MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3cec8f551d1c2779fa8d76bba7e228c0902ec248876f8abd4e29bcb77d982598. 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 1 YARA 19 File information Comments

SHA256 hash:	3cec8f551d1c2779fa8d76bba7e228c0902ec248876f8abd4e29bcb77d982598
SHA3-384 hash:	ebb7123bf24ff3fe2ab16f3ba3544883e5c71623a49d361840016ed0f2a6b8582aecdb243f2e981ab9c266ea918fe0f3
SHA1 hash:	42c6987e47daabaef8c6bf48b941fc32066ac402
MD5 hash:	905c83027a3f47bf41928f74a06b70e0
humanhash:	golf-blossom-venus-don
File name:	Air Waybill no 6979374150.pdf.exe
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	1'348'096 bytes
First seen:	2025-05-01 06:56:33 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	afcdf79be1557326c854b6e20cb900a7 (1'102 x FormBook, 936 x AgentTesla, 399 x RemcosRAT)
ssdeep	24576:wu6J33O0c+JY5UZ+XC0kGso6Fa7uu+6+SKGopnLBNWU6Y6ID3yafWY:6u0c++OCvkGs9Fa7uu+6oGMnNN/6IrmY
Threatray	326 similar samples on MalwareBazaar
TLSH	T15D55CF2273DDC360CB669173BF2AB7016EBB7C614630B85B2F980D7DA950172162D7A3
TrID	32.2% (.EXE) Win64 Executable (generic) (10522/11/4) 20.1% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 15.4% (.EXE) Win16 NE executable (generic) (5038/12/1) 13.7% (.EXE) Win32 Executable (generic) (4504/4/1) 6.2% (.EXE) OS/2 Executable (generic) (2029/13)
Magika	pebin
dhash icon	aae2f3e38383b629 (2'034 x Formbook, 1'183 x CredentialFlusher, 666 x AgentTesla)
Reporter	abuse_ch
Tags:	exe RAT RemcosRAT

abuse_ch

RemcosRAT C2:
103.83.87.190:5817

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOC	ThreatFox Reference
103.83.87.190:5817	https://threatfox.abuse.ch/ioc/1484757/

Intelligence

File Origin

# of uploads :

# of downloads :

332

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

Air Waybill no 6979374150.pdf.exe

Verdict:

Malicious activity

Analysis date:

2025-05-01 07:34:15 UTC

Tags:

auto-startup

Link:

https://app.any.run/tasks/bbcf67d6-1af1-43e9-ace2-57cf31ffcb65

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/5338/

Detection(s):

SecuriteInfo.com.AutoIt.Agent-AOQ.UNOFFICIAL

SecuriteInfo.com.BehavesLike.Win32.Generic.vh.UNOFFICIAL

Verdict:

Malicious

Score:

92.5%

Link:

https://cyber-fortress.com/docs/result/index.php?id=68131dc2c8b2e86d0ac5b062

Tags:

underscore extens agent spawn

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

Connection attempt

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 cmdkey compiled-script cscript fingerprint fingerprint keylogger lolbin masquerade microsoft_visual_cc netsh packed packed packer_detected reg

Link:

https://www.filescan.io/uploads/68131b29212716475fb1ccb6/reports/3c2b29f9-9a0b-4d2d-b149-9ae7aac35bae/overview

Verdict:

Malicious

Labled as:

Trojan.Generic

Link:

https://www.hybrid-analysis.com/sample/3cec8f551d1c2779fa8d76bba7e228c0902ec248876f8abd4e29bcb77d982598

Malware family:

REMCOS

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/b365fe39-ce7f-4e37-9bab-5e781cdca0f1

Result

Threat name:

Remcos

Detection:

malicious

Classification:

troj.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1678734

Signature

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 malware configuration

Initial sample is a PE file and has a suspicious name

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: Suspicious Double Extension File Execution

Sigma detected: WScript or CScript Dropper

Switches to a custom stack to bypass stack traces

System process connects to network (likely due to code injection or exploit)

