MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 9a21402d9ef58001becce649565f3668e660c608681f8f524e968e6ad96485a3. 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 31 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 9a21402d9ef58001becce649565f3668e660c608681f8f524e968e6ad96485a3
SHA3-384 hash: 9915fa18ca08f0b40ba53a9f970b5a1c6806339e4df60c612351cc5c2762f63be1072a983dcc78aa07be48c4727bb201
SHA1 hash: 411be0bea1af1ffd1700a09e406babeb77f2b14a
MD5 hash: 008333b6cb8854ca79cc68ed5ce3f7d9
humanhash: eighteen-mike-twelve-oregon
File name:171328314469a74a97b66c49d6bd07e9892bfb98947a176ff8d5df63dc6d40d04638cbce12349.dat-decoded
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:494'592 bytes
First seen:2024-04-16 15:59:06 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 8d5087ff5de35c3fbb9f212b47d63cad (170 x RemcosRAT)
ssdeep 6144:aXIktXfM8Lv86r9uVWAa2je4Z5zl4hgDHQQs4NTQjoHFsAOZZDAXYcNe5Gv:aX7tPMK8ctGe4Dzl4h2QnuPs/ZDTcv
Threatray 3'888 similar samples on MalwareBazaar
TLSH T1ACB49E01BAD1C072D57524300D3AF776EAB8BD2028364A7B73D61D5BFE31190B62A6B7
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):PE icon
dhash icon c4d48eaa8ad4d4f8 (1'000 x RemcosRAT, 1 x Worm.Ramnit, 1 x Vjw0rm)
Reporter abuse_ch
Tags:base64-decoded exe RemcosRAT


Avatar
abuse_ch
Malware dropped as base64 encoded payload

Intelligence

File Origin
# of uploads :
1
# of downloads :
360
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
9a21402d9ef58001becce649565f3668e660c608681f8f524e968e6ad96485a3.exe
Verdict:
Malicious activity
Analysis date:
2024-04-16 16:20:15 UTC
Tags:
remcos rat remote stealer
Link:
https://app.any.run/tasks/c80fc41e-5578-4e0d-afda-9cdda16d62b5

