MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b8af0c741224f1b88f0ce141c967d0212ed41686a32ac3cc461c7f624735c646. 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: 18

Intelligence 18 IOCs YARA 20 File information Comments

SHA256 hash:	b8af0c741224f1b88f0ce141c967d0212ed41686a32ac3cc461c7f624735c646
SHA3-384 hash:	b966bae9d2e008660c3e64e9977b0287c11200e1dc7d1f9d8da452ebdee360e5ab49c61518207e60f47842597313bfc3
SHA1 hash:	caab632ebeeb4e30335de646cf8bf0943e85ba4b
MD5 hash:	d5864d2e68740beb9f70738397d6e90f
humanhash:	bacon-london-vermont-quebec
File name:	Air Waybill no 6979374150.jpg.exe
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	1'332'224 bytes
First seen:	2025-05-12 12:59:49 UTC
Last seen:	2025-05-19 09:12:00 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	3d95adbf13bbe79dc24dccb401c12091 (881 x AgentTesla, 737 x FormBook, 236 x SnakeKeylogger)
ssdeep	24576:Ytb20pkaCqT5TBWgNQ7aWvcji+Bbxca5pYIZG7c6JBR6A:hVg5tQ7aWvOXJPpH6Jr5
Threatray	2'167 similar samples on MalwareBazaar
TLSH	T1B155D01363DE8361C3B25273BA557B01BEBF782506A1F96B2FD4093CE920162525E773
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	aae2f3e38383b629 (2'034 x Formbook, 1'183 x CredentialFlusher, 666 x AgentTesla)
Reporter	James_inthe_box
Tags:	exe RemcosRAT

Intelligence

File Origin

# of uploads :

# of downloads :

576

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

Air Waybill no 6979374150.jpg.exe

Verdict:

Malicious activity

Analysis date:

2025-05-12 13:01:29 UTC

Tags:

auto-startup

Link:

https://app.any.run/tasks/0bf98cf0-c35d-4c77-b317-3e21e0145979

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

Verdict:

Malicious

Score:

94.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6821f1abe16384d6a703c94b

Tags:

underscore autorun autoit emotet

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

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

Sending a custom TCP request

DNS request

Sending an HTTP GET request

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 autoit compiled-script evasive fingerprint keylogger masquerade microsoft_visual_cc packed packed packer_detected

Link:

https://www.filescan.io/uploads/6821f0e9d95f3e34e9670cd4/reports/b0ad8e55-ad63-412e-8512-08f6c4d831dd/overview

Verdict:

Malicious

Labled as:

Trojan.Generic

Link:

https://www.hybrid-analysis.com/sample/b8af0c741224f1b88f0ce141c967d0212ed41686a32ac3cc461c7f624735c646

Malware family:

REMCOS

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/03d8980d-c5b2-4c01-bfa2-7a79dbd81ad5

Result

Threat name:

Remcos

Detection:

malicious

Classification:

phis.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1687603

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

Installs a global keyboard hook

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 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

Yara detected WebBrowserPassView password recovery tool

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/b8af0c741224f1b88f0ce141c967d0212ed41686a32ac3cc461c7f624735c646

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/b8af0c741224f1b88f0ce141c967d0212ed41686a32ac3cc461c7f624735c646/

Threat name:

Win32.Trojan.AutoitInject

Status:

Malicious

First seen:

2025-05-10 04:07:16 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

29 of 37 (78.38%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=xcxqy5asety3rdym4fa4sz6qeexnifugumvmhtcgdr7werzvyzda._file

Verdict:

malicious

Label(s):

unc_loader_036

autoit

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:remotehost collection discovery rat

Link:

https://tria.ge/reports/250512-p8th5ssvbw/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

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:

23.146.242.237:5817

Verdict:

Suspicious

Tags:

remcos

YARA:

n/a

Link:

https://app.threat.zone/submission/bf8ee65d-4481-4691-b54d-390c9fc72315

Unpacked files

SH256 hash:

b8af0c741224f1b88f0ce141c967d0212ed41686a32ac3cc461c7f624735c646

MD5 hash:

d5864d2e68740beb9f70738397d6e90f

SHA1 hash:

caab632ebeeb4e30335de646cf8bf0943e85ba4b

Link:

https://www.unpac.me/results/eb4f4d18-3163-4b43-9534-c62303de3922/

SH256 hash:

1ff938409377c30f3720c47c6163458e3c629176145d63b650a319d37959e600

MD5 hash:

ae25aaeaf98dcf121a1d65d08fa59c8a

SHA1 hash:

bec257fea3ccbb9d27d9cc7629b0b17d9e67aeaf

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/eb4f4d18-3163-4b43-9534-c62303de3922/

Parent samples :

53e050000913565123e12dd55564f60472ec53dd4c3273f6ce341406b2577094
b8af0c741224f1b88f0ce141c967d0212ed41686a32ac3cc461c7f624735c646
059bcc0024f1533c5d63e3dde7ef187be956b855fd3f8792673cd575e053050a
6f1ddb53c3659c4aa4060229d591081b96bf56337238ca8594dc0dd5f939caaa

Malware family:

WebBrowserPassView

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/b8af0c741224/report/overview.html

Please note that we are no longer able to provide a coverage score for Virus Total.

Threat name:

Remcos

Score:

0.90

Link:

https://yomi.yoroi.company/submissions/b8af0c741224f1b88f0ce141c967d0212ed41686a32ac3cc461c7f624735c646

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_rat_generic Create hunting rule
Author:	Reedus0
Description:	Rule for detecting generic RAT malware

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.

Malspam

RemcosRAT

exe b8af0c741224f1b88f0ce141c967d0212ed41686a32ac3cc461c7f624735c646

(this sample)

Delivery method

Distributed via e-mail attachment

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::CopyFileW KERNEL32.dll::CreateDirectoryW KERNEL32.dll::CreateHardLinkW IPHLPAPI.DLL::IcmpCreateFile KERNEL32.dll::CreateFileW KERNEL32.dll::DeleteFileW
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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