Uses an obfuscated file name to hide its real file extension (double extension)

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

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/3cec8f551d1c2779fa8d76bba7e228c0902ec248876f8abd4e29bcb77d982598

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/3cec8f551d1c2779fa8d76bba7e228c0902ec248876f8abd4e29bcb77d982598/

Threat name:

Win32.Backdoor.Remcos

Status:

Malicious

First seen:

2025-04-10 07:32:11 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

27 of 36 (75.00%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=htwi6vi5dqtxt6uno252pyriycic5qsiq5xyvpkofg6lo7myewma._file

Verdict:

malicious

Label(s):

unc_loader_036

remcos

RemcosRAT

3412190c457713b0bbaab663590654aac3d8ef9f30af78f45dd9a0d581f49e59

RemcosRAT

a8c3857a246e30062a32ecc8d556967c9ff5ae01abfcee9082b50e8781b5db48

RemcosRAT

ad4e305243eea4eb48308ce4bccd6b999ed93f9810a82236987187fda9e12de1

RemcosRAT

ce2fbb9b7200bc539e8f206f3a04426a72b88deeb1ea36d73ce896bdd1b342a4

RemcosRAT

+ 316 additional samples on MalwareBazaar

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:remotehost discovery rat

Link:

https://tria.ge/reports/250501-hqqwza1sax/

Behaviour

Suspicious behavior: MapViewOfSection

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

System Location Discovery: System Language Discovery

AutoIT Executable

Suspicious use of SetThreadContext

Drops startup file

Executes dropped EXE

Remcos

Remcos family

Malware Config

C2 Extraction:

103.83.87.190:5817

Verdict:

Suspicious

Tags:

trojan remcos

YARA:

SUSP_Imphash_Mar23_3

Link:

https://app.threat.zone/submission/4543c496-4653-4b1c-b118-11539bf700b1

Unpacked files

SH256 hash:

ed596ce9e2b8bafd0316d43cd006d2e7c0cc853149d0e49923a4bb86836fd1d3

MD5 hash:

6ef15e0a9e67238673568c7a09ad4309

SHA1 hash:

52d3e14f255e260959950cd01d455819e304ea97

Detections:

win_remcos_w0

win_remcos_auto

Remcos

malware_windows_remcos_rat

win_remcos_rat_unpacked

INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM

Link:

https://www.unpac.me/results/0ec8d80a-983b-432b-bd35-dca0122fc2e8/

Parent samples :

3412190c457713b0bbaab663590654aac3d8ef9f30af78f45dd9a0d581f49e59
ba07a481a7e8a35c8b0f80de7ceb81307f0efd284656bece481aa4ac4e088af9
3cec8f551d1c2779fa8d76bba7e228c0902ec248876f8abd4e29bcb77d982598
5b97cd88bfb20b5d92d426072bc581d159fea064159872e983805bd2c225e64c
ad6646974047ad5be1ebb7bd8778f751f6e337ebde294333fa307f69d537afa1

SH256 hash:

3cec8f551d1c2779fa8d76bba7e228c0902ec248876f8abd4e29bcb77d982598

MD5 hash:

905c83027a3f47bf41928f74a06b70e0

SHA1 hash:

42c6987e47daabaef8c6bf48b941fc32066ac402

Link:

https://www.unpac.me/results/0ec8d80a-983b-432b-bd35-dca0122fc2e8/

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/3cec8f551d1c2779fa8d76bba7e228c0902ec248876f8abd4e29bcb77d982598

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:	SUSP_Imphash_Mar23_3 Create hunting rule
Author:	Arnim Rupp (https://github.com/ruppde)
Description:	Detects imphash often found in malware samples (Maximum 0,25% hits with search for 'imphash:x p:0' on Virustotal) = 99,75% hits
Reference:	Internal Research

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:	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.

