MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fa1c16a3024d35ebc4f6996d1791ead89a08dae2ebd87e39c9997c04613c4645. 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: 20


Intelligence 20 IOCs YARA 19 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: fa1c16a3024d35ebc4f6996d1791ead89a08dae2ebd87e39c9997c04613c4645
SHA3-384 hash: f454a5980e0394768df79ce3ecf52a8b7566c5011131ac500c29b0eade8d6f1a980077d68bc2954d62334546e65a2969
SHA1 hash: d185b86120ea6fcae137edcff25547fda2b6d4a5
MD5 hash: 0bea38a3f664f5c8d72ab74db022aacd
humanhash: seven-king-thirteen-lamp
File name:nyoilsafkjawd.exe
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:498'688 bytes
First seen:2025-03-11 16:36:02 UTC
Last seen:2025-03-13 13:40:18 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 41e05d591d7d93bdd5bc6d5da04da74b (52 x RemcosRAT, 1 x Expiro)
ssdeep 12288:P200OFp+G0imvHn3Cp6qyBP+YdsvZGH3:e0Zp+ViehBWY0ZS
TLSH T199B4B001B9E2C172E57654300D2AE776DEBCBD1028358D7BB3D60D57FE30190AA39AB6
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 aachum
Tags:exe RemcosRAT


Avatar
iamaachum
https://github.com/deripascod/coderoom/blob/main/nyoilsafkjawd.exe

Remcos C2: 91.135.156.200:8109

Intelligence

File Origin
# of uploads :
2
# of downloads :
456
Origin country :
ES ES
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
nyoilsafkjawd.exe
Verdict:
Malicious activity
Analysis date:
2025-03-11 16:46:27 UTC
Tags:
remcos
Link:
https://app.any.run/tasks/dae42fdd-0e11-4839-80ce-9fa5a148d56f

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67d06d82dff6bd9219084463
Tags:
ransomware downloader dropper remcos
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Creating a file in the %AppData% subdirectories
Enabling the 'hidden' option for recently created files
Creating a process from a recently created file
Setting a keyboard event handler
Connection attempt
Launching a process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
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 remcos remcos windows
Link:
https://www.filescan.io/uploads/67d066873c5f644bd94d8be2/reports/ccbf96b2-ceee-4ab1-aa8a-7bde75370401/overview
Verdict:
Malicious
Labled as:
Trojan.Remcos
Link:
https://www.hybrid-analysis.com/sample/fa1c16a3024d35ebc4f6996d1791ead89a08dae2ebd87e39c9997c04613c4645
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/f87062c6-2713-4a2d-b4e7-93a9bc14f11c
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1635477
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
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
Creates autostart registry keys with suspicious names
Found evasive API chain (may stop execution after checking mutex)
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 dropped file
Multi AV Scanner detection for submitted file
Suricata IDS alerts for network traffic
Writes to foreign memory regions
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1635477 Sample: nyoilsafkjawd.exe Startdate: 11/03/2025 Architecture: WINDOWS Score: 100 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 36 13 other signatures 2->36 7 nyoilsafkjawd.exe 3 4 2->7         started        11 app.exe 2->11         started        13 app.exe 2->13         started        15 app.exe 2->15         started        process3 file4 24 C:\Users\user\AppData\Roaming\...\app.exe, PE32 7->24 dropped 26 C:\Users\user\...\app.exe:Zone.Identifier, ASCII 7->26 dropped 52 Contains functionality to bypass UAC (CMSTPLUA) 7->52 54 Contains functionalty to change the wallpaper 7->54 56 Creates autostart registry keys with suspicious names 7->56 58 3 other signatures 7->58 17 app.exe 5 4 7->17         started        signatures5 process6 dnsIp7 28 91.135.156.200, 49707, 49712, 49714 WESTCALL-ASRU Russian Federation 17->28 38 Writes to foreign memory regions 17->38 40 Maps a DLL or memory area into another process 17->40 42 Installs a global keyboard hook 17->42 21 RmClient.exe 17->21         started        signatures8 process9 signatures10 44 Contains functionality to bypass UAC (CMSTPLUA) 21->44 46 Found evasive API chain (may stop execution after checking mutex) 21->46 48 Contains functionalty to change the wallpaper 21->48 50 2 other signatures 21->50
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/fa1c16a3024d35ebc4f6996d1791ead89a08dae2ebd87e39c9997c04613c4645
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/fa1c16a3024d35ebc4f6996d1791ead89a08dae2ebd87e39c9997c04613c4645/
Threat name:
Win32.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2025-03-11 16:36:13 UTC
File Type:
PE (Exe)
Extracted files:
8
AV detection:
22 of 24 (91.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7iobniycju26xrhwtfwrpepk3cnarwxc5pmh4oojtf6aiyj4izcq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
error
RemcosRAT
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:firefox mts discovery persistence rat
Link:
https://tria.ge/reports/250311-t4bvrayjw9/
Behaviour
Modifies registry class
Suspicious behavior: MapViewOfSection
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Adds Run key to start application
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Remcos
Remcos family
Malware Config
C2 Extraction:
91.135.156.200:8109
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/db877cb8-5587-40fe-9038-cc0579c41d43
Unpacked files
SH256 hash:
fa1c16a3024d35ebc4f6996d1791ead89a08dae2ebd87e39c9997c04613c4645
MD5 hash:
0bea38a3f664f5c8d72ab74db022aacd
SHA1 hash:
d185b86120ea6fcae137edcff25547fda2b6d4a5
Detections:
win_remcos_w0
Create hunting rule
win_remcos_auto
Create hunting rule
Remcos
Create hunting rule
Link:
https://www.unpac.me/results/1c85d6f9-69c5-460c-84a1-3b0b2fe901b1/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/fa1c16a3024d/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/fa1c16a3024d35ebc4f6996d1791ead89a08dae2ebd87e39c9997c04613c4645

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.

Web download

RemcosRAT

Executable exe fa1c16a3024d35ebc4f6996d1791ead89a08dae2ebd87e39c9997c04613c4645

(this sample)

  
Link
https://tria.ge/250311-tp2gvsxpv2/behavioral23
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3474134/

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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