MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1b7645def29702c924a9cff0a5234b8a697f6d89be75593a725cf8f7da8c7288. 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 18 File information Comments

SHA256 hash:	1b7645def29702c924a9cff0a5234b8a697f6d89be75593a725cf8f7da8c7288
SHA3-384 hash:	ce92e9da1f1901158353b2091b22de2dd943f93c59c80a16e7757ecc0980523b879a6bac58440cd2ef54189d3dc7c9d6
SHA1 hash:	993301bbe17c097debb66c6dec278d4f74063b41
MD5 hash:	2b985c758a227407855e1d8e14f8863d
humanhash:	hamper-william-harry-mississippi
File name:	172200150645e30715396b41ed298fc2fc05d94f3a962536daa72f2c5d72e7d784323a4055802.dat-decoded
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	494'592 bytes
First seen:	2024-07-26 13:45:08 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	8d5087ff5de35c3fbb9f212b47d63cad (170 x RemcosRAT)
ssdeep	6144:QXIktXfM8Lv86r9uVWAa2je4Z5zl4hgDHQQs4NTQjoHFsAOZZoAX0cNz5Gv:QX7tPMK8ctGe4Dzl4h2QnuPs/ZoGcv
TLSH	T11FB49E01BAD1C072D57524300D3AF776EAB8BD2028364A7B73D61D5BFE31190B62A6B7
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	abuse_ch
Tags:	base64-decoded exe RemcosRAT

abuse_ch

Malware dropped as base64 encoded payload

Intelligence

File Origin

# of uploads :

# of downloads :

498

Origin country :

Vendor Threat Intelligence

Malware family:

remcos

ID:

File name:

172200150645e30715396b41ed298fc2fc05d94f3a962536daa72f2c5d72e7d784323a4055802.dat-decoded.exe

Verdict:

Malicious activity

Analysis date:

2024-07-26 13:55:37 UTC

Tags:

keylogger rat remcos remote

Link:

https://app.any.run/tasks/2c9cca06-43b8-473c-a10d-7806f8508d97

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Detection(s):

Win.Trojan.Remcos-9841897-0

Win.Trojan.Remcos-10002580-0

Verdict:

Malicious

Score:

99.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=66a3a87381e42e2b16c7b88d

Tags:

Discovery Infostealer Network Stealth

Result

Verdict:

Malware

Maliciousness:

Behaviour

Сreating synchronization primitives

Setting a keyboard event handler

DNS request

Connection attempt

Sending a custom TCP request

Sending an HTTP GET request

Creating a file in the %temp% subdirectories

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.

Malware family:

REMCOS

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/78673c0a-e6e8-4d72-b31d-899c56fb12d7

Result

Threat name:

Remcos

Detection:

malicious

Classification:

rans.phis.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1483072

Signature

AI detected suspicious sample

Antivirus / Scanner detection for submitted sample

C2 URLs / IPs found in malware configuration

Contains functionality to bypass UAC (CMSTPLUA)

Contains functionality to inject code into remote processes

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

Delayed program exit found

Detected Remcos RAT

Detected unpacking (changes PE section rights)

Found malware configuration

Installs a global keyboard hook

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Maps a DLL or memory area into another process

Sigma detected: Remcos

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 dynamic DNS services

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/1b7645def29702c924a9cff0a5234b8a697f6d89be75593a725cf8f7da8c7288

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/1b7645def29702c924a9cff0a5234b8a697f6d89be75593a725cf8f7da8c7288/

Threat name:

Win32.Backdoor.Remcos

Status:

Malicious

First seen:

2024-07-26 13:46:05 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

34 of 38 (89.47%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=dn3elxxss4bmsjfjz7ykki2lrjux63mjxz2vsotslt4ppwumokea._file

Verdict:

malicious

Label(s):

remcos

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:remotehost collection credential_access discovery rat spyware stealer

Link:

https://tria.ge/reports/240726-q2ypys1fkk/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

System Location Discovery: System Language Discovery

Suspicious use of SetThreadContext

Accesses Microsoft Outlook accounts

Reads user/profile data of web browsers

Credentials from Password Stores: Credentials from Web Browsers

Detected Nirsoft tools

NirSoft MailPassView

NirSoft WebBrowserPassView

Remcos

Malware Config

C2 Extraction:

maveing.duckdns.org:18576

Verdict:

Malicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/84b10039-03c0-45e4-8c98-bfe0737fa798

Unpacked files

SH256 hash:

1b7645def29702c924a9cff0a5234b8a697f6d89be75593a725cf8f7da8c7288

MD5 hash:

2b985c758a227407855e1d8e14f8863d

SHA1 hash:

993301bbe17c097debb66c6dec278d4f74063b41

Detections:

Remcos

win_remcos_auto

win_remcos_w0

malware_windows_remcos_rat

Link:

https://www.unpac.me/results/2cdfbe7e-dc07-4ef2-a7af-946b8b06d971/

Malware family:

Remcos

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/1b7645def297/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/1b7645def29702c924a9cff0a5234b8a697f6d89be75593a725cf8f7da8c7288

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:	DebuggerCheck__QueryInfo 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_CMSTPCOM Create hunting rule
Author:	ditekSHen
Description:	Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)

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:	Remcos_unpacked_PulseIntel Create hunting rule
Author:	PulseIntel
Description:	Remcos Payload

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.

45e30715396b41ed298fc2fc05d94f3a962536daa72f2c5d72e7d784323a4055

RemcosRAT

exe 1b7645def29702c924a9cff0a5234b8a697f6d89be75593a725cf8f7da8c7288

(this sample)

Dropped by

SHA256 45e30715396b41ed298fc2fc05d94f3a962536daa72f2c5d72e7d784323a4055

Dropped by

MD5 8a4d6996ce20753eb9327bedc8f98c07

Dropped by

SHA256 45e30715396b41ed298fc2fc05d94f3a962536daa72f2c5d72e7d784323a4055

Dropped by

MD5 8a4d6996ce20753eb9327bedc8f98c07

URLhaus

https://urlhaus.abuse.ch/url/3071712/

Delivery method

Distributed via web download

URLhaus

https://urlhaus.abuse.ch/url/3071713/

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::GdipGetImageEncodersSize gdiplus.dll::GdipGetImageEncoders 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::FindFirstVolumeW KERNEL32.dll::FindNextVolumeW KERNEL32.dll::LoadLibraryExW KERNEL32.dll::LoadLibraryA KERNEL32.dll::GetDriveTypeA
WIN_BASE_EXEC_API	Can Execute other programs	KERNEL32.dll::AllocConsole KERNEL32.dll::WriteConsoleW KERNEL32.dll::ReadConsoleW KERNEL32.dll::SetConsoleOutputCP KERNEL32.dll::SetConsoleTextAttribute KERNEL32.dll::SetStdHandle
WIN_BASE_IO_API	Can Create Files	KERNEL32.dll::CopyFileW KERNEL32.dll::CreateDirectoryW KERNEL32.dll::CreateFileMappingW KERNEL32.dll::CreateFileW KERNEL32.dll::DeleteFileW KERNEL32.dll::DeleteFileA
WIN_BASE_USER_API	Retrieves Account Information	ADVAPI32.dll::GetUserNameW ADVAPI32.dll::LookupPrivilegeValueA KERNEL32.dll::QueryDosDeviceW
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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