Cape

https://www.capesandbox.com/analysis/5338/

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

ID	Title	Severity
CHECK_AUTHENTICODE	Missing Authenticode	high
CHECK_DLL_CHARACTERISTICS	Missing dll Security Characteristics (HIGH_ENTROPY_VA)	high
CHECK_NX	Missing Non-Executable Memory Protection	critical

Reviews

ID	Capabilities	Evidence
AUTH_API	Manipulates User Authorization	ADVAPI32.dll::AllocateAndInitializeSid ADVAPI32.dll::CopySid ADVAPI32.dll::FreeSid ADVAPI32.dll::GetLengthSid ADVAPI32.dll::GetTokenInformation ADVAPI32.dll::GetAce
COM_BASE_API	Can Download & Execute components	ole32.dll::CLSIDFromProgID ole32.dll::CoCreateInstance ole32.dll::CoCreateInstanceEx ole32.dll::CoInitializeSecurity ole32.dll::CreateStreamOnHGlobal
MULTIMEDIA_API	Can Play Multimedia	WINMM.dll::mciSendStringW WINMM.dll::timeGetTime WINMM.dll::waveOutSetVolume
SECURITY_BASE_API	Uses Security Base API	ADVAPI32.dll::AddAce ADVAPI32.dll::AdjustTokenPrivileges ADVAPI32.dll::CheckTokenMembership ADVAPI32.dll::DuplicateTokenEx ADVAPI32.dll::GetAclInformation ADVAPI32.dll::GetSecurityDescriptorDacl
SHELL_API	Manipulates System Shell	SHELL32.dll::ShellExecuteExW SHELL32.dll::ShellExecuteW SHELL32.dll::SHFileOperationW
WIN32_PROCESS_API	Can Create Process and Threads	ADVAPI32.dll::CreateProcessAsUserW KERNEL32.dll::CreateProcessW ADVAPI32.dll::CreateProcessWithLogonW KERNEL32.dll::OpenProcess ADVAPI32.dll::OpenProcessToken ADVAPI32.dll::OpenThreadToken
WIN_BASE_API	Uses Win Base API	KERNEL32.dll::TerminateProcess KERNEL32.dll::SetSystemPowerState KERNEL32.dll::LoadLibraryA KERNEL32.dll::LoadLibraryExW KERNEL32.dll::LoadLibraryW KERNEL32.dll::GetDriveTypeW
WIN_BASE_EXEC_API	Can Execute other programs	KERNEL32.dll::WriteConsoleW KERNEL32.dll::ReadConsoleW KERNEL32.dll::SetStdHandle KERNEL32.dll::GetConsoleCP KERNEL32.dll::GetConsoleMode
WIN_BASE_IO_API	Can Create Files	KERNEL32.dll::CopyFileExW KERNEL32.dll::CopyFileW KERNEL32.dll::CreateDirectoryW KERNEL32.dll::CreateHardLinkW IPHLPAPI.DLL::IcmpCreateFile KERNEL32.dll::CreateFileW
WIN_BASE_USER_API	Retrieves Account Information	KERNEL32.dll::GetComputerNameW ADVAPI32.dll::GetUserNameW ADVAPI32.dll::LogonUserW ADVAPI32.dll::LookupPrivilegeValueW
WIN_NETWORK_API	Supports Windows Networking	MPR.dll::WNetAddConnection2W MPR.dll::WNetUseConnectionW
WIN_REG_API	Can Manipulate Windows Registry	ADVAPI32.dll::RegConnectRegistryW ADVAPI32.dll::RegCreateKeyExW ADVAPI32.dll::RegDeleteKeyW ADVAPI32.dll::RegOpenKeyExW ADVAPI32.dll::RegQueryValueExW ADVAPI32.dll::RegSetValueExW
WIN_USER_API	Performs GUI Actions	USER32.dll::BlockInput USER32.dll::CloseDesktop USER32.dll::CreateMenu USER32.dll::EmptyClipboard USER32.dll::FindWindowExW USER32.dll::FindWindowW

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