MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d3b62483fbf63ecc9b1813d77f80591d6cf00892eb030486475b6634c6c2ab0b. 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: 14

Intelligence 14 IOCs YARA 15 File information Comments

SHA256 hash:	d3b62483fbf63ecc9b1813d77f80591d6cf00892eb030486475b6634c6c2ab0b
SHA3-384 hash:	80e397f8bc9db2c8fd36b72c5e5d4bf5891de4bbfe524599013bbe1f1b6561fe4962909a384ce88e924c48e05556437e
SHA1 hash:	596dd223961e1ba29fd39da66093da2a53aa543b
MD5 hash:	b3489137aa5c8a50478e7cd08ca3cd7b
humanhash:	eleven-yankee-juliet-vegan
File name:	LisectAVT_2403002C_28.exe
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	480'773 bytes
First seen:	2024-07-25 01:46:54 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	5d354883fe6f15fcf48045037a99fb7a (118 x RemcosRAT)
ssdeep	12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQS5n9:uiLJbpI7I2WhQqZ759
Threatray	4'297 similar samples on MalwareBazaar
TLSH	T1FFA4AE02BAD2C072D57161344D2AE735DABDBD202835997BB3E61D5BFD30180A73A7B2
TrID	32.2% (.EXE) Win64 Executable (generic) (10523/12/4) 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)
File icon (PE):
dhash icon	c4d48eaa8ad4d4f8 (1'000 x RemcosRAT, 1 x Worm.Ramnit, 1 x Vjw0rm)
Reporter	Anonymous
Tags:	exe RemcosRAT

Anonymous

this malware sample is very nasty!

Intelligence

File Origin

# of uploads :

# of downloads :

305

Origin country :

Vendor Threat Intelligence

Detection(s):

Win.Trojan.Remcos-9841897-0

Win.Trojan.Remcos-10002580-0

Gathering data

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Creating a file in the Windows subdirectories

Creating a file in the %temp% directory

Сreating synchronization primitives

Creating a process from a recently created file

Creating a process with a hidden window

Creating a window

Running batch commands

Launching a process

Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch

Connection attempt to an infection source

Enabling autorun

Unauthorized injection to a system process

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

crypto epmicrosoft_visual_cc evasive eventvwr fingerprint fingerprint keylogger lolbin microsoft_visual_cc overlay remcos shell32

Link:

https://www.filescan.io/uploads/66a1aeaa9149fd55f990349e/reports/b3299f1c-3bde-4db1-b594-2ae44d273e72/overview

Result

Verdict:

MALICIOUS

Details

Windows PE Executable

Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.

Result

Threat name:

Remcos

Detection:

malicious

Classification:

rans.troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1481364

Behaviour

Behavior Graph:

n/a

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/d3b62483fbf63ecc9b1813d77f80591d6cf00892eb030486475b6634c6c2ab0b

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/d3b62483fbf63ecc9b1813d77f80591d6cf00892eb030486475b6634c6c2ab0b/

Threat name:

Win32.Trojan.Remcos

Status:

Malicious

First seen:

2024-07-25 01:47:20 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

33 of 38 (86.84%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=2o3cja736y7mzgyycplx7aczdvwpaces5mbqjbshlntdjrwcvmfq._file

Verdict:

malicious

Label(s):

remcos

RemcosRAT

31edb5c9a0590d100f941cfcb0c142abf141fba4a90c6bddb6c7fc59b4475f28

RemcosRAT

3ab2ca682019279e28525a8ff1a72e08badba1c0f3012f926bad1528b2b0944a

RemcosRAT

4abdfcd240b09c5e1d8cd90d780c3db8f4f3d892be71d7b307d44051e0c15670

RemcosRAT

77d20c7a8b7bd53e099dc0bc93fe6ebd77af2888903659359bb275aa732885ea

RemcosRAT

8c2653e4d9998668579383d87f291afe6ba5740ec3bc6d8f44618c0f9af77189

RemcosRAT

a0a124777df35d015c84f61af9a8e4d0dba82120a30fa031b73b885a13d88214

RemcosRAT

+ 4'287 additional samples on MalwareBazaar

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:vencord discovery persistence rat

Link:

https://tria.ge/reports/240725-b7pa5stglf/

Behaviour

Modifies registry class

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Drops file in System32 directory

Suspicious use of SetThreadContext

Adds Run key to start application

Checks computer location settings

Executes dropped EXE

Loads dropped DLL

Adds policy Run key to start application

Remcos

Malware Config

C2 Extraction:

147.185.221.18:52136

Verdict:

Malicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/485f2999-eb4f-46ba-ad72-f8377334ebc2

Unpacked files

SH256 hash:

d3b62483fbf63ecc9b1813d77f80591d6cf00892eb030486475b6634c6c2ab0b

MD5 hash:

b3489137aa5c8a50478e7cd08ca3cd7b

SHA1 hash:

