MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 12b7831b3de7aa65ebd235c8866a7edfb6e675d4c64e4149e2a228001ca7bee1. 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 1 YARA 15 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 12b7831b3de7aa65ebd235c8866a7edfb6e675d4c64e4149e2a228001ca7bee1
SHA3-384 hash: 5d7c72ef78ec40081e266d150dc14fc784146a79331391376db06d6576df432f02771fd6b8ccb1373d5beaa44491e614
SHA1 hash: 2123097bcdca7b867ba041ca34084d2a959d6563
MD5 hash: 11175a6ababae72b8c0c15b3b145b250
humanhash: cola-michigan-kilo-mirror
File name:174712512420ec3961f053a46a3a171ae99eec3f7c930ae6ed259c624188ec792451071d26790.dat-decoded
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:498'176 bytes
First seen:2025-05-13 08:32:08 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 41e05d591d7d93bdd5bc6d5da04da74b (53 x RemcosRAT, 1 x Expiro)
ssdeep 6144:kIlSCa0RPvRz+n8Qr1D0ZGESuHabmvHOE4mCp6qtydBnP+Y4+3sAORZ/FXvXc6NJ:k200OFp+G0imvHn3Cp6qyBP+YdsvZ//
Threatray 912 similar samples on MalwareBazaar
TLSH T16DB4B001B9E2C172D57654300D2AE776DEBCBD2028358D7BB3D60D57FE30190AA39AB6
TrID 32.2% (.EXE) Win64 Executable (generic) (10522/11/4)
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)
Magika pebin
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

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
154.39.0.186:4488 https://threatfox.abuse.ch/ioc/1517078/

Intelligence

File Origin
# of uploads :
1
# of downloads :
488
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
174712512420ec3961f053a46a3a171ae99eec3f7c930ae6ed259c624188ec792451071d26790.dat-decoded
Verdict:
Malicious activity
Analysis date:
2025-05-13 09:37:41 UTC
Tags:
rat remcos
Link:
https://app.any.run/tasks/c9e31371-10b0-4c9a-b6e3-d9e91c3583ce

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Win.Trojan.Remcos-9841897-0
Create hunting rule

