MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fc5a104616191074e73ca74e64056c26e129b75395e57257eebf629772200d21. 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: 19


Intelligence 19 IOCs YARA 17 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: fc5a104616191074e73ca74e64056c26e129b75395e57257eebf629772200d21
SHA3-384 hash: 424f135409f5e5e15b53f56ee4271b95e4879a4fe9267e9cb9a1093505976b56d817bbe5879881e03ef2959634f912ce
SHA1 hash: 0cdce2551a12c15df38d10c532f3af640f5f7fd8
MD5 hash: c42b1e2c4f831723e13fa9fcfe26be96
humanhash: nine-bluebird-lima-ten
File name:1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:480'768 bytes
First seen:2024-10-08 07:40:08 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 5d354883fe6f15fcf48045037a99fb7a (118 x RemcosRAT)
ssdeep 12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQS0n9:uiLJbpI7I2WhQqZ709
Threatray 4'289 similar samples on MalwareBazaar
TLSH T121A4AE02BAD2C072D57161344D2AE735DABDBC212835997BB3E61D5BFD30180A73A7B2
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)
Magika pebin
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 :
458
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe
Verdict:
Malicious activity
Analysis date:
2024-10-08 09:52:31 UTC
Tags:
rat remcos remote
Link:
https://app.any.run/tasks/5db2e662-2514-4372-851f-9f205791dad1

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=6704e210a69182ddbe5cdcce
Tags:
Dropper Keylog Word
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
crypto epmicrosoft_visual_cc evasive eventvwr fingerprint fingerprint keylogger lolbin microsoft_visual_cc remcos shell32
Link:
https://www.filescan.io/uploads/6704e2114f53598f1492eec5/reports/a8a77dad-e7fb-4b5c-967f-7d9543adc96a/overview
Verdict:
Malicious
Labled as:
Dacic.A9349469.A.Generic
Link:
https://www.hybrid-analysis.com/sample/fc5a104616191074e73ca74e64056c26e129b75395e57257eebf629772200d21
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/81979dca-fa32-4cc0-8582-445fd2937baa
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.phis.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1528768
Signature
AI detected suspicious sample
Antivirus / Scanner detection for submitted sample
C2 URLs / IPs found in malware configuration
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 unpacking (changes PE section rights)
Found evasive API chain (may stop execution after checking mutex)
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
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Sigma detected: Remcos
Sigma detected: Suspect Svchost Activity
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 WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1528768 Sample: 1728373206596a852cdbe7ae697... Startdate: 08/10/2024 Architecture: WINDOWS Score: 100 23 ab9001.ddns.net 2->23 25 geoplugin.net 2->25 31 Multi AV Scanner detection for domain / URL 2->31 33 Suricata IDS alerts for network traffic 2->33 35 Found malware configuration 2->35 39 10 other signatures 2->39 7 1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe 3 15 2->7         started        signatures3 37 Uses dynamic DNS services 23->37 process4 dnsIp5 27 ab9001.ddns.net 64.188.16.157, 23782, 49730, 49731 ASN-QUADRANET-GLOBALUS United States 7->27 29 geoplugin.net 178.237.33.50, 49733, 80 ATOM86-ASATOM86NL Netherlands 7->29 21 C:\ProgramData\remcos\logs.dat, data 7->21 dropped 41 Detected unpacking (changes PE section rights) 7->41 43 Tries to steal Mail credentials (via file registry) 7->43 45 Contains functionalty to change the wallpaper 7->45 47 9 other signatures 7->47 12 svchost.exe 7->12         started        15 1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe 1 7->15         started        17 1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe 1 7->17         started        19 1728373206596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a849.dat-decoded.exe 2 7->19         started        file6 signatures7 process8 signatures9 49 Found evasive API chain (may stop execution after checking mutex) 12->49 51 Contains functionalty to change the wallpaper 12->51 53 Contains functionality to steal Chrome passwords or cookies 12->53 61 2 other signatures 12->61 55 Tries to steal Instant Messenger accounts or passwords 15->55 57 Tries to steal Mail credentials (via file / registry access) 15->57 59 Tries to harvest and steal browser information (history, passwords, etc) 17->59
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/fc5a104616191074e73ca74e64056c26e129b75395e57257eebf629772200d21
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/fc5a104616191074e73ca74e64056c26e129b75395e57257eebf629772200d21/
Threat name:
Win32.Trojan.Remcos
Create hunting rule
Status:
Malicious
First seen:
2024-10-08 07:41:11 UTC
File Type:
PE (Exe)
Extracted files:
8
AV detection:
23 of 24 (95.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7rnbarqwdeihjzz4u5hgiblme3qstn2tsxsxev7ox5rjo4rabuqq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
Similar samples:
2f53875cb56cc1a1f69655fcfca71ac0f952b8d582bda33e101d8b262e38d0f9
RemcosRAT
31edb5c9a0590d100f941cfcb0c142abf141fba4a90c6bddb6c7fc59b4475f28
RemcosRAT
3ab2ca682019279e28525a8ff1a72e08badba1c0f3012f926bad1528b2b0944a
RemcosRAT
9663758105ed0b4131d3cf8f4d45228aa59fdb90ccb0acc4f5332697e7bf5263
RemcosRAT
a0a124777df35d015c84f61af9a8e4d0dba82120a30fa031b73b885a13d88214
RemcosRAT
a233264c6356e52ce39f375f37c31992fa88a2b797595ea6ae339f98e8e74ac2
RemcosRAT
d3b62483fbf63ecc9b1813d77f80591d6cf00892eb030486475b6634c6c2ab0b
RemcosRAT
error
RemcosRAT
+ 4'279 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:octobers collection discovery rat spyware stealer
Link:
https://tria.ge/reports/241008-jh4njazbrc/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Reads user/profile data of web browsers
Detected Nirsoft tools
NirSoft MailPassView
NirSoft WebBrowserPassView
Remcos
Malware Config
C2 Extraction:
ab9001.ddns.net:23782
Verdict:
Malicious
Tags:
rat remcos
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/f996d60b-5fab-4fcd-94a6-8a835ec58215
Unpacked files
SH256 hash:
fc5a104616191074e73ca74e64056c26e129b75395e57257eebf629772200d21
MD5 hash:
c42b1e2c4f831723e13fa9fcfe26be96
SHA1 hash:
0cdce2551a12c15df38d10c532f3af640f5f7fd8
Detections:
Remcos
Create hunting rule
win_remcos_auto
Create hunting rule
win_remcos_w0
Create hunting rule
malware_windows_remcos_rat
Create hunting rule
Link:
https://www.unpac.me/results/4792dce5-7166-49a6-a9cf-7b39a4442fce/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/fc5a10461619/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/fc5a104616191074e73ca74e64056c26e129b75395e57257eebf629772200d21

