook, 236 x SnakeKeylogger)
ssdeep 24576:Jtb20pkaCqT5TBWgNQ7aC08AjP4Kp181P4wGk4t8/6A:aVg5tQ7aChAjPfwP4i4U5
TLSH T1DA55BE13739D836DC3B252737A357721AE7BBE2706A1B45B3FD48D3CA920121521A6E3
TrID 40.3% (.EXE) Win64 Executable (generic) (10522/11/4)
19.3% (.EXE) Win16 NE executable (generic) (5038/12/1)
17.2% (.EXE) Win32 Executable (generic) (4504/4/1)
7.7% (.EXE) OS/2 Executable (generic) (2029/13)
7.6% (.EXE) Generic Win/DOS Executable (2002/3)
Magika pebin
dhash icon e2ee8a8eb6d8ecf4 (56 x AgentTesla, 39 x RemcosRAT, 38 x GuLoader)
Reporter abuse_ch
Tags:exe RAT RemcosRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
480
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Doc NBD250415-1 DOC BLCKCOSHA3102349UW.exe
Verdict:
Malicious activity
Analysis date:
2025-05-22 05:52:20 UTC
Tags:
auto-startup
Link:
https://app.any.run/tasks/32c9c5a1-1952-4c1b-9d27-67809d37f7f0