Win.Trojan.Remcos-10002580-0
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6823052ce16384d6a70402b5
Tags:
crypted dropper remcos remo
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Setting a keyboard event handler
Connection attempt to an infection source
Sending a TCP request to an infection source
Connection attempt
Sending a custom TCP request
DNS request
Sending an HTTP GET request
Launching a process
Creating a file
Reading critical registry keys
Creating a file in the %temp% directory
Query of malicious DNS domain
Stealing user critical data
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
cmd config-extracted crypto evasive exploit explorer fingerprint fingerprint keylogger lolbin microsoft_visual_cc packed rat rat remcos remcos windows
Link:
https://www.filescan.io/uploads/6823038a0b64e174c424ad4f/reports/f8fde7c9-77b0-40ef-813f-6b429408182b/overview
Verdict:
Malicious
Labled as:
Trojan.Remcos
Link:
https://www.hybrid-analysis.com/sample/12b7831b3de7aa65ebd235c8866a7edfb6e675d4c64e4149e2a228001ca7bee1
Malware family:
REMCOS
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/ac07806a-ae8f-4097-a5b0-69622cbd419a
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1688746
Signature
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 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
Detected Remcos RAT
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 submitted file
Sample uses process hollowing technique
Sigma detected: Remcos
Suricata IDS alerts for network traffic
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
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
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1688746 Sample: 174712512420ec3961f053a46a3... Startdate: 13/05/2025 Architecture: WINDOWS Score: 100 20 myonline40804.duckdns.org 2->20 22 geoplugin.net 2->22 30 Suricata IDS alerts for network traffic 2->30 32 Found malware configuration 2->32 34 Malicious sample detected (through community Yara rule) 2->34 38 9 other signatures 2->38 7 174712512420ec3961f053a46a3a171ae99eec3f7c930ae6ed259c624188ec792451071d26790.dat-decoded.exe 4 15 2->7         started        signatures3 36 Uses dynamic DNS services 20->36 process4 dnsIp5 24 myonline40804.duckdns.org 192.169.69.26, 2404, 4488, 49702 WOWUS United States 7->24 26 154.39.0.186, 4488, 49704, 49706 COGENT-174US United States 7->26 28 geoplugin.net 178.237.33.50, 49709, 80 ATOM86-ASATOM86NL Netherlands 7->28 40 Contains functionality to bypass UAC (CMSTPLUA) 7->40 42 Detected Remcos RAT 7->42 44 Contains functionalty to change the wallpaper 7->44 46 8 other signatures 7->46 11 recover.exe 2 7->11         started        14 recover.exe 1 7->14         started        16 recover.exe 1 7->16         started        18 recover.exe 7->18         started        signatures6 process7 signatures8 48 Tries to steal Mail credentials (via file registry) 11->48 50 Tries to harvest and steal browser information (history, passwords, etc) 11->50 52 Tries to steal Instant Messenger accounts or passwords 14->52 54 Tries to steal Mail credentials (via file / registry access) 16->54
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/12b7831b3de7aa65ebd235c8866a7edfb6e675d4c64e4149e2a228001ca7bee1
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/12b7831b3de7aa65ebd235c8866a7edfb6e675d4c64e4149e2a228001ca7bee1/
Threat name:
Win32.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2025-05-13 08:33:10 UTC
File Type:
PE (Exe)
Extracted files:
8
AV detection:
31 of 37 (83.78%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ck3yggz546vgl26sgxeim2t6363om5ouyzhecspcuiuaahfhx3qq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
124b893db4e3bc683c296095df39918daa94808e0b4043686d8f380a30c38cc8
RemcosRAT
75fed14fd61067a1c0c2a10d0eefcc349308e1f4a1993a075a9f0c768affab13
RemcosRAT
90d3d574c49353f3f8316a30ed7798e84524a1d8b7c976231c451a32e9e79301
RemcosRAT
b7d205a1560b07a92d744053744c29823064e2c415a71887fccd8524a3cad3fb
RemcosRAT
bad1f425b5d5dd645239c646b01d12175341e887945e26a955f51f9da4427b17
RemcosRAT
error
RemcosRAT
fa1c16a3024d35ebc4f6996d1791ead89a08dae2ebd87e39c9997c04613c4645
RemcosRAT
fa61518375428781260a99edf971bcc98b70df3e7c5d2887367393f4e206f30d
RemcosRAT
+ 902 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost collection discovery rat
Link:
https://tria.ge/reports/250513-kf5cqasns8/
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
Detected Nirsoft tools
NirSoft MailPassView
NirSoft WebBrowserPassView
Remcos
Remcos family
Malware Config
C2 Extraction:
myonline40804.duckdns.org:2404
myonline40804.duckdns.org:4488
154.39.0.186:4488
154.39.0.186:2404
154.39.0.186:6666
Verdict:
Malicious
Tags:
rat remcos Win.Trojan.Remcos-9841897-0
YARA:
malware_windows_remcos_rat REMCOS_RAT_variants Remcos_Payload win_remcos_rat_unpacked Windows_Trojan_Remcos_b296e965 MAL_EXE_Remcos_RAT_Jul_22 Remcos
Link:
https://app.threat.zone/submission/c7bd91a1-691b-465b-8c1b-18d0ccda8ef1
Unpacked files
SH256 hash:
12b7831b3de7aa65ebd235c8866a7edfb6e675d4c64e4149e2a228001ca7bee1
MD5 hash:
11175a6ababae72b8c0c15b3b145b250
SHA1 hash:
2123097bcdca7b867ba041ca34084d2a959d6563
Detections:
win_remcos_w0
Create hunting rule
win_remcos_auto
Create hunting rule
Remcos
Create hunting rule
Link:
https://www.unpac.me/results/7e026bfb-0f63-4d7e-8189-5e92d5f7a421/
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/12b7831b3de7aa65ebd235c8866a7edfb6e675d4c64e4149e2a228001ca7bee1

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: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: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.

20ec3961f053a46a3a171ae99eec3f7c930ae6ed259c624188ec792451071d26

RemcosRAT

Executable exe 12b7831b3de7aa65ebd235c8866a7edfb6e675d4c64e4149e2a228001ca7bee1

(this sample)

  
Dropped by
SHA256 20ec3961f053a46a3a171ae99eec3f7c930ae6ed259c624188ec792451071d26
  
Dropped by
MD5 fbd1d311faa0dcda438c707f472b2dcb
  
URLhaus
https://urlhaus.abuse.ch/url/3542598/
  
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
ADVAPI32.dll::GetTokenInformation
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::LoadLibraryA
KERNEL32.dll::LoadLibraryW
KERNEL32.dll::LoadLibraryExW
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::CreateFileW
KERNEL32.dll::DeleteFileW
KERNEL32.dll::DeleteFileA
KERNEL32.dll::MoveFileExW
KERNEL32.dll::MoveFileW
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::RegCreateKeyExW
ADVAPI32.dll::RegCreateKeyW
ADVAPI32.dll::RegCreateKeyA
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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