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:iexplorer_remcos
Create hunting rule
Author:iam-py-test
Description:Detect iexplorer being taken over by Remcos
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
Create hunting rule
Author:ditekSHen
Description:detects Windows exceutables potentially bypassing UAC using eventvwr.exe
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: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.

596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a

RemcosRAT

Executable exe fc5a104616191074e73ca74e64056c26e129b75395e57257eebf629772200d21

(this sample)

  
Dropped by
SHA256 596a852cdbe7ae697de423fbd80cabe33d7a6a584032b72164b61e0692c12d1a
  
Dropped by
MD5 a050796e9e408c6fa3f423946127abe4
  
URLhaus
https://urlhaus.abuse.ch/url/3224781/
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3226677/

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::GdipGetImageEncoders
gdiplus.dll::GdipGetImageEncodersSize
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::LoadLibraryExW
KERNEL32.dll::LoadLibraryA
KERNEL32.dll::GetDriveTypeA
KERNEL32.dll::GetStartupInfoW
KERNEL32.dll::GetCommandLineW
KERNEL32.dll::GetCommandLineA
WIN_BASE_EXEC_APICan Execute other programsKERNEL32.dll::AllocConsole
KERNEL32.dll::WriteConsoleW
KERNEL32.dll::ReadConsoleW
KERNEL32.dll::SetStdHandle
KERNEL32.dll::GetConsoleMode
KERNEL32.dll::GetConsoleCP
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
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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