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

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=682eb878c28c67d666444efb
Tags:
autorun autoit emotet remcos
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% directory
Creating a file
Creating a process from a recently created file
Launching a process
Сreating synchronization primitives
DNS request
Connection attempt
Sending a custom TCP request
Sending an HTTP GET request
Reading critical registry keys
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 autoit compiled-script fingerprint keylogger microsoft_visual_cc packed packed packer_detected remcos
Link:
https://www.filescan.io/uploads/682eb6b3171e01f9592a0219/reports/f1b7078d-a4ea-433b-be8a-89bd9058155b/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/b90f8129ec55162b7b71f43cfad32c11666a07b22afca589e6ddeacac317a56a
Malware family:
REMCOS
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/af839cd5-f76a-4f38-bfcb-c0f9bb63cbe9
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1696509
Signature
Antivirus detection for dropped file
Binary is likely a compiled AutoIt script file
C2 URLs / IPs found in malware configuration
Detected Remcos RAT
Drops VBS files to the startup folder
Found hidden mapped module (file has been removed from disk)
Found malware configuration
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 dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Drops script at startup location
Sigma detected: Remcos
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
System process connects to network (likely due to code injection or exploit)
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 dynamic DNS services
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
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: 1696509 Sample: Doc NBD250415-1 DOC BLCKCOS... Startdate: 22/05/2025 Architecture: WINDOWS Score: 100 61 vpnsplashstech.duckdns.org 2->61 63 geoplugin.net 2->63 85 Suricata IDS alerts for network traffic 2->85 87 Found malware configuration 2->87 89 Malicious sample detected (through community Yara rule) 2->89 93 12 other signatures 2->93 11 Doc NBD250415-1 DOC BLCKCOSHA3102349UW.exe 6 2->11         started        15 wscript.exe 1 2->15         started        signatures3 91 Uses dynamic DNS services 61->91 process4 file5 59 C:\Users\user\AppData\Local\...\benting.exe, PE32 11->59 dropped 109 Binary is likely a compiled AutoIt script file 11->109 17 benting.exe 3 11->17         started        111 Windows Scripting host queries suspicious COM object (likely to drop second stage) 15->111 21 benting.exe 2 15->21         started        signatures6 process7 file8 51 C:\Users\user\AppData\Roaming\...\benting.vbs, data 17->51 dropped 77 Multi AV Scanner detection for dropped file 17->77 79 Binary is likely a compiled AutoIt script file 17->79 81 Drops VBS files to the startup folder 17->81 83 Switches to a custom stack to bypass stack traces 17->83 23 benting.exe 2 17->23         started        26 svchost.exe 17->26         started        28 benting.exe 2 21->28         started        30 svchost.exe 21->30         started        signatures9 process10 signatures11 95 Binary is likely a compiled AutoIt script file 23->95 32 benting.exe 2 23->32         started        35 svchost.exe 23->35         started        97 Found hidden mapped module (file has been removed from disk) 26->97 99 Writes to foreign memory regions 28->99 101 Maps a DLL or memory area into another process 28->101 37 svchost.exe 28->37         started        process12 signatures13 69 Binary is likely a compiled AutoIt script file 32->69 71 Writes to foreign memory regions 32->71 73 Maps a DLL or memory area into another process 32->73 39 svchost.exe 4 17 32->39         started        75 Detected Remcos RAT 37->75 process14 dnsIp15 65 vpnsplashstech.duckdns.org 103.237.86.82, 49725, 49727, 53038 BGNR-AP2BainandCompanySG unknown 39->65 67 geoplugin.net 178.237.33.50, 49728, 80 ATOM86-ASATOM86NL Netherlands 39->67 53 C:\Users\user\AppData\Local\Temp\TH2505.tmp, MS-DOS 39->53 dropped 55 C:\Users\user\AppData\Local\Temp\TH24C6.tmp, MS-DOS 39->55 dropped 57 C:\Users\user\AppData\Local\Temp\TH2496.tmp, PE32 39->57 dropped 103 System process connects to network (likely due to code injection or exploit) 39->103 105 Detected Remcos RAT 39->105 107 Maps a DLL or memory area into another process 39->107 44 svchost.exe 1 39->44         started        47 svchost.exe 1 39->47         started        49 svchost.exe 2 39->49         started        file16 signatures17 process18 signatures19 113 Tries to steal Instant Messenger accounts or passwords 44->113 115 Tries to harvest and steal browser information (history, passwords, etc) 44->115 117 Tries to steal Mail credentials (via file / registry access) 47->117
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b90f8129ec55162b7b71f43cfad32c11666a07b22afca589e6ddeacac317a56a
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b90f8129ec55162b7b71f43cfad32c11666a07b22afca589e6ddeacac317a56a/
Threat name:
Win32.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2025-05-22 05:32:17 UTC
File Type:
PE (Exe)
Extracted files:
14
AV detection:
31 of 38 (81.58%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=xehyckpmkulcw63r6q6pvuzmcftgub5sfl6klcpg3xvmvqyxuvva._file
Verdict:
malicious
Label(s):
autoit
Create hunting rule
remcos
Create hunting rule
unc_loader_036
Create hunting rule
Similar samples:
error
RemcosRAT
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:mexico collection discovery rat
Link:
https://tria.ge/reports/250522-f8c2qahl5s/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Program crash
System Location Discovery: System Language Discovery
AutoIT Executable
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Drops startup file
Executes dropped EXE
Detected Nirsoft tools
NirSoft MailPassView
NirSoft WebBrowserPassView
Remcos
Remcos family
Malware Config
C2 Extraction:
vpnsplashstech.duckdns.org:53038
Unpacked files
SH256 hash:
6607d80dd10dfb2832eb14c78fd7402e9c63f6d3d1ac82b113f099d1d6cc80fb
MD5 hash:
4c84c115a31c5d67f6288b68c2b9f4c6
SHA1 hash:
d8c933a912d3456048e691844cca36cacdf78eb2
Detections:
win_remcos_w0
Create hunting rule
win_remcos_auto
Create hunting rule
Remcos
Create hunting rule
malware_windows_remcos_rat
Create hunting rule
win_remcos_rat_unpacked
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
Link:
https://www.unpac.me/results/ba5bfb90-fbc6-4371-a24d-ef89b146df07/
Parent samples :
b90f8129ec55162b7b71f43cfad32c11666a07b22afca589e6ddeacac317a56a
6607d80dd10dfb2832eb14c78fd7402e9c63f6d3d1ac82b113f099d1d6cc80fb
SH256 hash:
b90f8129ec55162b7b71f43cfad32c11666a07b22afca589e6ddeacac317a56a
MD5 hash:
d285e6ce30de39dbddd3e26b4ab32671
SHA1 hash:
68cc29e62bb53f75a17f07ff0609e5b5f4657af8
Link:
https://www.unpac.me/results/ba5bfb90-fbc6-4371-a24d-ef89b146df07/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b90f8129ec55/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/b90f8129ec55162b7b71f43cfad32c11666a07b22afca589e6ddeacac317a56a

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:AutoIT_Compiled
Create hunting rule
Author:@bartblaze
Description:Identifies compiled AutoIT script (as EXE). This rule by itself does NOT necessarily mean the detected file is malicious.
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: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: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: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:YahLover
Create hunting rule
Author:Kevin Falcoz
Description:YahLover
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.