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
DNS request
Connection attempt
Sending a custom TCP request
Sending an HTTP GET request
Creating a window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Reading critical registry keys
Creating a file in the %temp% directory
Stealing user critical data
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
crypto evasive exploit explorer fingerprint fingerprint keylogger lolbin shell32
Link:
https://www.filescan.io/uploads/661ea08c14fabb16f4fd5dce/reports/9dcbeecb-6365-48f2-b986-8f4947efd041/overview
Verdict:
Malicious
Labled as:
Remcos.Generic
Link:
https://www.hybrid-analysis.com/sample/9a21402d9ef58001becce649565f3668e660c608681f8f524e968e6ad96485a3
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
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/37a7af7d-089d-4654-81ff-28286d9082f2
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1426896
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Detected Remcos RAT
Detected unpacking (changes PE section rights)
Found malware configuration
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for submitted file
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
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1426896 Sample: 171328314469a74a97b66c49d6b... Startdate: 16/04/2024 Architecture: WINDOWS Score: 100 18 nomoreremcos.duckdns.org 2->18 20 geoplugin.net 2->20 26 Found malware configuration 2->26 28 Malicious sample detected (through community Yara rule) 2->28 30 Antivirus detection for URL or domain 2->30 34 8 other signatures 2->34 7 171328314469a74a97b66c49d6bd07e9892bfb98947a176ff8d5df63dc6d40d04638cbce12349.dat-decoded.exe 3 13 2->7         started        signatures3 32 Uses dynamic DNS services 18->32 process4 dnsIp5 22 nomoreremcos.duckdns.org 192.3.101.28, 14645, 49712, 49714 AS-COLOCROSSINGUS United States 7->22 24 geoplugin.net 178.237.33.50, 49713, 80 ATOM86-ASATOM86NL Netherlands 7->24 36 Detected unpacking (changes PE section rights) 7->36 38 Detected Remcos RAT 7->38 40 Tries to steal Mail credentials (via file registry) 7->40 42 Maps a DLL or memory area into another process 7->42 11 171328314469a74a97b66c49d6bd07e9892bfb98947a176ff8d5df63dc6d40d04638cbce12349.dat-decoded.exe 1 7->11         started        14 171328314469a74a97b66c49d6bd07e9892bfb98947a176ff8d5df63dc6d40d04638cbce12349.dat-decoded.exe 1 7->14         started        16 171328314469a74a97b66c49d6bd07e9892bfb98947a176ff8d5df63dc6d40d04638cbce12349.dat-decoded.exe 2 7->16         started        signatures6 process7 signatures8 44 Tries to steal Instant Messenger accounts or passwords 11->44 46 Tries to steal Mail credentials (via file / registry access) 11->46 48 Tries to harvest and steal browser information (history, passwords, etc) 14->48
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/9a21402d9ef58001becce649565f3668e660c608681f8f524e968e6ad96485a3
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/9a21402d9ef58001becce649565f3668e660c608681f8f524e968e6ad96485a3/
Threat name:
Win32.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2024-04-16 00:09:55 UTC
File Type:
PE (Exe)
Extracted files:
8
AV detection:
34 of 38 (89.47%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=tiqualm66waadpwm4zevmxzwndtgbrqinapy6usos2hgvwleqwrq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
3e32447ea3b5f07c7f6a180269f5443378acb32c5d0e0bf01a5e39264f691587
RemcosRAT
7c81d05dd82233e0278c83ca0b1a3b3ad9f0fa4b8b56bef98bba964752369754
RemcosRAT
a0c4a547b08cd4669362420f9c50b04f084e0174f13911f4e8b95cec7ba12cd8
RemcosRAT
ab4c9b244a1604655032a8f69acc4273265fa35337906e05a1dc2b274b3b13a6
RemcosRAT
b6eedb3e8a594bc26e68d34f345e0cb276a247458e326bf71276fa93cab52357
RemcosRAT
fcc20fe90b357bafc8ac88a33981885be904b1ce430a4ec8b8aed5caa357df92
RemcosRAT
+ 3'878 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost collection spyware stealer
Link:
https://tria.ge/reports/240416-tfmmcaeb97/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Reads user/profile data of web browsers
NirSoft MailPassView
NirSoft WebBrowserPassView
Nirsoft
Malware Config
C2 Extraction:
nomoreremcos.duckdns.org:14645
Unpacked files
SH256 hash:
9a21402d9ef58001becce649565f3668e660c608681f8f524e968e6ad96485a3
MD5 hash:
008333b6cb8854ca79cc68ed5ce3f7d9
SHA1 hash:
411be0bea1af1ffd1700a09e406babeb77f2b14a
Detections:
Remcos
Create hunting rule
win_remcos_w0
Create hunting rule
win_remcos_auto
Create hunting rule
malware_windows_remcos_rat
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
Link:
https://www.unpac.me/results/a7c59bce-9ccf-4d8d-a04e-3b5e94d43b6b/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/9a21402d9ef5/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/9a21402d9ef58001becce649565f3668e660c608681f8f524e968e6ad96485a3

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:BLOWFISH_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for Blowfish constants
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_EXE_Packed_MPress
Create hunting rule
Author:ditekSHen
Description:Detects executables built or packed with MPress PE compressor
Rule name:INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers
Rule name:INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing many email and collaboration clients. Observed in information stealers
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:maldoc_getEIP_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:QbotStuff
Create hunting rule
Author:anonymous
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:TeslaCryptPackedMalware
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
Rule name:yara_template
Create hunting rule

File information

The table below shows additional information about this malware sample such as delivery method and external references.