596dd223961e1ba29fd39da66093da2a53aa543b

Detections:

Remcos

win_remcos_auto

win_remcos_w0

malware_windows_remcos_rat

Link:

https://www.unpac.me/results/f5bbb2eb-6fbb-4803-8aaf-58e972a33060/

Malware family:

Remcos

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/d3b62483fbf6/report/overview.html

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

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:	DebuggerCheck__API Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	iexplorer_remcos Create hunting rule
Author:	iam-py-test
Description:	Detect iexplorer being taken over by Remcos

Rule name:	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer Create hunting rule
Author:	ditekSHen
Description:	detects Windows exceutables potentially bypassing UAC using eventvwr.exe

Rule name:	maldoc_find_kernel32_base_method_1 Create hunting rule
Author:	Didier Stevens (https://DidierStevens.com)

Rule name:	Remcos Create hunting rule
Author:	kevoreilly
Description:	Remcos Payload

Rule name:	REMCOS_RAT_variants Create hunting rule

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.

Malspam

RemcosRAT

exe d3b62483fbf63ecc9b1813d77f80591d6cf00892eb030486475b6634c6c2ab0b

(this sample)

Link

https://bbs.kafan.cn/forum-31-1.html

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
CHECK_PIE	Missing Position-Independent Executable (PIE) Protection	high

Reviews

ID	Capabilities	Evidence
GDI_PLUS_API	Interfaces with Graphics	gdiplus.dll::GdiplusStartup gdiplus.dll::GdipGetImageEncoders gdiplus.dll::GdipGetImageEncodersSize gdiplus.dll::GdipAlloc
MULTIMEDIA_API	Can Play Multimedia	WINMM.dll::mciSendStringA WINMM.dll::mciSendStringW WINMM.dll::PlaySoundW WINMM.dll::waveInAddBuffer WINMM.dll::waveInClose WINMM.dll::waveInOpen
SECURITY_BASE_API	Uses Security Base API	ADVAPI32.dll::AdjustTokenPrivileges
SHELL_API	Manipulates System Shell	SHELL32.dll::ShellExecuteExA SHELL32.dll::ShellExecuteW
URL_MONIKERS_API	Can Download & Execute components	urlmon.dll::URLDownloadToFileW urlmon.dll::URLOpenBlockingStreamW
WIN32_PROCESS_API	Can Create Process and Threads	KERNEL32.dll::CreateProcessW KERNEL32.dll::CreateProcessA KERNEL32.dll::OpenProcess ADVAPI32.dll::OpenProcessToken KERNEL32.dll::WriteProcessMemory KERNEL32.dll::CloseHandle WININET.dll::InternetCloseHandle
WIN_BASE_API	Uses Win Base API	KERNEL32.dll::TerminateProcess KERNEL32.dll::LoadLibraryExW KERNEL32.dll::LoadLibraryA KERNEL32.dll::GetDriveTypeA KERNEL32.dll::GetStartupInfoW KERNEL32.dll::GetCommandLineW KERNEL32.dll::GetCommandLineA
WIN_BASE_EXEC_API	Can Execute other programs	KERNEL32.dll::AllocConsole KERNEL32.dll::WriteConsoleW KERNEL32.dll::ReadConsoleW KERNEL32.dll::SetStdHandle KERNEL32.dll::GetConsoleMode KERNEL32.dll::GetConsoleCP
WIN_BASE_IO_API	Can Create Files	KERNEL32.dll::CopyFileW KERNEL32.dll::CreateDirectoryW KERNEL32.dll::CreateFileW KERNEL32.dll::DeleteFileW KERNEL32.dll::DeleteFileA KERNEL32.dll::MoveFileExW KERNEL32.dll::MoveFileW
WIN_BASE_USER_API	Retrieves Account Information	ADVAPI32.dll::GetUserNameW ADVAPI32.dll::LookupPrivilegeValueA
WIN_CRYPT_API	Uses Windows Crypt API	ADVAPI32.dll::CryptAcquireContextA ADVAPI32.dll::CryptGenRandom
WIN_REG_API	Can Manipulate Windows Registry	ADVAPI32.dll::RegCreateKeyA ADVAPI32.dll::RegCreateKeyExW ADVAPI32.dll::RegCreateKeyW ADVAPI32.dll::RegDeleteKeyA ADVAPI32.dll::RegOpenKeyExA ADVAPI32.dll::RegOpenKeyExW
WIN_SVC_API	Can Manipulate Windows Services	ADVAPI32.dll::ChangeServiceConfigW ADVAPI32.dll::ControlService ADVAPI32.dll::OpenSCManagerW ADVAPI32.dll::OpenSCManagerA ADVAPI32.dll::OpenServiceW ADVAPI32.dll::QueryServiceConfigW
WIN_USER_API	Performs GUI Actions	USER32.dll::AppendMenuA USER32.dll::EmptyClipboard USER32.dll::OpenClipboard USER32.dll::CreateWindowExA

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