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 (HIGH_ENTROPY_VA)high
CHECK_NXMissing Non-Executable Memory Protectioncritical
Reviews
IDCapabilitiesEvidence
AUTH_APIManipulates User AuthorizationADVAPI32.dll::AllocateAndInitializeSid
ADVAPI32.dll::CopySid
ADVAPI32.dll::FreeSid
ADVAPI32.dll::GetLengthSid
ADVAPI32.dll::GetTokenInformation
ADVAPI32.dll::GetAce
COM_BASE_APICan Download & Execute componentsole32.dll::CLSIDFromProgID
ole32.dll::CoCreateInstance
ole32.dll::CoCreateInstanceEx
ole32.dll::CoInitializeSecurity
ole32.dll::CreateStreamOnHGlobal
MULTIMEDIA_APICan Play MultimediaWINMM.dll::mciSendStringW
WINMM.dll::timeGetTime
WINMM.dll::waveOutSetVolume
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::AddAce
ADVAPI32.dll::AdjustTokenPrivileges
ADVAPI32.dll::CheckTokenMembership
ADVAPI32.dll::DuplicateTokenEx
ADVAPI32.dll::GetAclInformation
ADVAPI32.dll::GetSecurityDescriptorDacl
SHELL_APIManipulates System ShellSHELL32.dll::ShellExecuteExW
SHELL32.dll::ShellExecuteW
SHELL32.dll::SHFileOperationW
WIN32_PROCESS_APICan Create Process and ThreadsADVAPI32.dll::CreateProcessAsUserW
KERNEL32.dll::CreateProcessW
ADVAPI32.dll::CreateProcessWithLogonW
KERNEL32.dll::OpenProcess
ADVAPI32.dll::OpenProcessToken
ADVAPI32.dll::OpenThreadToken
WIN_BASE_APIUses Win Base APIKERNEL32.dll::TerminateProcess
KERNEL32.dll::SetSystemPowerState
KERNEL32.dll::LoadLibraryA
KERNEL32.dll::LoadLibraryExW
KERNEL32.dll::LoadLibraryW
KERNEL32.dll::GetDriveTypeW
WIN_BASE_EXEC_APICan Execute other programsKERNEL32.dll::WriteConsoleW
KERNEL32.dll::ReadConsoleW
KERNEL32.dll::SetStdHandle
KERNEL32.dll::GetConsoleCP
KERNEL32.dll::GetConsoleMode
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CopyFileW
KERNEL32.dll::CreateDirectoryW
KERNEL32.dll::CreateHardLinkW
IPHLPAPI.DLL::IcmpCreateFile
KERNEL32.dll::CreateFileW
KERNEL32.dll::DeleteFileW
WIN_BASE_USER_APIRetrieves Account InformationKERNEL32.dll::GetComputerNameW
ADVAPI32.dll::GetUserNameW
ADVAPI32.dll::LogonUserW
ADVAPI32.dll::LookupPrivilegeValueW
WIN_NETWORK_APISupports Windows NetworkingMPR.dll::WNetAddConnection2W
MPR.dll::WNetUseConnectionW
WIN_REG_APICan Manipulate Windows RegistryADVAPI32.dll::RegConnectRegistryW
ADVAPI32.dll::RegCreateKeyExW
ADVAPI32.dll::RegDeleteKeyW
ADVAPI32.dll::RegOpenKeyExW
ADVAPI32.dll::RegQueryValueExW
ADVAPI32.dll::RegSetValueExW
WIN_USER_APIPerforms GUI ActionsUSER32.dll::BlockInput
USER32.dll::CloseDesktop
USER32.dll::CreateMenu
USER32.dll::EmptyClipboard
USER32.dll::FindWindowExW
USER32.dll::FindWindowW

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