69a74a97b66c49d6bd07e9892bfb98947a176ff8d5df63dc6d40d04638cbce12

RemcosRAT

Executable exe 9a21402d9ef58001becce649565f3668e660c608681f8f524e968e6ad96485a3

(this sample)

  
Dropped by
SHA256 69a74a97b66c49d6bd07e9892bfb98947a176ff8d5df63dc6d40d04638cbce12
  
Dropped by
MD5 1bef5bda0150a3871e46fb677b7d426f
  
URLhaus
https://urlhaus.abuse.ch/url/2814321/
  
Delivery method
Distributed via web download

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
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high
CHECK_NXMissing Non-Executable Memory Protectioncritical
CHECK_PIEMissing Position-Independent Executable (PIE) Protectionhigh
Reviews
IDCapabilitiesEvidence
GDI_PLUS_APIInterfaces with Graphicsgdiplus.dll::GdiplusStartup
gdiplus.dll::GdipGetImageEncodersSize
gdiplus.dll::GdipGetImageEncoders
gdiplus.dll::GdipAlloc
MULTIMEDIA_APICan Play MultimediaWINMM.dll::mciSendStringA
WINMM.dll::mciSendStringW
WINMM.dll::PlaySoundW
WINMM.dll::waveInAddBuffer
WINMM.dll::waveInClose
WINMM.dll::waveInOpen
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::AdjustTokenPrivileges
SHELL_APIManipulates System ShellSHELL32.dll::ShellExecuteExA
SHELL32.dll::ShellExecuteW
URL_MONIKERS_APICan Download & Execute componentsurlmon.dll::URLDownloadToFileW
urlmon.dll::URLOpenBlockingStreamW
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CreateProcessW
KERNEL32.dll::CreateProcessA
KERNEL32.dll::OpenProcess
ADVAPI32.dll::OpenProcessToken
KERNEL32.dll::WriteProcessMemory
KERNEL32.dll::CloseHandle
WININET.dll::InternetCloseHandle
WIN_BASE_APIUses Win Base APIKERNEL32.dll::TerminateProcess
KERNEL32.dll::FindFirstVolumeW
KERNEL32.dll::FindNextVolumeW
KERNEL32.dll::LoadLibraryExW
KERNEL32.dll::LoadLibraryA
KERNEL32.dll::GetDriveTypeA
WIN_BASE_EXEC_APICan Execute other programsKERNEL32.dll::AllocConsole
KERNEL32.dll::WriteConsoleW
KERNEL32.dll::ReadConsoleW
KERNEL32.dll::SetConsoleOutputCP
KERNEL32.dll::SetConsoleTextAttribute
KERNEL32.dll::SetStdHandle
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CopyFileW
KERNEL32.dll::CreateDirectoryW
KERNEL32.dll::CreateFileMappingW
KERNEL32.dll::CreateFileW
KERNEL32.dll::DeleteFileW
KERNEL32.dll::DeleteFileA
WIN_BASE_USER_APIRetrieves Account InformationADVAPI32.dll::GetUserNameW
ADVAPI32.dll::LookupPrivilegeValueA
KERNEL32.dll::QueryDosDeviceW
WIN_CRYPT_APIUses Windows Crypt APIADVAPI32.dll::CryptAcquireContextA
ADVAPI32.dll::CryptGenRandom
WIN_REG_APICan Manipulate Windows RegistryADVAPI32.dll::RegCreateKeyA
ADVAPI32.dll::RegCreateKeyExW
ADVAPI32.dll::RegCreateKeyW
ADVAPI32.dll::RegDeleteKeyA
ADVAPI32.dll::RegOpenKeyExA
ADVAPI32.dll::RegOpenKeyExW
WIN_SVC_APICan Manipulate Windows ServicesADVAPI32.dll::ChangeServiceConfigW
ADVAPI32.dll::ControlService
ADVAPI32.dll::OpenSCManagerW
ADVAPI32.dll::OpenSCManagerA
ADVAPI32.dll::OpenServiceW
ADVAPI32.dll::QueryServiceConfigW
WIN_USER_APIPerforms GUI ActionsUSER32.dll::AppendMenuA
USER32.dll::EmptyClipboard
USER32.dll::OpenClipboard
USER32.dll::CreateWindowExA

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