MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c3a3e14fe23932fae3b25d5845274b981ca64a465ec56fe2f042dbfe05568d16. 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:	c3a3e14fe23932fae3b25d5845274b981ca64a465ec56fe2f042dbfe05568d16
SHA3-384 hash:	5afc1fee1e7cab0651410b290b8f111fd2efe0b2d937a3390b4f3a653cdc7305ef612ae7549c3fb6331c45b90c8e55b9
SHA1 hash:	cf775ac158f2cfb38c1b42eb7518c5fba3df29e0
MD5 hash:	f4e63286a64b5f4ac456af21c0959113
humanhash:	texas-uncle-nuts-hotel
File name:	1726582445e64b2f195a9cbb320d72ea849cf0df04680e1272fe226b09851cc60bc5c07091697.dat-decoded
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	494'592 bytes
First seen:	2024-09-17 14:14:06 UTC
Last seen:	2024-10-02 03:32:07 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	1389569a3a39186f3eb453b501cfe688 (98 x RemcosRAT)
ssdeep	6144:wTz+c6KHYBhDc1RGJdv//NkUn+N5Bkf/0TELRvIZPjbsAOZZBAXccroT4:wTlrYw1RUh3NFn+N5WfIQIjbs/ZBrT4
Threatray	4'461 similar samples on MalwareBazaar
TLSH	T107B49E01BAD1C072D97514300D3AF776EAB8BD201835497B73EA1D5BFE31190A62AAB7
TrID	40.3% (.EXE) Win64 Executable (generic) (10523/12/4) 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
File icon (PE):
dhash icon	c4d48eaa8ad4d4f8 (1'000 x RemcosRAT, 1 x Worm.Ramnit, 1 x Vjw0rm)
Reporter	abuse_ch
Tags:	base64-decoded BlindEagle exe RemcosRAT

abuse_ch

Malware dropped as base64 encoded payload

Intelligence

File Origin

# of uploads :

# of downloads :

423

Origin country :

Vendor Threat Intelligence

Malware family:

remcos

ID:

File name:

1726582445e64b2f195a9cbb320d72ea849cf0df04680e1272fe226b09851cc60bc5c07091697.dat-decoded

Verdict:

Malicious activity

Analysis date:

2024-09-17 14:19:40 UTC

Tags:

rat remcos remote evasion

Link:

https://app.any.run/tasks/6443c4dc-2f98-410d-be96-3be5c7df1b0a

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=66e98ee95d6a2b58599a92af

Tags:

Discovery Infostealer Network Stealth

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

crypto epmicrosoft_visual_cc evasive exploit explorer fingerprint fingerprint keylogger lolbin microsoft_visual_cc remcos shell32

Link:

https://www.filescan.io/uploads/66e98ef03c9389b729b8f81d/reports/0cce35ce-11ca-461c-bf8d-7d4fa5e23038/overview

Verdict:

Malicious

Labled as:

Remcos.Generic

Link:

https://www.hybrid-analysis.com/sample/c3a3e14fe23932fae3b25d5845274b981ca64a465ec56fe2f042dbfe05568d16

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/ce45abfa-f08c-449a-9f32-c5f59b86be8d

Result

Threat name:

Remcos

Detection:

malicious

Classification:

rans.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1512558

Signature

AI detected suspicious sample

Antivirus / Scanner detection for submitted sample

Antivirus detection for URL or domain

C2 URLs / IPs found in malware configuration

Contains functionality to bypass UAC (CMSTPLUA)

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

Found malware configuration

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Sigma detected: Remcos

Suricata IDS alerts for network traffic

Uses dynamic DNS services

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/c3a3e14fe23932fae3b25d5845274b981ca64a465ec56fe2f042dbfe05568d16

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/c3a3e14fe23932fae3b25d5845274b981ca64a465ec56fe2f042dbfe05568d16/

Threat name:

Win32.Backdoor.Remcos

Status:

Malicious

First seen:

2024-09-12 19:23:54 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=yor6ct7chezpvy5slvmekj2ltaokmssgl3cw7yxqiln74bkwrula._file

Verdict:

malicious

Label(s):

remcos

RemcosRAT

8c8cad5c12f471f42d5992e71bd32478aedb40af922b03ef4920047012c04d1f

RemcosRAT

99a0f2de32a6c804842d1e0a0370af980f922aa4b5d8be9d4834911891695ceb

RemcosRAT

99a11f085f087ed16112cda26f1eb660801e83502fe0d7cf7d6f2e0b163855b6

RemcosRAT

babc0e3f52501b3128c5b0d806696a82c6575d7194a721d0e354d9bc7b077d91

RemcosRAT

c3a3e14fe23932fae3b25d5845274b981ca64a465ec56fe2f042dbfe05568d16

RemcosRAT

caf42d7fbf9c9e246bf7266cd08a763f39ee1eaf06c7f6ce0758be2511458b5a

RemcosRAT

e582b99d0e9ea6b9ee35cc35923ea7c093caf49f3a260091e499ea70924fc423

RemcosRAT

+ 4'451 additional samples on MalwareBazaar

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos botnet:remotehost discovery

Link:

https://tria.ge/reports/240917-rkkmfaxelq/

Behaviour

System Location Discovery: System Language Discovery

Malware Config

C2 Extraction:

remcosco222.duckdns.org:7877

Verdict:

Malicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/5774fe81-0f38-4a47-8de0-8c301541b620

Unpacked files

SH256 hash:

c3a3e14fe23932fae3b25d5845274b981ca64a465ec56fe2f042dbfe05568d16

MD5 hash:

f4e63286a64b5f4ac456af21c0959113

SHA1 hash:

cf775ac158f2cfb38c1b42eb7518c5fba3df29e0

Detections:

Remcos

win_remcos_auto

win_remcos_w0

malware_windows_remcos_rat

Link:

https://www.unpac.me/results/01351f9f-c321-4f43-b87e-576df5afdc0c/

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/c3a3e14fe23932fae3b25d5845274b981ca64a465ec56fe2f042dbfe05568d16

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:	pe_detect_tls_callbacks Create hunting rule

Rule name:	RANSOMWARE Create hunting rule
Author:	ToroGuitar

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.

e64b2f195a9cbb320d72ea849cf0df04680e1272fe226b09851cc60bc5c07091

RemcosRAT

exe c3a3e14fe23932fae3b25d5845274b981ca64a465ec56fe2f042dbfe05568d16

(this sample)

Dropped by

SHA256 e64b2f195a9cbb320d72ea849cf0df04680e1272fe226b09851cc60bc5c07091

Dropped by

MD5 a46b19c218f7168ec16a26657d22ecbd

URLhaus

https://urlhaus.abuse.ch/url/3178375/

Delivery method

Distributed via web download

URLhaus

https://urlhaus.abuse.ch/url/3178405/

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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